/* $OpenBSD: c_ksh.c,v 1.33 2009/02/07 14:03:24 kili Exp $ */ /* $OpenBSD: c_sh.c,v 1.41 2010/03/27 09:10:01 jmc Exp $ */ /* $OpenBSD: c_test.c,v 1.18 2009/03/01 20:11:06 otto Exp $ */ /* $OpenBSD: c_ulimit.c,v 1.17 2008/03/21 12:51:19 millert Exp $ */ /*- * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, * 2010, 2011, 2012 * Thorsten Glaser * * Provided that these terms and disclaimer and all copyright notices * are retained or reproduced in an accompanying document, permission * is granted to deal in this work without restriction, including un- * limited rights to use, publicly perform, distribute, sell, modify, * merge, give away, or sublicence. * * This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to * the utmost extent permitted by applicable law, neither express nor * implied; without malicious intent or gross negligence. In no event * may a licensor, author or contributor be held liable for indirect, * direct, other damage, loss, or other issues arising in any way out * of dealing in the work, even if advised of the possibility of such * damage or existence of a defect, except proven that it results out * of said person's immediate fault when using the work as intended. */ #include "sh.h" #if HAVE_SELECT #if HAVE_SYS_BSDTYPES_H #include #endif #if HAVE_SYS_SELECT_H #include #endif #if HAVE_BSTRING_H #include #endif #endif __RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.212 2012/04/06 13:28:59 tg Exp $"); #if HAVE_KILLPG /* * use killpg if < -1 since -1 does special things * for some non-killpg-endowed kills */ #define mksh_kill(p,s) ((p) < -1 ? killpg(-(p), (s)) : kill((p), (s))) #else /* cross fingers and hope kill is killpg-endowed */ #define mksh_kill kill #endif /* XXX conditions correct? */ #if !defined(RLIM_INFINITY) && !defined(MKSH_NO_LIMITS) #define MKSH_NO_LIMITS 1 #endif #ifdef MKSH_NO_LIMITS #define c_ulimit c_true #endif static int c_true(const char **wp MKSH_A_UNUSED) { return (0); } static int c_false(const char **wp MKSH_A_UNUSED) { return (1); } /* * A leading = means assignments before command are kept; * a leading * means a POSIX special builtin; * a leading + means a POSIX regular builtin * (* and + should not be combined). */ const struct builtin mkshbuiltins[] = { {"*=.", c_dot}, {"*=:", c_true}, {"[", c_test}, {"*=break", c_brkcont}, {Tgbuiltin, c_builtin}, {"*=continue", c_brkcont}, {"*=eval", c_eval}, {"*=exec", c_exec}, {"*=exit", c_exitreturn}, {"+false", c_false}, {"*=return", c_exitreturn}, {Tsgset, c_set}, {"*=shift", c_shift}, {"=times", c_times}, {"*=trap", c_trap}, {"+=wait", c_wait}, {"+read", c_read}, {"test", c_test}, {"+true", c_true}, {"ulimit", c_ulimit}, {"+umask", c_umask}, {"*=unset", c_unset}, /* no =: AT&T manual wrong */ {Tpalias, c_alias}, {"+cd", c_cd}, /* dash compatibility hack */ {"chdir", c_cd}, {"+command", c_command}, {"echo", c_print}, {"*=export", c_typeset}, {"+fc", c_fc}, {"+getopts", c_getopts}, {"=global", c_typeset}, {"+jobs", c_jobs}, {"+kill", c_kill}, {"let", c_let}, {"print", c_print}, #ifdef MKSH_PRINTF_BUILTIN {"printf", c_printf}, #endif {"pwd", c_pwd}, {"*=readonly", c_typeset}, {T_typeset, c_typeset}, {Tpunalias, c_unalias}, {"whence", c_whence}, #ifndef MKSH_UNEMPLOYED {"+bg", c_fgbg}, {"+fg", c_fgbg}, #endif {"bind", c_bind}, {"cat", c_cat}, #if HAVE_MKNOD {"mknod", c_mknod}, #endif {"realpath", c_realpath}, {"rename", c_rename}, #if HAVE_SELECT {"sleep", c_sleep}, #endif #ifdef __MirBSD__ /* alias to "true" for historical reasons */ {"domainname", c_true}, #endif {NULL, (int (*)(const char **))NULL} }; struct kill_info { int num_width; int name_width; }; static const struct t_op { char op_text[4]; Test_op op_num; } u_ops[] = { {"-a", TO_FILAXST }, {"-b", TO_FILBDEV }, {"-c", TO_FILCDEV }, {"-d", TO_FILID }, {"-e", TO_FILEXST }, {"-f", TO_FILREG }, {"-G", TO_FILGID }, {"-g", TO_FILSETG }, {"-h", TO_FILSYM }, {"-H", TO_FILCDF }, {"-k", TO_FILSTCK }, {"-L", TO_FILSYM }, {"-n", TO_STNZE }, {"-O", TO_FILUID }, {"-o", TO_OPTION }, {"-p", TO_FILFIFO }, {"-r", TO_FILRD }, {"-s", TO_FILGZ }, {"-S", TO_FILSOCK }, {"-t", TO_FILTT }, {"-u", TO_FILSETU }, {"-w", TO_FILWR }, {"-x", TO_FILEX }, {"-z", TO_STZER }, {"", TO_NONOP } }; static const struct t_op b_ops[] = { {"=", TO_STEQL }, {"==", TO_STEQL }, {"!=", TO_STNEQ }, {"<", TO_STLT }, {">", TO_STGT }, {"-eq", TO_INTEQ }, {"-ne", TO_INTNE }, {"-gt", TO_INTGT }, {"-ge", TO_INTGE }, {"-lt", TO_INTLT }, {"-le", TO_INTLE }, {"-ef", TO_FILEQ }, {"-nt", TO_FILNT }, {"-ot", TO_FILOT }, {"", TO_NONOP } }; static int test_oexpr(Test_env *, bool); static int test_aexpr(Test_env *, bool); static int test_nexpr(Test_env *, bool); static int test_primary(Test_env *, bool); static Test_op ptest_isa(Test_env *, Test_meta); static const char *ptest_getopnd(Test_env *, Test_op, bool); static void ptest_error(Test_env *, int, const char *); static char *kill_fmt_entry(char *, size_t, int, const void *); static void p_time(struct shf *, bool, long, int, int, const char *, const char *) MKSH_A_NONNULL((__nonnull__ (6, 7))); int c_pwd(const char **wp) { int optc; bool physical = tobool(Flag(FPHYSICAL)); char *p, *allocd = NULL; while ((optc = ksh_getopt(wp, &builtin_opt, "LP")) != -1) switch (optc) { case 'L': physical = false; break; case 'P': physical = true; break; case '?': return (1); } wp += builtin_opt.optind; if (wp[0]) { bi_errorf("too many arguments"); return (1); } p = current_wd[0] ? (physical ? allocd = do_realpath(current_wd) : current_wd) : NULL; /* LINTED use of access */ if (p && access(p, R_OK) < 0) p = NULL; if (!p && !(p = allocd = ksh_get_wd())) { bi_errorf("%s: %s", "can't determine current directory", strerror(errno)); return (1); } shprintf("%s\n", p); afree(allocd, ATEMP); return (0); } static const char *s_ptr; static int s_get(void); static void s_put(int); int c_print(const char **wp) { #define PO_NL BIT(0) /* print newline */ #define PO_EXPAND BIT(1) /* expand backslash sequences */ #define PO_PMINUSMINUS BIT(2) /* print a -- argument */ #define PO_HIST BIT(3) /* print to history instead of stdout */ #define PO_COPROC BIT(4) /* printing to coprocess: block SIGPIPE */ int fd = 1, c; int flags = PO_EXPAND|PO_NL; const char *s, *emsg; XString xs; char *xp; if (wp[0][0] == 'e') { /* echo builtin */ wp++; if (Flag(FPOSIX) || Flag(FSH) || Flag(FAS_BUILTIN)) { /* Debian Policy 10.4 compliant "echo" builtin */ if (*wp && !strcmp(*wp, "-n")) { /* we recognise "-n" only as the first arg */ flags = 0; wp++; } else /* otherwise, we print everything as-is */ flags = PO_NL; } else { int nflags = flags; /** * a compromise between sysV and BSD echo commands: * escape sequences are enabled by default, and -n, * -e and -E are recognised if they appear in argu- * ments with no illegal options (ie, echo -nq will * print -nq). * Different from sysV echo since options are reco- * gnised, different from BSD echo since escape se- * quences are enabled by default. */ while ((s = *wp) && *s == '-' && s[1]) { while (*++s) if (*s == 'n') nflags &= ~PO_NL; else if (*s == 'e') nflags |= PO_EXPAND; else if (*s == 'E') nflags &= ~PO_EXPAND; else /* * bad option: don't use * nflags, print argument */ break; if (*s) break; wp++; flags = nflags; } } } else { int optc; const char *opts = "Rnprsu,"; while ((optc = ksh_getopt(wp, &builtin_opt, opts)) != -1) switch (optc) { case 'R': /* fake BSD echo command */ flags |= PO_PMINUSMINUS; flags &= ~PO_EXPAND; opts = "ne"; break; case 'e': flags |= PO_EXPAND; break; case 'n': flags &= ~PO_NL; break; case 'p': if ((fd = coproc_getfd(W_OK, &emsg)) < 0) { bi_errorf("%s: %s", "-p", emsg); return (1); } break; case 'r': flags &= ~PO_EXPAND; break; case 's': flags |= PO_HIST; break; case 'u': if (!*(s = builtin_opt.optarg)) fd = 0; else if ((fd = check_fd(s, W_OK, &emsg)) < 0) { bi_errorf("%s: %s: %s", "-u", s, emsg); return (1); } break; case '?': return (1); } if (!