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pack local bools into a struct, for tighter stack packing

This commit is contained in:
tg 2016-11-11 18:44:32 +00:00
parent 5ee8ba10b3
commit 4e855b1be2
2 changed files with 91 additions and 72 deletions
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142
funcs.c
View File

@ -38,7 +38,7 @@
#endif
#endif
__RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.306 2016/08/25 16:21:14 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.307 2016/11/11 18:44:31 tg Exp $");
#if HAVE_KILLPG
/*
@ -280,17 +280,37 @@ static void s_put(int);
int
c_print(const char **wp)
{
int fd = 1, c;
int c;
const char *s;
XString xs;
char *xp;
/* print newline; expand backslash sequences */
bool po_nl = true, po_exp = true;
/* print to history instead of file descriptor / stdout */
bool po_hist = false;
/* print characters */
bool po_char = false;
char ts[4];
XString xs;
struct {
/* temporary storage for a wide character */
mksh_ari_t wc;
/* output file descriptor (if any) */
int fd;
/* temporary storage for a multibyte character */
char ts[4];
/* print trailing newline? */
bool nl;
/* expand backslash sequences? */
bool exp;
/* print to history instead of file descriptor / stdout? */
bool hist;
/* print words as wide characters? */
bool chars;
/* print a "--" argument? */
bool pminusminus;
/* writing to a coprocess (SIGPIPE blocked)? */
bool coproc;
bool copipe;
} po;
po.fd = 1;
po.nl = true;
po.exp = true;
po.hist = false;
po.chars = false;
if (wp[0][0] == 'e') {
/* "echo" builtin */
@ -302,7 +322,7 @@ c_print(const char **wp)
* one that supports -e but does not enable it by
* default
*/
po_exp = false;
po.exp = false;
}
#endif
if (Flag(FPOSIX) ||
@ -313,13 +333,13 @@ c_print(const char **wp)
/* Debian Policy 10.4 compliant "echo" builtin */
if (*wp && !strcmp(*wp, "-n")) {
/* recognise "-n" only as the first arg */
po_nl = false;
po.nl = false;
++wp;
}
/* print everything as-is */
po_exp = false;
po.exp = false;
} else {
bool new_exp = po_exp, new_nl = po_nl;
bool new_exp = po.exp, new_nl = po.nl;
/**
* a compromise between sysV and BSD echo commands:
@ -346,8 +366,8 @@ c_print(const char **wp)
new_nl = false;
goto print_tradparse_ch;
case '\0':
po_exp = new_exp;
po_nl = new_nl;
po.exp = new_exp;
po.nl = new_nl;
++wp;
goto print_tradparse_arg;
}
@ -357,42 +377,42 @@ c_print(const char **wp)
/* "print" builtin */
const char *opts = "AnpRrsu,";
const char *emsg;
/* print a "--" argument */
bool po_pminusminus = false;
po.pminusminus = false;
while ((c = ksh_getopt(wp, &builtin_opt, opts)) != -1)
switch (c) {
case 'A':
po_char = true;
po.chars = true;
break;
case 'e':
po_exp = true;
po.exp = true;
break;
case 'n':
po_nl = false;
po.nl = false;
break;
case 'p':
if ((fd = coproc_getfd(W_OK, &emsg)) < 0) {
if ((po.fd = coproc_getfd(W_OK, &emsg)) < 0) {
bi_errorf(Tf_coproc, emsg);
return (1);
}
break;
case 'R':
/* fake BSD echo command */
po_pminusminus = true;
po_exp = false;
po.pminusminus = true;
po.exp = false;
opts = "en";
break;
case 'r':
po_exp = false;
po.exp = false;
break;
case 's':
po_hist = true;
po.hist = true;
break;
case 'u':
if (!*(s = builtin_opt.optarg))
fd = 0;
else if ((fd = check_fd(s, W_OK, &emsg)) < 0) {
po.fd = 0;
else if ((po.fd = check_fd(s, W_OK, &emsg)) < 0) {
bi_errorf("-u%s: %s", s, emsg);
return (1);
}
@ -406,35 +426,33 @@ c_print(const char **wp)
if (wp[builtin_opt.optind] &&
ksh_isdash(wp[builtin_opt.optind]))
builtin_opt.optind++;
} else if (po_pminusminus)
} else if (po.pminusminus)
builtin_opt.optind--;
wp += builtin_opt.optind;
}
Xinit(xs, xp, 128, ATEMP);
if (*wp != NULL && po_char) {
mksh_ari_t wc;
if (*wp != NULL && po.chars) {
do {
if (!evaluate(*wp, &wc, KSH_RETURN_ERROR, true))
if (!evaluate(*wp, &po.wc, KSH_RETURN_ERROR, true))
return (1);
Xcheck(xs, xp);
if (UTFMODE) {
ts[utf_wctomb(ts, wc)] = 0;
po.ts[utf_wctomb(po.ts, po.wc)] = 0;
c = 0;
do {
Xput(xs, xp, ts[c]);
} while (ts[++c]);
Xput(xs, xp, po.ts[c]);
} while (po.ts[++c]);
} else
Xput(xs, xp, wc & 0xFF);
Xput(xs, xp, po.wc & 0xFF);
} while (*++wp);
} else if (*wp != NULL) {
print_read_arg:
s = *wp;
while ((c = *s++) != '\0') {
Xcheck(xs, xp);
if (po_exp && c == '\\') {
if (po.exp && c == '\\') {
s_ptr = s;
c = unbksl(false, s_get, s_put);
s = s_ptr;
@ -442,7 +460,7 @@ c_print(const char **wp)
/* rejected by generic function */
switch ((c = *s++)) {
case 'c':
po_nl = false;
po.nl = false;
/* AT&T brain damage */
continue;
case '\0':
@ -454,11 +472,11 @@ c_print(const char **wp)
}
} else if ((unsigned int)c > 0xFF) {
/* generic function returned Unicode */
ts[utf_wctomb(ts, c - 0x100)] = 0;
po.ts[utf_wctomb(po.ts, c - 0x100)] = 0;
c = 0;
do {
Xput(xs, xp, ts[c]);
} while (ts[++c]);
Xput(xs, xp, po.ts[c]);
} while (po.ts[++c]);
continue;
}
}
@ -469,18 +487,16 @@ c_print(const char **wp)
goto print_read_arg;
}
}
if (po_nl)
if (po.nl)
Xput(xs, xp, '\n');
c = 0;
if (po_hist) {
if (po.hist) {
Xput(xs, xp, '\0');
histsave(&source->line, Xstring(xs, xp), HIST_STORE, false);
Xfree(xs, xp);
} else {
size_t len = Xlength(xs, xp);
bool po_coproc = false;
int opipe = 0;
/*
* Ensure we aren't killed by a SIGPIPE while writing to
@ -488,24 +504,25 @@ c_print(const char **wp)
* to just check that the co-process is alive which is
* not enough).
*/
if (coproc.write >= 0 && coproc.write == fd) {
po_coproc = true;
opipe = block_pipe();
}
if (coproc.write >= 0 && coproc.write == po.fd) {
po.coproc = true;
po.copipe = block_pipe();
} else
po.coproc = po.copipe = false;
s = Xstring(xs, xp);
while (len > 0) {
ssize_t nwritten;
if ((nwritten = write(fd, s, len)) < 0) {
if ((nwritten = write(po.fd, s, len)) < 0) {
if (errno == EINTR) {
if (po_coproc)
restore_pipe(opipe);
if (po.copipe)
restore_pipe();
/* give the user a chance to ^C out */
intrcheck();
/* interrupted, try again */
if (po_coproc)
opipe = block_pipe();
if (po.coproc)
po.copipe = block_pipe();
continue;
}
c = 1;
@ -514,8 +531,8 @@ c_print(const char **wp)
s += nwritten;
len -= nwritten;
}
if (po_coproc)
restore_pipe(opipe);
if (po.copipe)
restore_pipe();
}
return (c);
@ -3721,7 +3738,7 @@ c_cat(const char **wp)
ssize_t n, w;
const char *fn = "<stdin>";
char *buf, *cp;
int opipe = 0;
bool opipe;
#define MKSH_CAT_BUFSIZ 4096
/* parse options: POSIX demands we support "-u" as no-op */
@ -3761,7 +3778,8 @@ c_cat(const char **wp)
if ((n = blocking_read(fd, (cp = buf),
MKSH_CAT_BUFSIZ)) == -1) {
if (errno == EINTR) {
restore_pipe(opipe);
if (opipe)
restore_pipe();
/* give the user a chance to ^C out */
intrcheck();
/* interrupted, try again */
@ -3785,7 +3803,8 @@ c_cat(const char **wp)
}
if (errno == EINTR) {
has_intrsig:
restore_pipe(opipe);
if (opipe)
restore_pipe();
/* give the user a chance to ^C out */
intrcheck();
/* interrupted, try again */
@ -3811,7 +3830,8 @@ c_cat(const char **wp)
} while (*wp);
out:
restore_pipe(opipe);
if (opipe)
restore_pipe();
free_osfunc(buf);
return (rv);
}

