JehanneOS/mksh
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
899ddca642
mksh/edit.c
tg 4ea65e6edc Merge import of OpenBSD source, ports and XF4 tree. 
While here,
o clean up differences where possible
o whitespace cleanup
o ifdef ./. if defined()
o '...' ./. "..."
o echo foo > bar ./. echo foo >bar
o `...` ./. $(...) ./. $$(...)
o `...' ./. '...'
o modernize "our" tree, e.g. WWW in ports
o fix some typos and brainos introduced when renaming OpenBSD to MirBSD
o use hardware 80387 by default
o migrate Apache 1.3.28 OpenBSD ./. MirBSD ./. KAME
o work around as many CVS bugs as possible (add back/delete files, ...)

Synchronize stuff, ready for ongoing changes.
2003-08-31 20:54:03 +00:00

1085 lines
23 KiB
C
Raw Blame History

/* $MirBSD: edit.c,v 1.4 2003/08/31 20:54:02 tg Exp $ */
/* $OpenBSD: edit.c,v 1.18 2003/08/22 18:17:10 fgsch Exp $ */
/*
* Command line editing - common code
*
*/
#include "config.h"
#ifdef EDIT
#include "sh.h"
#include "tty.h"
#define EXTERN
#include "edit.h"
#undef EXTERN
#ifdef OS_SCO /* SCO Unix 3.2v4.1 */
# include <sys/stream.h> /* needed for <sys/ptem.h> */
# include <sys/ptem.h> /* needed for struct winsize */
#endif /* OS_SCO */
#include <sys/ioctl.h>
#include <ctype.h>
#include "ksh_stat.h"
#if defined(TIOCGWINSZ)
static RETSIGTYPE x_sigwinch ARGS((int sig));
static int got_sigwinch;
static void check_sigwinch ARGS((void));
#endif /* TIOCGWINSZ */
static int x_file_glob ARGS((int flags, const char *str, int slen,
char ***wordsp));
static int x_command_glob ARGS((int flags, const char *str, int slen,
char ***wordsp));
static int x_locate_word ARGS((const char *buf, int buflen, int pos,
int *startp, int *is_command));
static char vdisable_c;
/* Called from main */
void
x_init()
{
/* set to -2 to force initial binding */
edchars.erase = edchars.kill = edchars.intr = edchars.quit
= edchars.eof = -2;
/* default value for deficient systems */
edchars.werase = 027; /* ^W */
#ifdef TIOCGWINSZ
# ifdef SIGWINCH
if (setsig(&sigtraps[SIGWINCH], x_sigwinch, SS_RESTORE_ORIG|SS_SHTRAP))
sigtraps[SIGWINCH].flags |= TF_SHELL_USES;
# endif /* SIGWINCH */
got_sigwinch = 1; /* force initial check */
check_sigwinch();
#endif /* TIOCGWINSZ */
#ifdef EMACS
x_init_emacs();
#endif /* EMACS */
/* Bizarreness to figure out how to disable
* a struct termios.c_cc[] char
*/
#ifdef _POSIX_VDISABLE
if (_POSIX_VDISABLE >= 0)
vdisable_c = (char) _POSIX_VDISABLE;
else
/* `feature not available' */
vdisable_c = (char) 0377;
#else
# if defined(HAVE_PATHCONF) && defined(_PC_VDISABLE)
vdisable_c = fpathconf(tty_fd, _PC_VDISABLE);
# else
vdisable_c = (char) 0377; /* default to old BSD value */
# endif
#endif /* _POSIX_VDISABLE */
}
#if defined(TIOCGWINSZ)
static RETSIGTYPE
x_sigwinch(sig)
int sig;
{
got_sigwinch = 1;
return RETSIGVAL;
}
static void
check_sigwinch ARGS((void))
{
if (got_sigwinch) {
struct winsize ws;
got_sigwinch = 0;
if (procpid == kshpid && ioctl(tty_fd, TIOCGWINSZ, &ws) >= 0) {
struct tbl *vp;
/* Do NOT export COLUMNS/LINES. Many applications
* check COLUMNS/LINES before checking ws.ws_col/row,
* so if the app is started with C/L in the environ
* and the window is then resized, the app won't
* see the change cause the environ doesn't change.