(builtin_opt.info & GI_MINUSMINUS)) { /* treat a lone - like -- */ if (wp[builtin_opt.optind] && ksh_isdash(wp[builtin_opt.optind])) builtin_opt.optind++; } else if (flags & PO_PMINUSMINUS) builtin_opt.optind--; wp += builtin_opt.optind; } Xinit(xs, xp, 128, ATEMP); while (*wp != NULL) { s = *wp; while ((c = *s++) != '\0') { Xcheck(xs, xp); if ((flags & PO_EXPAND) && c == '\\') { s_ptr = s; c = unbksl(false, s_get, s_put); s = s_ptr; if (c == -1) { /* rejected by generic function */ switch ((c = *s++)) { case 'c': flags &= ~PO_NL; /* AT&T brain damage */ continue; case '\0': s--; c = '\\'; break; default: Xput(xs, xp, '\\'); } } else if ((unsigned int)c > 0xFF) { /* generic function returned Unicode */ char ts[4]; ts[utf_wctomb(ts, c - 0x100)] = 0; for (c = 0; ts[c]; ++c) Xput(xs, xp, ts[c]); continue; } } Xput(xs, xp, c); } if (*++wp != NULL) Xput(xs, xp, ' '); } if (flags & PO_NL) Xput(xs, xp, '\n'); if (flags & PO_HIST) { Xput(xs, xp, '\0'); histsave(&source->line, Xstring(xs, xp), true, false); Xfree(xs, xp); } else { int len = Xlength(xs, xp); int opipe = 0; /* * Ensure we aren't killed by a SIGPIPE while writing to * a coprocess. AT&T ksh doesn't seem to do this (seems * to just check that the co-process is alive which is * not enough). */ if (coproc.write >= 0 && coproc.write == fd) { flags |= PO_COPROC; opipe = block_pipe(); } for (s = Xstring(xs, xp); len > 0; ) { if ((c = write(fd, s, len)) < 0) { if (flags & PO_COPROC) restore_pipe(opipe); if (errno == EINTR) { /* allow user to ^C out */ intrcheck(); if (flags & PO_COPROC) opipe = block_pipe(); continue; } return (1); } s += c; len -= c; } if (flags & PO_COPROC) restore_pipe(opipe); } return (0); } static int s_get(void) { return (*s_ptr++); } static void s_put(int c MKSH_A_UNUSED) { --s_ptr; } int c_whence(const char **wp) { struct tbl *tp; const char *id; bool pflag = false, vflag = false, Vflag = false; int rv = 0, optc, fcflags; bool iam_whence = wp[0][0] == 'w'; const char *opts = iam_whence ? "pv" : "pvV"; while ((optc = ksh_getopt(wp, &builtin_opt, opts)) != -1) switch (optc) { case 'p': pflag = true; break; case 'v': vflag = true; break; case 'V': Vflag = true; break; case '?': return (1); } wp += builtin_opt.optind; fcflags = FC_BI | FC_PATH | FC_FUNC; if (!iam_whence) { /* Note that -p on its own is deal with in comexec() */ if (pflag) fcflags |= FC_DEFPATH; /* * Convert command options to whence options - note that * command -pV uses a different path search than whence -v * or whence -pv. This should be considered a feature. */ vflag = Vflag; } if (pflag) fcflags &= ~(FC_BI | FC_FUNC); while ((vflag || rv == 0) && (id = *wp++) != NULL) { uint32_t h = 0; tp = NULL; if ((iam_whence || vflag) && !pflag) tp = ktsearch(&keywords, id, h = hash(id)); if (!tp && !pflag) { tp = ktsearch(&aliases, id, h ? h : hash(id)); if (tp && !(tp->flag & ISSET)) tp = NULL; } if (!tp) tp = findcom(id, fcflags); if (vflag || (tp->type != CALIAS && tp->type != CEXEC && tp->type != CTALIAS)) shf_puts(id, shl_stdout); if (vflag) switch (tp->type) { case CKEYWD: case CALIAS: case CFUNC: case CSHELL: shf_puts(" is a", shl_stdout); break; } switch (tp->type) { case CKEYWD: if (vflag) shf_puts(" reserved word", shl_stdout); break; case CALIAS: if (vflag) shprintf("n %s%s for ", (tp->flag & EXPORT) ? "exported " : null, Talias); if (!iam_whence && !vflag) shprintf("%s %s=", Talias, id); print_value_quoted(shl_stdout, tp->val.s); break; case CFUNC: if (vflag) { if (tp->flag & EXPORT) shf_puts("n exported", shl_stdout); if (tp->flag & TRACE) shf_puts(" traced", shl_stdout); if (!(tp->flag & ISSET)) { shf_puts(" undefined", shl_stdout); if (tp->u.fpath) shprintf(" (autoload from %s)", tp->u.fpath); } shf_puts(T_function, shl_stdout); } break; case CSHELL: if (vflag) shprintf("%s %s %s", (tp->flag & SPEC_BI) ? " special" : null, "shell", Tbuiltin); break; case CTALIAS: case CEXEC: if (tp->flag & ISSET) { if (vflag) { shf_puts(" is ", shl_stdout); if (tp->type == CTALIAS) shprintf("a tracked %s%s for ", (tp->flag & EXPORT) ? "exported " : null, Talias); } shf_puts(tp->val.s, shl_stdout); } else { if (vflag) shprintf(" %s\n", "not found"); rv = 1; } break; default: shprintf("%s is *GOK*", id); break; } if (vflag || !rv) shf_putc('\n', shl_stdout); } return (rv); } /* Deal with command -vV - command -p dealt with in comexec() */ int c_command(const char **wp) { /* * Let c_whence do the work. Note that c_command() must be * a distinct function from c_whence() (tested in comexec()). */ return (c_whence(wp)); } /* typeset, global, export, and readonly */ int c_typeset(const char **wp) { struct block *l; struct tbl *vp, **p; uint32_t fset = 0, fclr = 0, flag; int thing = 0, field = 0, base = 0, optc; const char *opts; const char *fieldstr = NULL, *basestr = NULL; bool localv = false, func = false, pflag = false, istset = true; switch (**wp) { /* export */ case 'e': fset |= EXPORT; istset = false; break; /* readonly */ case 'r': fset |= RDONLY; istset = false; break; /* set */ case 's': /* called with 'typeset -' */ break; /* typeset */ case 't': localv = true; break; } /* see comment below regarding possible opions */ opts = istset ? "L#R#UZ#afi#lnprtux" : "p"; builtin_opt.flags |= GF_PLUSOPT; /* * AT&T ksh seems to have 0-9 as options which are multiplied * to get a number that is used with -L, -R, -Z or -i (eg, -1R2 * sets right justify in a field of 12). This allows options * to be grouped in an order (eg, -Lu12), but disallows -i8 -L3 and * does not allow the number to be specified as a separate argument * Here, the number must follow the RLZi option, but is optional * (see the # kludge in ksh_getopt()). */ while ((optc = ksh_getopt(wp, &builtin_opt, opts)) != -1) { flag = 0; switch (optc) { case 'L': flag = LJUST; fieldstr = builtin_opt.optarg; break; case 'R': flag = RJUST; fieldstr = builtin_opt.optarg; break; case 'U': /* * AT&T ksh uses u, but this conflicts with * upper/lower case. If this option is changed, * need to change the -U below as well */ flag = INT_U; break; case 'Z': flag = ZEROFIL; fieldstr = builtin_opt.optarg; break; case 'a': /* * this is supposed to set (-a) or unset (+a) the * indexed array attribute; it does nothing on an * existing regular string or indexed array though */ break; case 'f': func = true; break; case 'i': flag = INTEGER; basestr = builtin_opt.optarg; break; case 'l': flag = LCASEV; break; case 'n': set_refflag = (builtin_opt.info & GI_PLUS) ? SRF_DISABLE : SRF_ENABLE; break; /* export, readonly: POSIX -p flag */ case 'p': /* typeset: show values as well */ pflag = true; if (istset) continue; break; case 'r': flag = RDONLY; break; case 't': flag = TRACE; break; case 'u': /* upper case / autoload */ flag = UCASEV_AL; break; case 'x': flag = EXPORT; break; case '?': errout: set_refflag = SRF_NOP; return (1); } if (builtin_opt.info & GI_PLUS) { fclr |= flag; fset &= ~flag; thing = '+'; } else { fset |= flag; fclr &= ~flag; thing = '-'; } } if (fieldstr && !bi_getn(fieldstr, &field)) goto errout; if (basestr && (!bi_getn(basestr, &base) || base < 1 || base > 36)) { bi_errorf("%s: %s", "bad integer base", basestr); goto errout; } if (!(builtin_opt.info & GI_MINUSMINUS) && wp[builtin_opt.optind] && (wp[builtin_opt.optind][0] == '-' || wp[builtin_opt.optind][0] == '+') && wp[builtin_opt.optind][1] == '\0') { thing = wp[builtin_opt.optind][0]; builtin_opt.optind++; } if (func && (((fset|fclr) & ~(TRACE|UCASEV_AL|EXPORT)) || set_refflag != SRF_NOP)) { bi_errorf("only -t, -u and -x options may be used with -f"); goto errout; } if (wp[builtin_opt.optind]) { /* * Take care of exclusions. * At this point, flags in fset are cleared in fclr and vice * versa. This property should be preserved. */ if (fset & LCASEV) /* LCASEV has priority over UCASEV_AL */ fset &= ~UCASEV_AL; if (fset & LJUST) /* LJUST has priority over RJUST */ fset &= ~RJUST; if ((fset & (ZEROFIL|LJUST)) == ZEROFIL) { /* -Z implies -ZR */ fset |= RJUST; fclr &= ~RJUST; } /* * Setting these attributes clears the others, unless they * are also set in this command */ if ((fset & (LJUST | RJUST | ZEROFIL | UCASEV_AL | LCASEV | INTEGER | INT_U | INT_L)) || set_refflag != SRF_NOP) fclr |= ~fset & (LJUST | RJUST | ZEROFIL | UCASEV_AL | LCASEV | INTEGER | INT_U | INT_L); } /* set variables and attributes */ if (wp[builtin_opt.optind]) { int i, rv = 0; struct tbl *f; if (localv && !func) fset |= LOCAL; for (i = builtin_opt.optind; wp[i]; i++) { if (func) { f = findfunc(wp[i], hash(wp[i]), tobool(fset & UCASEV_AL)); if (!f) { /* AT&T ksh does ++rv: bogus */ rv = 1; continue; } if (fset | fclr) { f->flag |= fset; f->flag &= ~fclr; } else { fpFUNCTf(shl_stdout, 0, tobool(f->flag & FKSH), wp[i], f->val.t); shf_putc('\n', shl_stdout); } } else if (!typeset(wp[i], fset, fclr, field, base)) { bi_errorf("%s: %s", wp[i], "not identifier"); goto errout; } } set_refflag = SRF_NOP; return (rv); } /* list variables and attributes */ /* no difference at this point.. */ flag = fset | fclr; if (func) { for (l = e->loc; l; l = l->next) { for (p = ktsort(&l->funs); (vp = *p++); ) { if (flag && (vp->flag & flag) == 0) continue; if (thing == '-') fpFUNCTf(shl_stdout, 0, tobool(vp->flag & FKSH), vp->name, vp->val.t); else shf_puts(vp->name, shl_stdout); shf_putc('\n', shl_stdout); } } } else { for (l = e->loc; l; l = l->next) { for (p = ktsort(&l->vars); (vp = *p++); ) { struct tbl *tvp; bool any_set = false; /* * See if the parameter is set (for arrays, if any * element is set). */ for (tvp = vp; tvp; tvp = tvp->u.array) if (tvp->flag & ISSET) { any_set = true; break; } /* * Check attributes - note that all array elements * have (should have?) the same attributes, so checking * the first is sufficient. * * Report an unset param only if the user has * explicitly given it some attribute (like export); * otherwise, after "echo $FOO", we would report FOO... */ if (!any_set && !(vp->flag & USERATTRIB)) continue; if (flag && (vp->flag & flag) == 0) continue; for (; vp; vp = vp->u.array) { /* * Ignore array elements that aren't * set unless there are no set elements, * in which case the first is reported on */ if ((vp->flag&ARRAY) && any_set && !