21
histrap.c
View File

@ -27,7 +27,7 @@
#include <sys/file.h>
#endif
__RCSID("$MirOS: src/bin/mksh/histrap.c,v 1.158 2016/08/04 20:31:00 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/histrap.c,v 1.159 2016/11/11 18:44:32 tg Exp $");
Trap sigtraps[ksh_NSIG + 1];
static struct sigaction Sigact_ign;
@ -1399,33 +1399,32 @@ settrap(Trap *p, const char *s)
}
/*
* Called by c_print() when writing to a co-process to ensure SIGPIPE won't
* kill shell (unless user catches it and exits)
* called by c_print() when writing to a co-process to ensure
* SIGPIPE won't kill shell (unless user catches it and exits)
*/
int
bool
block_pipe(void)
{
int restore_dfl = 0;
bool restore_dfl = false;
Trap *p = &sigtraps[SIGPIPE];
if (!(p->flags & (TF_ORIG_IGN|TF_ORIG_DFL))) {
setsig(p, SIG_IGN, SS_RESTORE_CURR);
if (p->flags & TF_ORIG_DFL)
restore_dfl = 1;
restore_dfl = true;
} else if (p->cursig == SIG_DFL) {
setsig(p, SIG_IGN, SS_RESTORE_CURR);
/* restore to SIG_DFL */
restore_dfl = 1;
restore_dfl = true;
}
return (restore_dfl);
}
/* Called by c_print() to undo whatever block_pipe() did */
/* called by c_print() to undo whatever block_pipe() did */
void
restore_pipe(int restore_dfl)
restore_pipe(void)
{
if (restore_dfl)
setsig(&sigtraps[SIGPIPE], SIG_DFL, SS_RESTORE_CURR);
setsig(&sigtraps[SIGPIPE], SIG_DFL, SS_RESTORE_CURR);
}
/*