*/
if (ws.ws_col) {
x_cols = ws.ws_col < MIN_COLS ? MIN_COLS
: ws.ws_col;
if ((vp = typeset("COLUMNS", 0, 0, 0, 0)))
setint(vp, (long) ws.ws_col);
}
if (ws.ws_row
&& (vp = typeset("LINES", 0, 0, 0, 0)))
setint(vp, (long) ws.ws_row);
}
}
}
#endif /* TIOCGWINSZ */
/*
* read an edited command line
*/
int
x_read(buf, len)
char *buf;
size_t len;
{
int i;
#if defined(TIOCGWINSZ)
if (got_sigwinch)
check_sigwinch();
#endif /* TIOCGWINSZ */
x_mode(TRUE);
#ifdef EMACS
if (Flag(FEMACS) || Flag(FGMACS))
i = x_emacs(buf, len);
else
#endif
#ifdef VI
if (Flag(FVI))
i = x_vi(buf, len);
else
#endif
i = -1; /* internal error */
x_mode(FALSE);
return i;
}
/* tty I/O */
int
x_getc()
{
#ifdef OS2
unsigned char c = _read_kbd(0, 1, 0);
return c == 0 ? 0xE0 : c;
#else /* OS2 */
char c;
int n;
while ((n = blocking_read(0, &c, 1)) < 0 && errno == EINTR)
if (trap) {
x_mode(FALSE);
runtraps(0);
x_mode(TRUE);
}
if (n != 1)
return -1;
return (int) (unsigned char) c;
#endif /* OS2 */
}
void
x_flush()
{
shf_flush(shl_out);
}
void
x_putc(c)
int c;
{
shf_putc(c, shl_out);
}
void
x_puts(s)
const char *s;
{
while (*s != 0)
shf_putc(*s++, shl_out);
}
bool_t
x_mode(onoff)
bool_t onoff;
{
static bool_t x_cur_mode;
bool_t prev;
if (x_cur_mode == onoff)
return x_cur_mode;
prev = x_cur_mode;
x_cur_mode = onoff;
if (onoff) {
TTY_state cb;
X_chars oldchars;
oldchars = edchars;
cb = tty_state;
#if defined(HAVE_TERMIOS_H) || defined(HAVE_TERMIO_H)
edchars.erase = cb.c_cc[VERASE];
edchars.kill = cb.c_cc[VKILL];
edchars.intr = cb.c_cc[VINTR];
edchars.quit = cb.c_cc[VQUIT];
edchars.eof = cb.c_cc[VEOF];
# ifdef VWERASE
edchars.werase = cb.c_cc[VWERASE];
# endif
# ifdef _CRAY2 /* brain-damaged terminal handler */
cb.c_lflag &= ~(ICANON|ECHO);
/* rely on print routine to map '\n' to CR,LF */
# else
cb.c_iflag &= ~(INLCR|ICRNL);
# ifdef _BSD_SYSV /* need to force CBREAK instead of RAW (need CRMOD on output) */
cb.c_lflag &= ~(ICANON|ECHO);
# else
# ifdef SWTCH /* need CBREAK to handle swtch char */
cb.c_lflag &= ~(ICANON|ECHO);
cb.c_lflag |= ISIG;
cb.c_cc[VINTR] = vdisable_c;
cb.c_cc[VQUIT] = vdisable_c;
# else
cb.c_lflag &= ~(ISIG|ICANON|ECHO);
# endif
# endif
# ifdef VLNEXT
/* osf/1 processes lnext when ~icanon */
cb.c_cc[VLNEXT] = vdisable_c;
# endif /* VLNEXT */
# ifdef VDISCARD
/* sunos 4.1.x & osf/1 processes discard(flush) when ~icanon */
cb.c_cc[VDISCARD] = vdisable_c;
# endif /* VDISCARD */
cb.c_cc[VTIME] = 0;
cb.c_cc[VMIN] = 1;
# endif /* _CRAY2 */
#else
/* Assume BSD tty stuff. */
edchars.erase = cb.sgttyb.sg_erase;
edchars.kill = cb.sgttyb.sg_kill;
cb.sgttyb.sg_flags &= ~ECHO;
cb.sgttyb.sg_flags |= CBREAK;
# ifdef TIOCGATC
edchars.intr = cb.lchars.tc_intrc;
edchars.quit = cb.lchars.tc_quitc;
edchars.eof = cb.lchars.tc_eofc;
edchars.werase = cb.lchars.tc_werasc;
cb.lchars.tc_suspc = -1;
cb.lchars.tc_dsuspc = -1;
cb.lchars.tc_lnextc = -1;
cb.lchars.tc_statc = -1;
cb.lchars.tc_intrc = -1;
cb.lchars.tc_quitc = -1;
cb.lchars.tc_rprntc = -1;