(vp->flag & ISSET)) continue; /* no arguments */ if (thing == 0 && flag == 0) { /* * AT&T ksh prints things * like export, integer, * leftadj, zerofill, etc., * but POSIX says must * be suitable for re-entry... */ shf_puts("typeset ", shl_stdout); if (((vp->flag&(ARRAY|ASSOC))==ASSOC)) shprintf("%s ", "-n"); if ((vp->flag&INTEGER)) shprintf("%s ", "-i"); if ((vp->flag&EXPORT)) shprintf("%s ", "-x"); if ((vp->flag&RDONLY)) shprintf("%s ", "-r"); if ((vp->flag&TRACE)) shprintf("%s ", "-t"); if ((vp->flag&LJUST)) shprintf("-L%d ", vp->u2.field); if ((vp->flag&RJUST)) shprintf("-R%d ", vp->u2.field); if ((vp->flag&ZEROFIL)) shprintf("%s ", "-Z"); if ((vp->flag&LCASEV)) shprintf("%s ", "-l"); if ((vp->flag&UCASEV_AL)) shprintf("%s ", "-u"); if ((vp->flag&INT_U)) shprintf("%s ", "-U"); shf_puts(vp->name, shl_stdout); if (pflag) { char *s = str_val(vp); shf_putc('=', shl_stdout); /* * AT&T ksh can't have * justified integers... */ if ((vp->flag & (INTEGER|LJUST|RJUST)) == INTEGER) shf_puts(s, shl_stdout); else print_value_quoted(shl_stdout, s); } shf_putc('\n', shl_stdout); if (vp->flag & ARRAY) break; } else { if (pflag) shf_puts(istset ? "typeset " : (flag & EXPORT) ? "export " : "readonly ", shl_stdout); if ((vp->flag&ARRAY) && any_set) shprintf("%s[%lu]", vp->name, arrayindex(vp)); else shf_puts(vp->name, shl_stdout); if (thing == '-' && (vp->flag&ISSET)) { char *s = str_val(vp); shf_putc('=', shl_stdout); /* * AT&T ksh can't have * justified integers... */ if ((vp->flag & (INTEGER|LJUST|RJUST)) == INTEGER) shf_puts(s, shl_stdout); else print_value_quoted(shl_stdout, s); } shf_putc('\n', shl_stdout); } /* * Only report first 'element' of an array with * no set elements. */ if (!any_set) break; } } } } set_refflag = SRF_NOP; return (0); } int c_alias(const char **wp) { struct table *t = &aliases; int rv = 0, prefix = 0; bool rflag = false, tflag, Uflag = false, pflag = false; uint32_t xflag = 0; int optc; builtin_opt.flags |= GF_PLUSOPT; while ((optc = ksh_getopt(wp, &builtin_opt, "dprtUx")) != -1) { prefix = builtin_opt.info & GI_PLUS ? '+' : '-'; switch (optc) { case 'd': #ifdef MKSH_NOPWNAM t = NULL; /* fix "alias -dt" */ #else t = &homedirs; #endif break; case 'p': pflag = true; break; case 'r': rflag = true; break; case 't': t = &taliases; break; case 'U': /* * kludge for tracked alias initialization * (don't do a path search, just make an entry) */ Uflag = true; break; case 'x': xflag = EXPORT; break; case '?': return (1); } } #ifdef MKSH_NOPWNAM if (t == NULL) return (0); #endif wp += builtin_opt.optind; if (!(builtin_opt.info & GI_MINUSMINUS) && *wp && (wp[0][0] == '-' || wp[0][0] == '+') && wp[0][1] == '\0') { prefix = wp[0][0]; wp++; } tflag = t == &taliases; /* "hash -r" means reset all the tracked aliases.. */ if (rflag) { static const char *args[] = { Tunalias, "-ta", NULL }; if (!tflag || *wp) { shprintf("%s: -r flag can only be used with -t" " and without arguments\n", Talias); return (1); } ksh_getopt_reset(&builtin_opt, GF_ERROR); return (c_unalias(args)); } if (*wp == NULL) { struct tbl *ap, **p; for (p = ktsort(t); (ap = *p++) != NULL; ) if ((ap->flag & (ISSET|xflag)) == (ISSET|xflag)) { if (pflag) shprintf("%s ", Talias); shf_puts(ap->name, shl_stdout); if (prefix != '+') { shf_putc('=', shl_stdout); print_value_quoted(shl_stdout, ap->val.s); } shf_putc('\n', shl_stdout); } } for (; *wp != NULL; wp++) { const char *alias = *wp, *val, *newval; char *xalias = NULL; struct tbl *ap; uint32_t h; if ((val = cstrchr(alias, '='))) { strndupx(xalias, alias, val++ - alias, ATEMP); alias = xalias; } h = hash(alias); if (val == NULL && !tflag && !xflag) { ap = ktsearch(t, alias, h); if (ap != NULL && (ap->flag&ISSET)) { if (pflag) shprintf("%s ", Talias); shf_puts(ap->name, shl_stdout); if (prefix != '+') { shf_putc('=', shl_stdout); print_value_quoted(shl_stdout, ap->val.s); } shf_putc('\n', shl_stdout); } else { shprintf("%s %s %s\n", alias, Talias, "not found"); rv = 1; } continue; } ap = ktenter(t, alias, h); ap->type = tflag ? CTALIAS : CALIAS; /* Are we setting the value or just some flags? */ if ((val && !tflag) || (!val && tflag && !Uflag)) { if (ap->flag&ALLOC) { ap->flag &= ~(ALLOC|ISSET); afree(ap->val.s, APERM); } /* ignore values for -t (AT&T ksh does this) */ newval = tflag ? search_path(alias, path, X_OK, NULL) : val; if (newval) { strdupx(ap->val.s, newval, APERM); ap->flag |= ALLOC|ISSET; } else ap->flag &= ~ISSET; } ap->flag |= DEFINED; if (prefix == '+') ap->flag &= ~xflag; else ap->flag |= xflag; afree(xalias, ATEMP); } return (rv); } int c_unalias(const char **wp) { struct table *t = &aliases; struct tbl *ap; int optc, rv = 0; bool all = false; while ((optc = ksh_getopt(wp, &builtin_opt, "adt")) != -1) switch (optc) { case 'a': all = true; break; case 'd': #ifdef MKSH_NOPWNAM /* fix "unalias -dt" */ t = NULL; #else t = &homedirs; #endif break; case 't': t = &taliases; break; case '?': return (1); } #ifdef MKSH_NOPWNAM if (t == NULL) return (0); #endif wp += builtin_opt.optind; for (; *wp != NULL; wp++) { ap = ktsearch(t, *wp, hash(*wp)); if (ap == NULL) { /* POSIX */ rv = 1; continue; } if (ap->flag&ALLOC) { ap->flag &= ~(ALLOC|ISSET); afree(ap->val.s, APERM); } ap->flag &= ~(DEFINED|ISSET|EXPORT); } if (all) { struct tstate ts; for (ktwalk(&ts, t); (ap = ktnext(&ts)); ) { if (ap->flag&ALLOC) { ap->flag &= ~(ALLOC|ISSET); afree(ap->val.s, APERM); } ap->flag &= ~(DEFINED|ISSET|EXPORT); } } return (rv); } int c_let(const char **wp) { int rv = 1; mksh_ari_t val; if (wp[1] == NULL) /* AT&T ksh does this */ bi_errorf("no arguments"); else for (wp++; *wp; wp++) if (!evaluate(*wp, &val, KSH_RETURN_ERROR, true)) { /* distinguish error from zero result */ rv = 2; break; } else rv = val == 0; return (rv); } int c_jobs(const char **wp) { int optc, flag = 0, nflag = 0, rv = 0; while ((optc = ksh_getopt(wp, &builtin_opt, "lpnz")) != -1) switch (optc) { case 'l': flag = 1; break; case 'p': flag = 2; break; case 'n': nflag = 1; break; case 'z': /* debugging: print zombies */ nflag = -1; break; case '?': return (1); } wp += builtin_opt.optind; if (!*wp) { if (j_jobs(NULL, flag, nflag)) rv = 1; } else { for (; *wp; wp++) if (j_jobs(*wp, flag, nflag)) rv = 1; } return (rv); } #ifndef MKSH_UNEMPLOYED int c_fgbg(const char **wp) { bool bg = strcmp(*wp, "bg") == 0; int rv = 0; if (!Flag(FMONITOR)) { bi_errorf("job control not enabled"); return (1); } if (ksh_getopt(wp, &builtin_opt, null) == '?') return (1); wp += builtin_opt.optind; if (*wp) for (; *wp; wp++) rv = j_resume(*wp, bg); else rv = j_resume("%%", bg); return (bg ? 0 : rv); } #endif /* format a single kill item */ static char * kill_fmt_entry(char *buf, size_t buflen, int i, const void *arg) { const struct kill_info *ki = (const struct kill_info *)arg; i++; shf_snprintf(buf, buflen, "%*d %*s %s", ki->num_width, i, ki->name_width, sigtraps[i].name, sigtraps[i].mess); return (buf); } int c_kill(const char **wp) { Trap *t = NULL; const char *p; bool lflag = false; int i, n, rv, sig; /* assume old style options if -digits or -UPPERCASE */ if ((p = wp[1]) && *p == '-' && (ksh_isdigit(p[1]) || ksh_isupper(p[1]))) { if (!(t = gettrap(p + 1, false))) { bi_errorf("bad signal '%s'", p + 1); return (1); } i = (wp[2] && strcmp(wp[2], "--") == 0) ? 3 : 2; } else { int optc; while ((optc = ksh_getopt(wp, &builtin_opt, "ls:")) != -1) switch (optc) { case 'l': lflag = true; break; case 's': if (!(t = gettrap(builtin_opt.optarg, true))) { bi_errorf("bad signal '%s'", builtin_opt.optarg); return (1); } break; case '?': return (1); } i = builtin_opt.optind; } if ((lflag && t) || (!wp[i] && !lflag)) { #ifndef MKSH_SMALL shf_puts("usage:\tkill [-s signame | -signum | -signame]" " { job | pid | pgrp } ...\n" "\tkill -l [exit_status ...]\n", shl_out); #endif bi_errorfz(); return (1); } if (lflag) { if (wp[i]) { for (; wp[i]; i++) { if (!bi_getn(wp[i], &n)) return (1); if (n > 128 && n < 128 + NSIG) n -= 128; if (n > 0 && n < NSIG) shprintf("%s\n", sigtraps[n].name); else shprintf("%d\n", n); } } else { ssize_t w, mess_cols, mess_octs; int j; struct kill_info ki; for (j = NSIG, ki.num_width = 1; j >= 10; j /= 10) ki.num_width++; ki.name_width = mess_cols = mess_octs = 0; for (j = 0; j < NSIG; j++) { w = strlen(sigtraps[j].name); if (w > ki.name_width) ki.name_width = w; w = strlen(sigtraps[j].mess); if (w > mess_octs) mess_octs = w; w = utf_mbswidth(sigtraps[j].mess); if (w > mess_cols) mess_cols = w; } print_columns(shl_stdout, NSIG - 1, kill_fmt_entry, (void *)&ki, ki.num_width + 1 + ki.name_width + 1 + mess_octs, ki.num_width + 1 + ki.name_width + 1 + mess_cols, true); } return (0); } rv = 0; sig = t ? t->signal : SIGTERM; for (; (p = wp[i]); i++) { if (*p == '%') { if (j_kill(p, sig)) rv = 1; } else if (!getn(p, &n)) { bi_errorf("%s: %s", p, "arguments must be jobs or process IDs"); rv = 1; } else { if (mksh_kill(n, sig) < 0) { bi_errorf("%s: %s", p, strerror(errno)); rv = 1; } } } return (rv); } void getopts_reset(int val) { if (val >= 1) { ksh_getopt_reset(&user_opt, GF_NONAME | GF_PLUSOPT); user_opt.optind = user_opt.uoptind = val; } } int c_getopts(const char **wp) { int argc, optc, rv; const char *opts, *var; char buf[3]; struct tbl *vq, *voptarg; if (ksh_getopt(wp, &builtin_opt, null) == '?') return (1); wp += builtin_opt.optind; opts = *wp++; if (!opts) { bi_errorf("missing %s argument", "options"); return (1); } var = *wp++; if (!var) { bi_errorf("missing %s argument", "name"); return (1); } if (!*var || *skip_varname(var, true)) { bi_errorf("%s: %s", var, "is not an identifier"); return (1); } if (e->loc->next == NULL) { internal_warningf("%s: %s", "c_getopts", "no argv"); return (1); } /* Which arguments are we parsing... */ if (*wp == NULL) wp = e->loc->next->argv; else *--wp = e->loc->next->argv[0]; /* Check that our saved state won't cause a core dump... */ for (argc = 0; wp[argc]; argc++) ; if (user_opt.optind > argc || (user_opt.p != 0 && user_opt.p > strlen(wp[user_opt.optind - 1]))) { bi_errorf("arguments changed since last call"); return (1); } user_opt.optarg = NULL; optc = ksh_getopt(wp, &user_opt, opts); if (optc >= 0 && optc != '?' && (user_opt.info & GI_PLUS)) { buf[0] = '+'; buf[1] = optc; buf[2] = '\0'; } else { /* * POSIX says var is set to ? at end-of-options, AT&T ksh * sets it to null - we go with POSIX... */ buf[0] = optc < 0 ? '?' : optc; buf[1] = '\0'; } /* AT&T ksh93 in fact does change OPTIND for unknown options too */ user_opt.uoptind = user_opt.optind; voptarg = global("OPTARG"); /* AT&T ksh clears ro and int */ voptarg->flag &= ~RDONLY; /* Paranoia: ensure no bizarre results. */ if (voptarg->flag & INTEGER) typeset("OPTARG", 0, INTEGER, 0, 0); if (user_opt.optarg == NULL) unset(voptarg, 1); else /* This can't fail (have cleared readonly/integer) */ setstr(voptarg, user_opt.optarg, KSH_RETURN_ERROR); rv = 0; vq = global(var); /* Error message already printed (integer, readonly) */ if (!setstr(vq, buf, KSH_RETURN_ERROR)) rv = 2; if (Flag(FEXPORT)) typeset(var, EXPORT, 0, 0, 0); return (optc < 0 ? 1 : rv); } int c_bind(const char **wp) { int optc, rv = 0; #ifndef MKSH_SMALL bool macro = false; #endif bool list = false; const char *cp; char *up; while ((optc = ksh_getopt(wp, &builtin_opt, #ifndef MKSH_SMALL "lm" #else "l" #endif )) != -1) switch (optc) { case 'l': list = true; break; #ifndef MKSH_SMALL case 'm': macro = true; break; #endif case '?': return (1); } wp += builtin_opt.optind; if (*wp == NULL) /* list all */ rv = x_bind(NULL, NULL, #ifndef MKSH_SMALL false, #endif list); for (; *wp != NULL; wp++) { if ((cp = cstrchr(*wp, '=')) == NULL) up = NULL; else { strdupx(up, *wp, ATEMP); up[cp++ - *wp] = '\0'; } if (x_bind(up ? up : *wp, cp, #ifndef MKSH_SMALL macro, #endif false)) rv = 1; afree(up, ATEMP); } return (rv); } int c_shift(const char **wp) { struct block *l = e->loc; int n; mksh_ari_t val; const char *arg; if (ksh_getopt(wp, &builtin_opt, null) == '?') return (1); arg = wp[builtin_opt.optind]; if (arg) { evaluate(arg, &val, KSH_UNWIND_ERROR, false); n = val; } else n = 1; if (n < 0) { bi_errorf("%s: %s", arg, "bad number"); return (1); } if (l->argc < n) { bi_errorf("nothing to shift"); return (1); } l->argv[n] = l->argv[0]; l->argv += n; l->argc -= n; return (0); } int c_umask(const char **wp) { int i, optc; const char *cp; bool symbolic = false; mode_t old_umask; while ((optc = ksh_getopt(wp, &builtin_opt, "S")) != -1) switch (optc) { case 'S': symbolic = true; break; case '?': return (1); } cp = wp[builtin_opt.optind]; if (cp == NULL) { old_umask = umask((mode_t)0); umask(old_umask); if (symbolic) { char buf[18], *p; int j; old_umask = ~old_umask; p = buf; for (i = 0; i < 3; i++) { *p++ = "ugo"[i]; *p++ = '='; for (j = 0; j < 3; j++) if (old_umask & (1 << (8 - (3*i + j)))) *p++ = "rwx"[j]; *p++ = ','; } p[-1] = '\0'; shprintf("%s\n", buf); } else shprintf("%#3.3o\n", (unsigned int)old_umask); } else { mode_t new_umask; if (ksh_isdigit(*cp)) { for (new_umask = 0; *cp >= '0' && *cp <= '7'; cp++) new_umask = new_umask * 8 + (*cp - '0'); if (*cp) { bi_errorf("bad number"); return (1); } } else { /* symbolic format */ int positions, new_val; char op; old_umask = umask((mode_t)0); /* in case of error */ umask(old_umask); old_umask = ~old_umask; new_umask = old_umask; positions = 0; while (*cp) { while (*cp && vstrchr("augo", *cp)) switch (*cp++) { case 'a': positions |= 0111; break; case 'u': positions |= 0100; break; case 'g': positions |= 0010; break; case 'o': positions |= 0001; break; } if (!positions) /* default is a */ positions = 0111; if (!vstrchr("=+-", op = *cp)) break; cp++; new_val = 0; while (*cp && vstrchr("rwxugoXs", *cp)) switch (*cp++) { case 'r': new_val |= 04; break; case 'w': new_val |= 02; break; case 'x': new_val |= 01; break; case 'u': new_val |= old_umask >> 6; break; case 'g': new_val |= old_umask >> 3; break; case 'o': new_val |= old_umask >> 0; break; case 'X': if (old_umask & 0111) new_val |= 01; break; case 's': /* ignored */ break; } new_val = (new_val & 07) * positions; switch (op) { case '-': new_umask &= ~new_val; break; case '=': new_umask = new_val | (new_umask & ~(positions * 07)); break; case '+': new_umask |= new_val; } if (*cp == ',') { positions = 0; cp++; } else if (!vstrchr("=+-", *cp)) break; } if (*cp) { bi_errorf("bad mask"); return (1); } new_umask = ~new_umask; } umask(new_umask); } return (0); } int c_dot(const char **wp) { const char *file, *cp, **argv; int argc, i, errcode; if (ksh_getopt(wp, &builtin_opt, null) == '?') return (1); if ((cp = wp[builtin_opt.optind]) == NULL) { bi_errorf("missing argument"); return (1); } if ((file = search_path(cp, path, R_OK, &errcode)) == NULL) { bi_errorf("%s: %s", cp, strerror(errcode)); return (1); } /* Set positional parameters? */ if (wp[builtin_opt.optind + 1]) { argv = wp + builtin_opt.optind; /* preserve $0 */ argv[0] = e->loc->argv[0]; for (argc = 0; argv[argc + 1]; argc++) ; } else { argc = 0; argv = NULL; } if ((i = include(file, argc, argv, 0)) < 0) { /* should not happen */ bi_errorf("%s: %s", cp, strerror(errno)); return (1); } return (i); } int c_wait(const char **wp) { int rv = 0, sig; if (ksh_getopt(wp, &builtin_opt, null) == '?') return (1); wp += builtin_opt.optind; if (*wp == NULL) { while (waitfor(NULL, &sig) >= 0) ; rv = sig; } else { for (; *wp; wp++) rv = waitfor(*wp, &sig); if (rv < 0) /* magic exit code: bad job-id */ rv = sig ? sig : 127; } return (rv); } static char REPLY[] = "REPLY"; int c_read(const char **wp) { #define is_ifsws(c) (ctype((c), C_IFS) && ctype((c), C_IFSWS)) int c, fd = 0, rv = 0, lastparm = 0; bool savehist = false, intoarray = false, aschars = false; bool rawmode = false, expanding = false; enum { LINES, BYTES, UPTO, READALL } readmode = LINES; char delim = '\n'; size_t bytesleft = 128, bytesread; struct tbl *vp /* FU gcc */ = NULL, *vq; char *cp, *allocd = NULL, *xp; const char *ccp; XString xs; ptrdiff_t xsave = 0; struct termios tios; bool restore_tios = false; #if HAVE_SELECT bool hastimeout = false; struct timeval tv, tvlim; #define c_read_opts "Aad:N:n:prst:u," #else #define c_read_opts "Aad:N:n:prsu," #endif while ((c = ksh_getopt(wp, &builtin_opt, c_read_opts)) != -1) switch (c) { case 'a': aschars = true; /* FALLTHROUGH */ case 'A': intoarray = true; break; case 'd': delim = builtin_opt.optarg[0]; break; case 'N': case 'n': readmode = c == 'N' ? BYTES : UPTO; if (!bi_getn(builtin_opt.optarg, &c)) return (2); if (c == -1) { readmode = READALL; bytesleft = 1024; } else bytesleft = (unsigned int)c; break; case 'p': if ((fd = coproc_getfd(R_OK, &ccp)) < 0) { bi_errorf("%s: %s", "-p", ccp); return (2); } break; case 'r': rawmode = true; break; case 's': savehist = true; break; #if HAVE_SELECT case 't': if (parse_usec(builtin_opt.optarg, &tv)) { bi_errorf("%s: %s '%s'", Tsynerr, strerror(errno), builtin_opt.optarg); return (2); } hastimeout = true; break; #endif case 'u': if (!builtin_opt.optarg[0]) fd = 0; else if ((fd = check_fd(builtin_opt.optarg, R_OK, &ccp)) < 0) { bi_errorf("%s: %s: %s", "-u", builtin_opt.optarg, ccp); return (2); } break; case '?': return (2); } wp += builtin_opt.optind; if (*wp == NULL) *--wp = REPLY; if (intoarray && wp[1] != NULL) { bi_errorf("too many arguments"); return (2); } if ((ccp = cstrchr(*wp, '?')) != NULL) { strdupx(allocd, *wp, ATEMP); allocd[ccp - *wp] = '\0'; *wp = allocd; if (isatty(fd)) { /* * AT&T ksh says it prints prompt on fd if it's open * for writing and is a tty, but it doesn't do it * (it also doesn't check the interactive flag, * as is indicated in the Korn Shell book). */ shf_puts(ccp + 1, shl_out); shf_flush(shl_out); } } Xinit(xs, xp, bytesleft, ATEMP); if (readmode == LINES) bytesleft = 1; else if (isatty(fd)) { x_mkraw(fd, &tios, true); restore_tios = true; } #if HAVE_SELECT if (hastimeout) { gettimeofday(&tvlim, NULL); timeradd(&tvlim, &tv, &tvlim); } #endif c_read_readloop: #if HAVE_SELECT if (hastimeout) { fd_set fdset; FD_ZERO(&fdset); FD_SET(fd, &fdset); gettimeofday(&tv, NULL); timersub(&tvlim, &tv, &tv); if (tv.tv_sec < 0) { /* timeout expired globally */ rv = 1; goto c_read_out; } switch (select(fd + 1, &fdset, NULL, NULL, &tv)) { case 1: break; case 0: /* timeout expired for this call */ rv = 1; goto c_read_out; default: bi_errorf("%s: %s", Tselect, strerror(errno)); rv = 2; goto c_read_out; } } #endif bytesread = blocking_read(fd, xp, bytesleft); if (bytesread == (size_t)-1) { /* interrupted */ if (errno == EINTR && fatal_trap_check()) { /* * Was the offending signal one that would * normally kill a process? If so, pretend * the read was killed. */ rv = 2; goto