# else
edchars.intr = cb.tchars.t_intrc;
edchars.quit = cb.tchars.t_quitc;
edchars.eof = cb.tchars.t_eofc;
cb.tchars.t_intrc = -1;
cb.tchars.t_quitc = -1;
# ifdef TIOCGLTC
edchars.werase = cb.ltchars.t_werasc;
cb.ltchars.t_suspc = -1;
cb.ltchars.t_dsuspc = -1;
cb.ltchars.t_lnextc = -1;
cb.ltchars.t_rprntc = -1;
# endif
# endif /* TIOCGATC */
#endif /* HAVE_TERMIOS_H || HAVE_TERMIO_H */
set_tty(tty_fd, &cb, TF_WAIT);
#ifdef __CYGWIN__
if (edchars.eof == '\0')
edchars.eof = '\4';
#endif /* __CYGWIN__ */
/* Convert unset values to internal `unset' value */
if (edchars.erase == vdisable_c)
edchars.erase = -1;
if (edchars.kill == vdisable_c)
edchars.kill = -1;
if (edchars.intr == vdisable_c)
edchars.intr = -1;
if (edchars.quit == vdisable_c)
edchars.quit = -1;
if (edchars.eof == vdisable_c)
edchars.eof = -1;
if (edchars.werase == vdisable_c)
edchars.werase = -1;
if (memcmp(&edchars, &oldchars, sizeof(edchars)) != 0) {
#ifdef EMACS
x_emacs_keys(&edchars);
#endif
}
} else {
/* TF_WAIT doesn't seem to be necessary when leaving xmode */
set_tty(tty_fd, &tty_state, TF_NONE);
}
return prev;
}
/* NAME:
* promptlen - calculate the length of PS1 etc.
*
* DESCRIPTION:
* This function is based on a fix from guy@demon.co.uk
* It fixes a bug in that if PS1 contains '!', the length
* given by strlen() is probably wrong.
*
* RETURN VALUE:
* length
*/
int
promptlen(cp, spp)
const char *cp;
const char **spp;
{
int count = 0;
const char *sp = cp;
char delimiter = 0;
int indelimit = 0;
/* Undocumented AT&T ksh feature:
* If the second char in the prompt string is \r then the first char
* is taken to be a non-printing delimiter and any chars between two
* instances of the delimiter are not considered to be part of the
* prompt length
*/
if (*cp && cp[1] == '\r') {
delimiter = *cp;
cp += 2;
}
for (; *cp; cp++) {
if (indelimit && *cp != delimiter)
;
else if (*cp == '\n' || *cp == '\r') {
count = 0;
sp = cp + 1;
} else if (*cp == '\t') {
count = (count | 7) + 1;
} else if (*cp == '\b') {
if (count > 0)
count--;
} else if (*cp == delimiter)
indelimit = !indelimit;
else
count++;
}
if (spp)
*spp = sp;
return count;
}
void
set_editmode(ed)
const char *ed;
{
static const enum sh_flag edit_flags[] = {
#ifdef EMACS
FEMACS, FGMACS,
#endif
#ifdef VI
FVI,
#endif
};
char *rcp;
int i;
if ((rcp = ksh_strrchr_dirsep(ed)))
ed = ++rcp;
for (i = 0; i < NELEM(edit_flags); i++)
if (strstr(ed, options[(int) edit_flags[i]].name)) {
change_flag(edit_flags[i], OF_SPECIAL, 1);
return;
}
}
/* ------------------------------------------------------------------------- */
/* Misc common code for vi/emacs */
/* Handle the commenting/uncommenting of a line.
* Returns:
* 1 if a carriage return is indicated (comment added)
* 0 if no return (comment removed)
* -1 if there is an error (not enough room for comment chars)
* If successful, *lenp contains the new length. Note: cursor should be
* moved to the start of the line after (un)commenting.