c_read_out; } /* just ignore the signal */ goto c_read_readloop; } switch (readmode) { case READALL: if (bytesread == 0) { /* end of file reached */ rv = 1; goto c_read_readdone; } xp += bytesread; XcheckN(xs, xp, bytesleft); break; case UPTO: if (bytesread == 0) /* end of file reached */ rv = 1; xp += bytesread; goto c_read_readdone; case BYTES: if (bytesread == 0) { /* end of file reached */ rv = 1; xp = Xstring(xs, xp); goto c_read_readdone; } xp += bytesread; if ((bytesleft -= bytesread) == 0) goto c_read_readdone; break; case LINES: if (bytesread == 0) { /* end of file reached */ rv = 1; goto c_read_readdone; } if ((c = *xp) == '\0' && !aschars && delim != '\0') { /* skip any read NULs unless delimiter */ break; } if (expanding) { expanding = false; if (c == delim) { if (Flag(FTALKING_I) && isatty(fd)) { /* * set prompt in case this is * called from .profile or $ENV */ set_prompt(PS2, NULL); pprompt(prompt, 0); } /* drop the backslash */ --xp; /* and the delimiter */ break; } } else if (c == delim) { goto c_read_readdone; } else if (!rawmode && c == '\\') { expanding = true; } Xcheck(xs, xp); ++xp; break; } goto c_read_readloop; c_read_readdone: bytesread = Xlength(xs, xp); Xput(xs, xp, '\0'); /*- * state: we finished reading the input and NUL terminated it * Xstring(xs, xp) -> xp-1 = input string without trailing delim * rv = 1 if EOF, 0 otherwise (errors handled already) */ if (rv == 1) { /* clean up coprocess if needed, on EOF */ coproc_read_close(fd); if (readmode == READALL) /* EOF is no error here */ rv = 0; } if (savehist) histsave(&source->line, Xstring(xs, xp), true, false); ccp = cp = Xclose(xs, xp); expanding = false; XinitN(xs, 128, ATEMP); if (intoarray) { vp = global(*wp); if (vp->flag & RDONLY) { c_read_splitro: bi_errorf("read-only: %s", *wp); c_read_spliterr: rv = 2; afree(cp, ATEMP); goto c_read_out; } /* exporting an array is currently pointless */ unset(vp, 1); /* counter for array index */ c = 0; } if (!aschars) { /* skip initial IFS whitespace */ while (bytesread && is_ifsws(*ccp)) { ++ccp; --bytesread; } /* trim trailing IFS whitespace */ while (bytesread && is_ifsws(ccp[bytesread - 1])) { --bytesread; } } c_read_splitloop: xp = Xstring(xs, xp); /* generate next word */ if (!bytesread) { /* no more input */ if (intoarray) goto c_read_splitdone; /* zero out next parameters */ goto c_read_gotword; } if (aschars) { Xput(xs, xp, '1'); Xput(xs, xp, '#'); bytesleft = utf_ptradj(ccp); while (bytesleft && bytesread) { *xp++ = *ccp++; --bytesleft; --bytesread; } if (xp[-1] == '\0') { xp[-1] = '0'; xp[-3] = '2'; } goto c_read_gotword; } if (!intoarray && wp[1] == NULL) lastparm = 1; c_read_splitlast: /* copy until IFS character */ while (bytesread) { char ch; ch = *ccp; if (expanding) { expanding = false; goto c_read_splitcopy; } else if (ctype(ch, C_IFS)) { break; } else if (!rawmode && ch == '\\') { expanding = true; } else { c_read_splitcopy: Xcheck(xs, xp); Xput(xs, xp, ch); } ++ccp; --bytesread; } xsave = Xsavepos(xs, xp); /* copy word delimiter: IFSWS+IFS,IFSWS */ while (bytesread) { char ch; ch = *ccp; if (!ctype(ch, C_IFS)) break; Xcheck(xs, xp); Xput(xs, xp, ch); ++ccp; --bytesread; if (!ctype(ch, C_IFSWS)) break; } while (bytesread && is_ifsws(*ccp)) { Xcheck(xs, xp); Xput(xs, xp, *ccp); ++ccp; --bytesread; } /* if no more parameters, rinse and repeat */ if (lastparm && bytesread) { ++lastparm; goto c_read_splitlast; } /* get rid of the delimiter unless we pack the rest */ if (lastparm < 2) xp = Xrestpos(xs, xp, xsave); c_read_gotword: Xput(xs, xp, '\0'); if (intoarray) { vq = arraysearch(vp, c++); } else { vq = global(*wp); /* must be checked before exporting */ if (vq->flag & RDONLY) goto c_read_splitro; if (Flag(FEXPORT)) typeset(*wp, EXPORT, 0, 0, 0); } if (!setstr(vq, Xstring(xs, xp), KSH_RETURN_ERROR)) goto c_read_spliterr; if (aschars) { setint_v(vq, vq, false); /* protect from UTFMODE changes */ vq->type = 0; } if (intoarray || *++wp != NULL) goto c_read_splitloop; c_read_splitdone: /* free up */ afree(cp, ATEMP); c_read_out: afree(allocd, ATEMP); Xfree(xs, xp); if (restore_tios) tcsetattr(fd, TCSADRAIN, &tios); return (rv); #undef is_ifsws } int c_eval(const char **wp) { struct source *s, *saves = source; unsigned char savef; int rv; if (ksh_getopt(wp, &builtin_opt, null) == '?') return (1); s = pushs(SWORDS, ATEMP); s->u.strv = wp + builtin_opt.optind; /*- * The following code handles the case where the command is * empty due to failed command substitution, for example by * eval "$(false)" * This has historically returned 1 by AT&T ksh88. In this * case, shell() will not set or change exstat because the * compiled tree is empty, so it will use the value we pass * from subst_exstat, which is cleared in execute(), so it * should have been 0 if there were no substitutions. * * POSIX however says we don't do this, even though it is * traditionally done. AT&T ksh93 agrees with POSIX, so we * do. The following is an excerpt from SUSv4 [1003.2-2008]: * * 2.9.1: Simple Commands * ... If there is a command name, execution shall * continue as described in 2.9.1.1 [Command Search * and Execution]. If there is no command name, but * the command contained a command substitution, the * command shall complete with the exit status of the * last command substitution performed. * 2.9.1.1: Command Search and Execution * (1) a. If the command name matches the name of a * special built-in utility, that special built-in * utility shall be invoked. * 2.14.5: eval * If there are no arguments, or only null arguments, * eval shall return a zero exit status; ... */ /* exstat = subst_exstat; */ /* AT&T ksh88 */ exstat = 0; /* SUSv4 */ savef = Flag(FERREXIT); Flag(FERREXIT) = 0; rv = shell(s, false); Flag(FERREXIT) = savef; source = saves; afree(s, ATEMP); return (rv); } int c_trap(const char **wp) { int i; const char *s; Trap *p; if (ksh_getopt(wp, &builtin_opt, null) == '?') return (1); wp += builtin_opt.optind; if (*wp == NULL) { for (p = sigtraps, i = NSIG+1; --i >= 0; p++) if (p->trap != NULL) { shf_puts("trap -- ", shl_stdout); print_value_quoted(shl_stdout, p->trap); shprintf(" %s\n", p->name); } return (0); } /* * Use case sensitive lookup for first arg so the * command 'exit' isn't confused with the pseudo-signal * 'EXIT'. */ /* get command */ s = (gettrap(*wp, false) == NULL) ? *wp++ : NULL; if (s != NULL && s[0] == '-' && s[1] == '\0') s = NULL; /* set/clear traps */ i = 0; while (*wp != NULL) if ((p = gettrap(*wp++, true)) == NULL) { warningf(true, "%s: %s '%s'", builtin_argv0, "bad signal", wp[-1]); ++i; } else settrap(p, s); return (i); } int c_exitreturn(const char **wp) { int n, how = LEXIT; const char *arg; if (ksh_getopt(wp, &builtin_opt, null) == '?') goto c_exitreturn_err; arg = wp[builtin_opt.optind]; if (arg) { if (!getn(arg, &n)) { exstat = 1; warningf(true, "%s: %s", arg, "bad number"); } else exstat = n; } else if (trap_exstat != -1) exstat = trap_exstat; if (wp[0][0] == 'r') { /* return */ struct env *ep; /* * need to tell if this is exit or return so trap exit will * work right (POSIX) */ for (ep = e; ep; ep = ep->oenv) if (STOP_RETURN(ep->type)) { how = LRETURN; break; } } if (how == LEXIT && !really_exit && j_stopped_running()) { really_exit = 1; how = LSHELL; } /* get rid of any i/o redirections */ quitenv(NULL); unwind(how); /* NOTREACHED */ c_exitreturn_err: return (1); } int c_brkcont(const char **wp) { int n, quit; struct env *ep, *last_ep = NULL; const char *arg; if (ksh_getopt(wp, &builtin_opt, null) == '?') goto c_brkcont_err; arg = wp[builtin_opt.optind]; if (!arg) n = 1; else if (!bi_getn(arg, &n)) goto c_brkcont_err; if (n <= 0) { /* AT&T ksh does this for non-interactive shells only - weird */ bi_errorf("%s: %s", arg, "bad value"); goto c_brkcont_err; } quit = n; /* Stop at E_NONE, E_PARSE, E_FUNC, or E_INCL */ for (ep = e; ep && !STOP_BRKCONT(ep->type); ep = ep->oenv) if (ep->type == E_LOOP) { if (--quit == 0) break; ep->flags |= EF_BRKCONT_PASS; last_ep = ep; } if (quit) { /* * AT&T ksh doesn't print a message - just does what it * can. We print a message 'cause it helps in debugging * scripts, but don't generate an error (ie, keep going). */ if (n == quit) { warningf(true, "%s: %s %s", wp[0], "can't", wp[0]); return (0); } /* * POSIX says if n is too big, the last enclosing loop * shall be used. Doesn't say to print an error but we * do anyway 'cause the user messed up. */ if (last_ep) last_ep->flags &= ~EF_BRKCONT_PASS; warningf(true, "%s: can only %s %d level(s)", wp[0], wp[0], n - quit); } unwind(*wp[0] == 'b' ? LBREAK : LCONTIN); /* NOTREACHED */ c_brkcont_err: return (1); } int c_set(const char **wp) { int argi; bool setargs; struct block *l = e->loc; const char **owp; if (wp[1] == NULL) { static const char *args[] = { Tset, "-", NULL }; return (c_typeset(args)); } argi = parse_args(wp, OF_SET, &setargs); if (argi < 0) return (1); /* set $# and $* */ if (setargs) { wp += argi - 1; owp = wp; /* save $0 */ wp[0] = l->argv[0]; while (*++wp != NULL) strdupx(*wp, *wp, &l->area); l->argc = wp - owp - 1; l->argv = alloc2(l->argc + 2, sizeof(char *), &l->area); for (wp = l->argv; (*wp++ = *owp++) != NULL; ) ; } /*- * POSIX says set exit status is 0, but old scripts that use * getopt(1) use the construct * set -- $(getopt ab:c "$@") * which assumes the exit value set will be that of the $() * (subst_exstat is cleared in execute() so that it will be 0 * if there are no command substitutions). * Switched ksh (!posix !sh) to POSIX in mksh R39b. */ return (Flag(FSH) ? subst_exstat : 0); } int c_unset(const char **wp) { const char *id; int optc, rv = 0; bool unset_var = true; while ((optc = ksh_getopt(wp, &builtin_opt, "fv")) != -1) switch (optc) { case 'f': unset_var = false; break; case 'v': unset_var = true; break; case '?': /*XXX not reached due to GF_ERROR */ return (2); } wp += builtin_opt.optind; for (; (id = *wp) != NULL; wp++) if (unset_var) { /* unset variable */ struct tbl *vp; char *cp = NULL; size_t n; n = strlen(id); if (n > 3 && id[n-3] == '[' && id[n-2] == '*' && id[n-1] == ']') { strndupx(cp, id, n - 3, ATEMP); id = cp; optc = 3; } else optc = vstrchr(id, '[') ? 0 : 1; vp = global(id); afree(cp, ATEMP); if ((vp->flag&RDONLY)) { warningf(true, "read-only: %s", vp->name); rv = 1; } else unset(vp, optc); } else /* unset function */ define(id, NULL); return (rv); } static void p_time(struct shf *shf, bool posix, long tv_sec, int tv_usec, int width, const char *prefix, const char *suffix) { tv_usec /= 10000; if (posix) shf_fprintf(shf, "%s%*ld.%02d%s", prefix, width, tv_sec, tv_usec, suffix); else shf_fprintf(shf, "%s%*ldm%d.%02ds%s", prefix, width, tv_sec / 60, (int)(tv_sec % 60), tv_usec, suffix); } int c_times(const char **wp MKSH_A_UNUSED) { struct rusage usage; getrusage(RUSAGE_SELF, &usage); p_time(shl_stdout, false, usage.ru_utime.tv_sec, usage.ru_utime.tv_usec, 0, null, " "); p_time(shl_stdout, false, usage.ru_stime.tv_sec, usage.ru_stime.tv_usec, 0, null, "\n"); getrusage(RUSAGE_CHILDREN, &usage); p_time(shl_stdout, false, usage.ru_utime.tv_sec, usage.ru_utime.tv_usec, 0, null, " "); p_time(shl_stdout, false, usage.ru_stime.tv_sec, usage.ru_stime.tv_usec, 0, null, "\n"); return (0); } /* * time pipeline (really a statement, not a built-in command) */ int timex(struct op *t, int f, volatile int *xerrok) { #define TF_NOARGS BIT(0) #define TF_NOREAL BIT(1) /* don't report real time */ #define TF_POSIX BIT(2) /* report in POSIX format */ int rv = 0, tf = 0; struct rusage ru0, ru1, cru0, cru1; struct timeval usrtime, systime, tv0, tv1; gettimeofday(&tv0, NULL); getrusage(RUSAGE_SELF, &ru0); getrusage(RUSAGE_CHILDREN, &cru0); if (t->left) { /* * Two ways of getting cpu usage of a command: just use t0 * and t1 (which will get cpu usage from other jobs that * finish while we are executing t->left), or get the * cpu usage of t->left. AT&T ksh does the former, while * pdksh tries to do the later (the j_usrtime hack doesn't * really work as it only counts the last job). */ timerclear(&j_usrtime); timerclear(&j_systime); rv = execute(t->left, f | XTIME, xerrok); if (t->left->type == TCOM) tf |= t->left->str[0]; gettimeofday(&tv1, NULL); getrusage(RUSAGE_SELF, &ru1); getrusage(RUSAGE_CHILDREN, &cru1); } else tf = TF_NOARGS; if (tf & TF_NOARGS) { /* ksh93 - report shell times (shell+kids) */ tf |= TF_NOREAL; timeradd(&ru0.ru_utime, &cru0.ru_utime, &usrtime); timeradd(&ru0.ru_stime, &cru0.ru_stime, &systime); } else { timersub(&ru1.ru_utime, &ru0.ru_utime, &usrtime); timeradd(&usrtime, &j_usrtime, &usrtime); timersub(&ru1.ru_stime, &ru0.ru_stime, &systime); timeradd(&systime, &j_systime, &systime); } if (!(tf & TF_NOREAL)) { timersub(&tv1, &tv0, &tv1); if (tf & TF_POSIX) p_time(shl_out, true, tv1.tv_sec, tv1.tv_usec, 5, "real ", "\n"); else p_time(shl_out, false, tv1.tv_sec, tv1.tv_usec, 5, null, " real "); } if (tf & TF_POSIX) p_time(shl_out, true, usrtime.tv_sec, usrtime.tv_usec, 5, "user ", "\n"); else p_time(shl_out, false, usrtime.tv_sec, usrtime.tv_usec, 5, null, " user "); if (tf & TF_POSIX) p_time(shl_out, true, systime.tv_sec, systime.tv_usec, 5, "sys ", "\n"); else p_time(shl_out, false, systime.tv_sec, systime.tv_usec, 5, null, " system\n"); shf_flush(shl_out); return (rv); } void timex_hook(struct op *t, char **volatile *app) { char **wp = *app; int optc, i, j; Getopt opt; ksh_getopt_reset(&opt, 0); /* start at the start */ opt.optind = 0; while ((optc = ksh_getopt((const char **)wp, &opt, ":p")) != -1) switch (optc) { case 'p': t->str[0] |= TF_POSIX; break; case '?': errorf("time: -%s %s", opt.optarg, "unknown option"); case ':': errorf("time: -%s %s", opt.optarg, "requires an argument"); } /* Copy command words down over options. */ if (opt.optind != 0) { for (i = 0; i < opt.optind; i++) afree(wp[i], ATEMP); for (i = 0, j = opt.optind; (wp[i] = wp[j]); i++, j++) ; } if (!wp[0]) t->str[0] |= TF_NOARGS; *app = wp; } /* exec with no args - args case is taken care of in comexec() */ int c_exec(const char **wp MKSH_A_UNUSED) { int i; /* make sure redirects stay in place */ if (e->savefd != NULL) { for (i = 0; i < NUFILE; i++) { if (e->savefd[i] > 0) close(e->savefd[i]); /* * keep all file descriptors > 2 private for ksh, * but not for POSIX or legacy/kludge sh */ if (!Flag(FPOSIX) && !Flag(FSH) && i > 2 && e->savefd[i]) fcntl(i, F_SETFD, FD_CLOEXEC); } e->savefd = NULL; } return (0); } #if HAVE_MKNOD int c_mknod(const char **wp) { int argc, optc, rv = 0; bool ismkfifo = false; const char **argv; void *set = NULL; mode_t mode = 0, oldmode = 0; while ((optc = ksh_getopt(wp, &builtin_opt, "m:")) != -1) { switch (optc) { case 'm': set = setmode(builtin_opt.optarg); if (set == NULL) { bi_errorf("invalid file mode"); return (1); } mode = getmode(set, (mode_t)(DEFFILEMODE)); free_ossetmode(set); break; default: goto c_mknod_usage; } } argv = &wp[builtin_opt.optind]; if (argv[0] == NULL) goto c_mknod_usage; for (argc = 0; argv[argc]; argc++) ; if (argc == 2 && argv[1][0] == 'p') ismkfifo = true; else if (argc != 4 || (argv[1][0] != 'b' && argv[1][0] != 'c')) goto c_mknod_usage; if (set != NULL) oldmode = umask((mode_t)0); else mode = DEFFILEMODE; mode |= (argv[1][0] == 'b') ? S_IFBLK : (argv[1][0] == 'c') ? S_IFCHR : 0; if (!ismkfifo) { unsigned long majnum, minnum; dev_t dv; char *c; majnum = strtoul(argv[2], &c, 0); if ((c == argv[2]) || (*c != '\0')) { bi_errorf("non-numeric %s %s '%s'", "device", "major", argv[2]); goto c_mknod_err; } minnum = strtoul(argv[3], &c, 0); if ((c == argv[3]) || (*c != '\0')) { bi_errorf("non-numeric %s %s '%s'", "device", "minor", argv[3]); goto c_mknod_err; } dv = makedev(majnum, minnum); if ((unsigned long)(major(dv)) != majnum) { bi_errorf("%s %s too large: %lu", "device", "major", majnum); goto c_mknod_err; } if ((unsigned long)(minor(dv)) != minnum) { bi_errorf("%s %s too large: %lu", "device", "minor", minnum); goto c_mknod_err; } if (mknod(argv[0], mode, dv)) goto c_mknod_failed; } else if (mkfifo(argv[0], mode)) { c_mknod_failed: bi_errorf("%s: %s", argv[0], strerror(errno)); c_mknod_err: rv = 1; } if (set) umask(oldmode); return (rv); c_mknod_usage: bi_errorf("%s: %s", "usage", "mknod [-m mode] name b|c major minor"); bi_errorf("%s: %s", "usage", "mknod [-m mode] name p"); return (1); } #endif /*- test(1) roughly accepts the following grammar: oexpr ::= aexpr | aexpr "-o" oexpr ; aexpr ::= nexpr | nexpr "-a" aexpr ; nexpr ::= primary | "!" nexpr ; primary ::= unary-operator operand | operand binary-operator operand | operand | "(" oexpr ")" ; unary-operator ::= "-a"|"-r"|"-w"|"-x"|"-e"|"-f"|"-d"|"-c"|"-b"|"-p"| "-u"|"-g"|"-k"|"-s"|"-t"|"-z"|"-n"|"-o"|"-O"|"-G"| "-L"|"-h"|"-S"|"-H"; binary-operator ::= "="|"=="|"!="|"-eq"|"-ne"|"-ge"|"-gt"|"-le"|"-lt"| "-nt"|"-ot"|"-ef"| "<"|">" # rules used for [[ ... ]] expressions ; operand ::= */ /* POSIX says > 1 for errors */ #define T_ERR_EXIT 2 int c_test(const char **wp) { int argc, rv, invert = 0; Test_env te; Test_op op; const char *lhs, **swp; te.flags = 0; te.isa = ptest_isa; te.getopnd = ptest_getopnd; te.eval = test_eval; te.error = ptest_error; for (argc = 0; wp[argc]; argc++) ; if (strcmp(wp[0], "[") == 0) { if (strcmp(wp[--argc], "]") != 0) { bi_errorf("missing ]"); return (T_ERR_EXIT); } } te.pos.wp = wp + 1; te.wp_end = wp + argc; /* * Attempt to conform to POSIX special cases. This is pretty * dumb code straight-forward from the 2008 spec, but unless * the old pdksh code doesn't live from so many assumptions. * It does, though, inline some calls to '(*te.funcname)()'. */ switch (argc - 1) { case 0: return (1); case 1: ptest_one: op = TO_STNZE; goto ptest_unary; case 2: ptest_two: if (ptest_isa(&te, TM_NOT)) { ++invert; goto ptest_one; } if ((op = ptest_isa(&te, TM_UNOP))) { ptest_unary: rv = test_eval(&te, op, *te.pos.wp++, NULL, true); ptest_out: return ((invert & 1) ? rv : !rv); } /* let the parser deal with anything else */ break; case 3: ptest_three: swp = te.pos.wp; /* use inside knowledge of ptest_getopnd inlined below */ lhs = *te.pos.wp++; if ((op = ptest_isa(&te, TM_BINOP))) { /* test lhs op rhs */ rv = test_eval(&te, op, lhs, *te.pos.wp++, true); goto ptest_out; } /* back up to lhs */ te.pos.wp = swp; if (ptest_isa(&te, TM_NOT)) { ++invert; goto ptest_two; } if (ptest_isa(&te, TM_OPAREN)) { swp = te.pos.wp; /* skip operand, without evaluation */ te.pos.wp++; /* check for closing parenthesis */ op = ptest_isa(&te, TM_CPAREN); /* back up to operand */ te.pos.wp = swp; /* if there was a closing paren, handle it */ if (op) goto ptest_one; /* backing up is done before calling the parser */ } /* let the parser deal with it */ break; case 4: if (ptest_isa(&te, TM_NOT)) { ++invert; goto ptest_three; } if (ptest_isa(&te, TM_OPAREN)) { swp = te.pos.wp; /* skip two operands, without evaluation */ te.pos.wp++; te.pos.wp++; /* check for closing parenthesis */ op = ptest_isa(&te, TM_CPAREN); /* back up to first operand */ te.pos.wp = swp; /* if there was a closing paren, handle it */ if (op) goto ptest_two; /* backing up is done before calling the parser */ } /* defer this to the parser */ break; } /* "The results are unspecified." */ te.pos.wp = wp + 1; return (test_parse(&te)); } /* * Generic test routines. */ Test_op test_isop(Test_meta meta, const char *s) { char sc1; const struct t_op *tbl; tbl = meta == TM_UNOP ? u_ops : b_ops; if (*s) { sc1 = s[1]; for (; tbl->op_text[0]; tbl++) if (sc1 == tbl->op_text[1] && !strcmp(s, tbl->op_text)) return (tbl->op_num); } return (TO_NONOP); } int test_eval(Test_env *te, Test_op op, const char *opnd1, const char *opnd2, bool do_eval) { int i, s; size_t k; struct stat b1, b2; mksh_ari_t v1, v2; if (!do_eval) return (0); switch (op) { /* * Unary Operators */ /* -n */ case TO_STNZE: return (*opnd1 != '\0'); /* -z */ case TO_STZER: return (*opnd1 == '\0'); /* -o */ case TO_OPTION: if ((i = *opnd1) == '!' || i == '?') opnd1++; if ((k = option(opnd1)) == (size_t)-1) return (0); return (i == '?' ? 1 : i == '!' ? !Flag(k) : Flag(k)); /* -r */ case TO_FILRD: /* LINTED use of access */ return (access(opnd1, R_OK) == 0); /* -w */ case TO_FILWR: /* LINTED use of access */ return (access(opnd1, W_OK) == 0); /* -x */ case TO_FILEX: return (ksh_access(opnd1, X_OK) == 0); /* -a */ case TO_FILAXST: /* -e */ case TO_FILEXST: return (stat(opnd1, &b1) == 0); /* -r */ case TO_FILREG: return (stat(opnd1, &b1) == 0 && S_ISREG(b1.st_mode)); /* -d */ case TO_FILID: return (stat(opnd1, &b1) == 0 && S_ISDIR(b1.st_mode)); /* -c */ case TO_FILCDEV: return (stat(opnd1, &b1) == 0 && S_ISCHR(b1.st_mode)); /* -b */ case TO_FILBDEV: return (stat(opnd1, &b1) == 0 && S_ISBLK(b1.st_mode)); /* -p */ case TO_FILFIFO: return (stat(opnd1, &b1) == 0 && S_ISFIFO(b1.st_mode)); /* -h or -L */ case TO_FILSYM: return (lstat(opnd1, &b1) == 0 && S_ISLNK(b1.st_mode)); /* -S */ case TO_FILSOCK: return (stat(opnd1, &b1) == 0 && S_ISSOCK(b1.st_mode)); /* -H => HP context dependent files (directories) */ case TO_FILCDF: #ifdef S_ISCDF { char *nv; /* * Append a + to filename and check to see if result is * a setuid directory. CDF stuff in general is hookey, * since it breaks for, e.g., the following sequence: * echo hi >foo+; mkdir foo; echo bye >foo/default; * chmod u+s foo (foo+ refers to the file with hi in it, * there is no way to get at the file with bye in it; * please correct me if I'm wrong about this). */ nv = shf_smprintf("%s+", opnd1); i = (stat(nv, &b1) == 0 && S_ISCDF(b1.st_mode)); afree(nv, ATEMP); return (i); } #else return (0); #endif /* -u */ case TO_FILSETU: return (stat(opnd1, &b1) == 0 && (b1.st_mode & S_ISUID) == S_ISUID); /* -g */ case TO_FILSETG: return (stat(opnd1, &b1) == 0 && (b1.st_mode & S_ISGID) == S_ISGID); /* -k */ case TO_FILSTCK: #ifdef S_ISVTX return (stat(opnd1, &b1) == 0 && (b1.st_mode & S_ISVTX) == S_ISVTX); #else return (0); #endif /* -s */ case TO_FILGZ: return (stat(opnd1, &b1) == 0 && (off_t)b1.st_size > (off_t)0); /* -t */ case TO_FILTT: if (opnd1 && !bi_getn(opnd1, &i)) { te->flags |= TEF_ERROR; i = 0; } else i = isatty(opnd1 ? i : 0); return (i); /* -O */ case TO_FILUID: return (stat(opnd1, &b1) == 0 && (uid_t)b1.st_uid == ksheuid); /* -G */ case TO_FILGID: return (stat(opnd1, &b1) == 0 && (gid_t)b1.st_gid == getegid()); /* * Binary Operators */ /* = */ case TO_STEQL: if (te->flags & TEF_DBRACKET) return (gmatchx(opnd1, opnd2, false)); return (strcmp(opnd1, opnd2) == 0); /* != */ case TO_STNEQ: if (te->flags & TEF_DBRACKET) return (!gmatchx(opnd1, opnd2, false)); return (strcmp(opnd1, opnd2) != 0); /* < */ case TO_STLT: return (strcmp(opnd1, opnd2) < 0); /* > */ case TO_STGT: return (strcmp(opnd1, opnd2) > 0); /* -eq */ case TO_INTEQ: /* -ne */ case TO_INTNE: /* -ge */ case TO_INTGE: /* -gt */ case TO_INTGT: /* -le */ case TO_INTLE: /* -lt */ case TO_INTLT: if (!evaluate(opnd1, &v1, KSH_RETURN_ERROR, false) || !evaluate(opnd2, &v2, KSH_RETURN_ERROR, false)) { /* error already printed.. */ te->flags |= TEF_ERROR; return (1); } switch (op) { case TO_INTEQ: return (v1 == v2); case TO_INTNE: return (v1 != v2); case TO_INTGE: return (v1 >= v2); case TO_INTGT: return (v1 > v2); case TO_INTLE: return (v1 <= v2); case TO_INTLT: return (v1 < v2); default: /* NOTREACHED */ break; } /* NOTREACHED */ /* -nt */ case TO_FILNT: /* * ksh88/ksh93 succeed if file2 can't be stated * (subtly different from 'does not exist'). */ return (stat(opnd1, &b1) == 0 && (((s = stat(opnd2, &b2)) == 0 && b1.st_mtime > b2.st_mtime) || s < 0)); /* -ot */ case TO_FILOT: /* * ksh88/ksh93 succeed if file1 can't be stated * (subtly different from 'does not exist'). */ return (stat(opnd2, &b2) == 0 && (((s = stat(opnd1, &b1)) == 0 && b1.st_mtime < b2.st_mtime) || s < 0)); /* -ef */ case TO_FILEQ: return (stat (opnd1, &b1) == 0 && stat (opnd2, &b2) == 0 && b1.st_dev == b2.st_dev && b1.st_ino == b2.st_ino); /* all other cases */ case TO_NONOP: case TO_NONNULL: /* throw the error */ break; } (*te->error)(te, 0, "internal error: unknown op"); return (1); } int test_parse(Test_env *te) { int rv; rv = test_oexpr(te, 1); if (!(te->flags & TEF_ERROR) && !(*te->isa)(te, TM_END)) (*te->error)(te, 0, "unexpected operator/operand"); return ((te->flags & TEF_ERROR) ? T_ERR_EXIT : !rv); } static int test_oexpr(Test_env *te, bool do_eval) { int rv; if ((rv = test_aexpr(te, do_eval))) do_eval = false; if (!(te->flags & TEF_ERROR) && (*te->isa)(te, TM_OR)) return (test_oexpr(te, do_eval) || rv); return (rv); } static int test_aexpr(Test_env *te, bool do_eval) { int rv; if (!(rv = test_nexpr(te, do_eval))) do_eval = false; if (!(te->flags & TEF_ERROR) && (*te->isa)(te, TM_AND)) return (test_aexpr(te, do_eval) && rv); return (rv); } static int test_nexpr(Test_env *te, bool do_eval) { if (!(te->flags & TEF_ERROR) && (*te->isa)(te, TM_NOT)) return (!test_nexpr(te, do_eval)); return (test_primary(te, do_eval)); } static int test_primary(Test_env *te, bool do_eval) { const char *opnd1, *opnd2; int rv; Test_op op; if (te->flags & TEF_ERROR) return (0); if ((*te->isa)(te, TM_OPAREN)) { rv = test_oexpr(te, do_eval); if (te->flags & TEF_ERROR) return (0); if (!(*te->isa)(te, TM_CPAREN)) { (*te->error)(te, 0, "missing )"); return (0); } return (rv); } /* * Binary should have precedence over unary in this case * so that something like test \( -f = -f \) is accepted */ if ((te->flags & TEF_DBRACKET) || (&te->pos.wp[1] < te->wp_end && !test_isop(TM_BINOP, te->pos.wp[1]))) { if ((op = (*te->isa)(te, TM_UNOP))) { /* unary expression */ opnd1 = (*te->getopnd)(te, op, do_eval); if (!opnd1) { (*te->error)(te, -1, "missing argument"); return (0); } return ((*te->eval)(te, op, opnd1, NULL, do_eval)); } } opnd1 = (*te->getopnd)(te, TO_NONOP, do_eval); if (!opnd1) { (*te->error)(te, 0, "expression expected"); return (0); } if ((op = (*te->isa)(te, TM_BINOP))) { /* binary expression */ opnd2 = (*te->getopnd)(te, op, do_eval); if (!opnd2) { (*te->error)(te, -1, "missing second argument"); return (0); } return ((*te->eval)(te, op, opnd1, opnd2, do_eval)); } return ((*te->eval)(te, TO_STNZE, opnd1, NULL, do_eval)); } /* * Plain test (test and [ .. ]) specific routines. */ /* * Test if the current token is a whatever. Accepts the current token if * it is. Returns 0 if it is not, non-zero if it is (in the case of * TM_UNOP and TM_BINOP, the returned value is a Test_op). */ static Test_op ptest_isa(Test_env *te, Test_meta meta) { /* Order important - indexed by Test_meta values */ static const char *const tokens[] = { "-o", "-a", "!", "(", ")" }; Test_op rv; if (te->pos.wp >= te->wp_end) return (meta == TM_END ? TO_NONNULL : TO_NONOP); if (meta == TM_UNOP || meta == TM_BINOP) rv = test_isop(meta, *te->pos.wp); else if (meta == TM_END) rv = TO_NONOP; else rv = !strcmp(*te->pos.wp, tokens[(int)meta]) ? TO_NONNULL : TO_NONOP; /* Accept the token? */ if (rv != TO_NONOP) te->pos.wp++; return (rv); } static const char * ptest_getopnd(Test_env *te, Test_op op, bool do_eval MKSH_A_UNUSED) { if (te->pos.wp >= te->wp_end) return (op == TO_FILTT ? "1" : NULL); return (*te->pos.wp++); } static void ptest_error(Test_env *te, int ofs, const char *msg) { const char *op; te->flags |= TEF_ERROR; if ((op = te->pos.wp + ofs >= te->wp_end ? NULL : te->pos.wp[ofs])) bi_errorf("%s: %s", op, msg); else bi_errorf("%s", msg); } #ifndef MKSH_NO_LIMITS #define SOFT 0x1 #define HARD 0x2 struct limits { const char *name; int resource; /* resource to get/set */ unsigned int factor; /* multiply by to get rlim_{cur,max} values */ char option; }; static void print_ulimit(const struct limits *, int); static int set_ulimit(const struct limits *, const char *, int); /* Magic to divine the 'm' and 'v' limits */ #ifdef RLIMIT_AS #if !defined(RLIMIT_VMEM) || (RLIMIT_VMEM == RLIMIT_AS) || \ !defined(RLIMIT_RSS) || (RLIMIT_VMEM == RLIMIT_RSS) #define ULIMIT_V_IS_AS #elif defined(RLIMIT_VMEM) #if !defined(RLIMIT_RSS) || (RLIMIT_RSS == RLIMIT_AS) #define ULIMIT_V_IS_AS #else #define ULIMIT_V_IS_VMEM #endif #endif #endif #ifdef RLIMIT_RSS #ifdef ULIMIT_V_IS_VMEM #define ULIMIT_M_IS_RSS #elif defined(RLIMIT_VMEM) && (RLIMIT_VMEM == RLIMIT_RSS) #define ULIMIT_M_IS_VMEM #else #define ULIMIT_M_IS_RSS #endif #if defined(ULIMIT_M_IS_RSS) && defined(RLIMIT_AS) && (RLIMIT_RSS == RLIMIT_AS) #undef ULIMIT_M_IS_RSS #endif #endif #if !defined(RLIMIT_AS) && !defined(ULIMIT_M_IS_VMEM) && defined(RLIMIT_VMEM) #define ULIMIT_V_IS_VMEM #endif #if !defined(ULIMIT_V_IS_VMEM) && defined(RLIMIT_VMEM) && \ (!defined(RLIMIT_RSS) || (defined(RLIMIT_AS) && (RLIMIT_RSS == RLIMIT_AS))) #define ULIMIT_M_IS_VMEM #endif #if defined(ULIMIT_M_IS_VMEM) && defined(RLIMIT_AS) && \ (RLIMIT_VMEM == RLIMIT_AS) #undef ULIMIT_M_IS_VMEM #endif int c_ulimit(const char **wp) { static const struct limits limits[] = { /* do not use options -H, -S or -a or change the order */ #ifdef RLIMIT_CPU { "time(cpu-seconds)", RLIMIT_CPU, 1, 't' }, #endif #ifdef RLIMIT_FSIZE { "file(blocks)", RLIMIT_FSIZE, 512, 'f' }, #endif #ifdef RLIMIT_CORE { "coredump(blocks)", RLIMIT_CORE, 512, 'c' }, #endif #ifdef RLIMIT_DATA { "data(KiB)", RLIMIT_DATA, 1024, 'd' }, #endif #ifdef RLIMIT_STACK { "stack(KiB)", RLIMIT_STACK, 1024, 's' }, #endif #ifdef RLIMIT_MEMLOCK { "lockedmem(KiB)", RLIMIT_MEMLOCK, 1024, 'l' }, #endif #ifdef RLIMIT_NOFILE { "nofiles(descriptors)", RLIMIT_NOFILE, 1, 'n' }, #endif #ifdef RLIMIT_NPROC { "processes", RLIMIT_NPROC, 1, 'p' }, #endif #ifdef RLIMIT_SWAP { "swap(KiB)", RLIMIT_SWAP, 1024, 'w' }, #endif #ifdef RLIMIT_LOCKS { "flocks", RLIMIT_LOCKS, -1, 'L' }, #endif #ifdef RLIMIT_TIME { "humantime(seconds)", RLIMIT_TIME, 1, 'T' }, #endif #ifdef RLIMIT_NOVMON { "vnodemonitors", RLIMIT_NOVMON, 1, 'V' }, #endif #ifdef RLIMIT_SIGPENDING { "sigpending", RLIMIT_SIGPENDING, 1, 'i' }, #endif #ifdef RLIMIT_MSGQUEUE { "msgqueue(bytes)", RLIMIT_MSGQUEUE, 1, 'q' }, #endif #ifdef RLIMIT_AIO_MEM { "AIOlockedmem(KiB)", RLIMIT_AIO_MEM, 1024, 'M' }, #endif #ifdef RLIMIT_AIO_OPS { "AIOoperations", RLIMIT_AIO_OPS, 1, 'O' }, #endif #ifdef RLIMIT_TCACHE { "cachedthreads", RLIMIT_TCACHE, 1, 'C' }, #endif #ifdef RLIMIT_SBSIZE { "sockbufsiz(KiB)", RLIMIT_SBSIZE, 1024, 'B' }, #endif #ifdef RLIMIT_PTHREAD { "threadsperprocess", RLIMIT_PTHREAD, 1, 'P' }, #endif #ifdef RLIMIT_NICE { "maxnice", RLIMIT_NICE, 1, 'e' }, #endif #ifdef RLIMIT_RTPRIO { "maxrtprio", RLIMIT_RTPRIO, 1, 'r' }, #endif #if defined(ULIMIT_M_IS_RSS) { "resident-set(KiB)", RLIMIT_RSS, 1024, 'm' }, #elif defined(ULIMIT_M_IS_VMEM) { "memory(KiB)", RLIMIT_VMEM, 1024, 'm' }, #endif #if defined(ULIMIT_V_IS_VMEM) { "virtual-memory(KiB)", RLIMIT_VMEM, 1024, 'v' }, #elif defined(ULIMIT_V_IS_AS) { "address-space(KiB)", RLIMIT_AS, 1024, 'v' }, #endif { NULL, 0, 0, 0 } }; static char opts[3 + NELEM(limits)]; int how = SOFT | HARD, optc, what = 'f'; bool all = false; const struct limits *l; if (!opts[0]) { /* build options string on first call - yuck */ char *p = opts; *p++ = 'H'; *p++ = 'S'; *p++ = 'a'; for (l = limits; l->name; l++) *p++ = l->option; *p = '\0'; } while ((optc = ksh_getopt(wp, &builtin_opt, opts)) != -1) switch (optc) { case 'H': how = HARD; break; case 'S': how = SOFT; break; case 'a': all = true; break; case '?': bi_errorf("%s: %s", "usage", "ulimit [-acdfHLlmnpSsTtvw] [value]"); return (1); default: what = optc; } for (l = limits; l->name && l->option != what; l++) ; if (!l->name) { internal_warningf("ulimit: %c", what); return (1); } if (wp[builtin_opt.optind]) { if (all || wp[builtin_opt.optind + 1]) { bi_errorf("too many arguments"); return (1); } return (set_ulimit(l, wp[builtin_opt.optind], how)); } if (!all) print_ulimit(l, how); else for (l = limits; l->name; l++) { shprintf("%-20s ", l->name); print_ulimit(l, how); } return (0); } static int set_ulimit(const struct limits *l, const char *v, int how) { rlim_t val = (rlim_t)0; struct rlimit limit; if (strcmp(v, "unlimited") == 0) val = (rlim_t)RLIM_INFINITY; else { mksh_uari_t rval; if (!evaluate(v, (mksh_ari_t *)&rval, KSH_RETURN_ERROR, false)) return (1); /* * Avoid problems caused by typos that evaluate misses due * to evaluating unset parameters to 0... * If this causes problems, will have to add parameter to * evaluate() to control if unset params are 0 or an error. */ if (!rval && !ksh_isdigit(v[0])) { bi_errorf("invalid %s limit: %s", l->name, v); return (1); } val = (rlim_t)((rlim_t)rval * l->factor); } if (getrlimit(l->resource, &limit) < 0) { /* some can't be read, e.g. Linux RLIMIT_LOCKS */ limit.rlim_cur = RLIM_INFINITY; limit.rlim_max = RLIM_INFINITY; } if (how & SOFT) limit.rlim_cur = val; if (how & HARD) limit.rlim_max = val; if (!setrlimit(l->resource, &limit)) return (0); if (errno == EPERM) bi_errorf("%s exceeds allowable %s limit", v, l->name); else bi_errorf("bad %s limit: %s", l->name, strerror(errno)); return (1); } static void print_ulimit(const struct limits *l, int how) { rlim_t val = (rlim_t)0; struct rlimit limit; if (getrlimit(l->resource, &limit)) { shf_puts("unknown\n", shl_stdout); return; } if (how & SOFT) val = limit.rlim_cur; else if (how & HARD) val = limit.rlim_max; if (val == (rlim_t)RLIM_INFINITY) shf_puts("unlimited\n", shl_stdout); else shprintf("%lu\n", (unsigned long)(val / l->factor)); } #endif int c_rename(const char **wp) { int rv = 1; /* skip argv[0] */ ++wp; if (wp[0] && !strcmp(wp[0], "--")) /* skip "--" (options separator) */ ++wp; /* check for exactly two arguments */ if (wp[0] == NULL /* first argument */ || wp[1] == NULL /* second argument */ || wp[2] != NULL /* no further args please */) bi_errorf(Tsynerr); else if ((rv = rename(wp[0], wp[1])) != 0) { rv = errno; bi_errorf("%s: %s", "failed", strerror(rv)); } return (rv); } int c_realpath(const char **wp) { int rv = 1; char *buf; /* skip argv[0] */ ++wp; if (wp[0] && !strcmp(wp[0], "--")) /* skip "--" (options separator) */ ++wp; /* check for exactly one argument */ if (wp[0] == NULL || wp[1] != NULL) bi_errorf(Tsynerr); else if ((buf = do_realpath(wp[0])) == NULL) { rv = errno; bi_errorf("%s: %s", wp[0], strerror(rv)); if ((unsigned int)rv > 255) rv = 255; } else { shprintf("%s\n", buf); afree(buf, ATEMP); rv = 0; } return (rv); } int c_cat(const char **wp) { int fd = STDIN_FILENO, rv; ssize_t n, w; const char *fn = ""; char *buf, *cp; #define MKSH_CAT_BUFSIZ 4096 if ((buf = malloc_osfunc(MKSH_CAT_BUFSIZ)) == NULL) { bi_errorf(Toomem, (unsigned long)MKSH_CAT_BUFSIZ); return (1); } /* parse options: POSIX demands we support "-u" as no-op */ while ((rv = ksh_getopt(wp, &builtin_opt, "u")) != -1) { switch (rv) { case 'u': /* we already operate unbuffered */ break; default: bi_errorf(Tsynerr); return (1); } } wp += builtin_opt.optind; rv = 0; do { if (*wp) { fn = *wp++; if (fn[0] == '-' && fn[1] == '\0') fd = STDIN_FILENO; else if ((fd = open(fn, O_RDONLY)) < 0) { rv = errno; bi_errorf("%s: %s", fn, strerror(rv)); rv = 1; continue; } } while (/* CONSTCOND */ 1) { n = blocking_read(fd, (cp = buf), MKSH_CAT_BUFSIZ); if (n == -1) { if (errno == EINTR) { /* give the user a chance to ^C out */ intrcheck(); /* interrupted, try again */ continue; } /* an error occured during reading */ rv = errno; bi_errorf("%s: %s", fn, strerror(rv)); rv = 1; break; } else if (n == 0) /* end of file reached */ break; while (n) { w = write(STDOUT_FILENO, cp, n); if (w == -1) { if (errno == EINTR) /* interrupted, try again */ continue; /* an error occured during writing */ rv = errno; bi_errorf("%s: %s", "", strerror(rv)); rv = 1; if (fd != STDIN_FILENO) close(fd); goto out; } n -= w; cp += w; } } if (fd != STDIN_FILENO) close(fd); } while (*wp); out: free_osfunc(buf); return (rv); } #if HAVE_SELECT int c_sleep(const char **wp) { struct timeval tv; int rv = 1; /* skip argv[0] */ ++wp; if (wp[0] && !strcmp(wp[0], "--")) /* skip "--" (options separator) */ ++wp; if (!wp[0] || wp[1]) bi_errorf(Tsynerr); else if (parse_usec(wp[0], &tv)) bi_errorf("%s: %s '%s'", Tsynerr, strerror(errno), wp[0]); else { #ifndef MKSH_NOPROSPECTOFWORK sigset_t omask, bmask; /* block a number of signals from interrupting us, though */ (void)sigemptyset(&bmask); (void)sigaddset(&bmask, SIGPIPE); (void)sigaddset(&bmask, SIGCHLD); #ifdef SIGWINCH (void)sigaddset(&bmask, SIGWINCH); #endif #ifdef SIGINFO (void)sigaddset(&bmask, SIGINFO); #endif #ifdef SIGUSR1 (void)sigaddset(&bmask, SIGUSR1); #endif #ifdef SIGUSR2 (void)sigaddset(&bmask, SIGUSR2); #endif sigprocmask(SIG_BLOCK, &bmask, &omask); #endif if (select(1, NULL, NULL, NULL, &tv) == 0 || errno == EINTR) /* * strictly speaking only for SIGALRM, but the * execution may be interrupted by other signals */ rv = 0; else bi_errorf("%s: %s", Tselect, strerror(errno)); #ifndef MKSH_NOPROSPECTOFWORK /* this will re-schedule signal delivery */ sigprocmask(SIG_SETMASK, &omask, NULL); #endif } return (rv); } #endif