*/
int
x_do_comment(buf, bsize, lenp)
char *buf;
int bsize;
int *lenp;
{
int i, j;
int len = *lenp;
if (len == 0)
return 1; /* somewhat arbitrary - it's what at&t ksh does */
/* Already commented? */
if (buf[0] == '#') {
int saw_nl = 0;
for (j = 0, i = 1; i < len; i++) {
if (!saw_nl || buf[i] != '#')
buf[j++] = buf[i];
saw_nl = buf[i] == '\n';
}
*lenp = j;
return 0;
} else {
int n = 1;
/* See if there's room for the #'s - 1 per \n */
for (i = 0; i < len; i++)
if (buf[i] == '\n')
n++;
if (len + n >= bsize)
return -1;
/* Now add them... */
for (i = len, j = len + n; --i >= 0; ) {
if (buf[i] == '\n')
buf[--j] = '#';
buf[--j] = buf[i];
}
buf[0] = '#';
*lenp += n;
return 1;
}
}
/* ------------------------------------------------------------------------- */
/* Common file/command completion code for vi/emacs */
static char *add_glob ARGS((const char *str, int slen));
static void glob_table ARGS((const char *pat, XPtrV *wp, struct table *tp));
static void glob_path ARGS((int flags, const char *pat, XPtrV *wp,
const char *path));
#if 0 /* not used... */
int x_complete_word ARGS((const char *str, int slen, int is_command,
int *multiple, char **ret));
int
x_complete_word(str, slen, is_command, nwordsp, ret)
const char *str;
int slen;
int is_command;
int *nwordsp;
char **ret;
{
int nwords;
int prefix_len;
char **words;
nwords = (is_command ? x_command_glob : x_file_glob)(XCF_FULLPATH,
str, slen, &words);
*nwordsp = nwords;
if (nwords == 0) {
*ret = (char *) 0;
return -1;
}
prefix_len = x_longest_prefix(nwords, words);
*ret = str_nsave(words[0], prefix_len, ATEMP);
x_free_words(nwords, words);
return prefix_len;
}
#endif /* 0 */
void
x_print_expansions(nwords, words, is_command)
int nwords;
char *const *words;
int is_command;
{
int use_copy = 0;
int prefix_len;
XPtrV l;
/* Check if all matches are in the same directory (in this
* case, we want to omit the directory name)
*/
if (!is_command
&& (prefix_len = x_longest_prefix(nwords, words)) > 0)
{
int i;
/* Special case for 1 match (prefix is whole word) */
if (nwords == 1)
prefix_len = x_basename(words[0], (char *) 0);
/* Any (non-trailing) slashes in non-common word suffixes? */
for (i = 0; i < nwords; i++)
if (x_basename(words[i] + prefix_len, (char *) 0)
> prefix_len)
break;
/* All in same directory? */
if (i == nwords) {
while (prefix_len > 0
&& !ISDIRSEP(words[0][prefix_len - 1]))
prefix_len--;
use_copy = 1;
XPinit(l, nwords + 1);
for (i = 0; i < nwords; i++)
XPput(l, words[i] + prefix_len);
XPput(l, (char *) 0);
}
}
/*
* Enumerate expansions
*/
x_putc('\r');
x_putc('\n');
pr_list(use_copy ? (char **) XPptrv(l) : words);
if (use_copy)
XPfree(l); /* not x_free_words() */
}
/*
* Do file globbing:
* - appends * to (copy of) str if no globbing chars found
* - does expansion, checks for no match, etc.
* - sets *wordsp to array of matching strings
* - returns number of matching strings
*/
static int
x_file_glob(flags, str, slen, wordsp)
int flags;
const char *str;
int slen;
char ***wordsp;
{
char *toglob;
char **words;
int nwords, i, idx, escaping;
XPtrV w;
struct source *s, *sold;
if (slen < 0)
return 0;
toglob = add_glob(str, slen);
/* remove all escaping backward slashes */
escaping = 0;
for(i = 0, idx = 0; toglob[i]; i++) {
if (toglob[i] == '\\' && !escaping) {
escaping = 1;
continue;
}
toglob[idx] = toglob[i];
idx++;
if (escaping) escaping = 0;
}
toglob[idx] = '\0';
/*
* Convert "foo*" (toglob) to an array of strings (words)
*/
sold = source;
s = pushs(SWSTR, ATEMP);
s->start = s->str = toglob;
source = s;
if (yylex(ONEWORD) != LWORD) {
source = sold;
internal_errorf(0, "fileglob: substitute error");
return 0;
}
source = sold;
XPinit(w, 32);
expand(yylval.cp, &w, DOGLOB|DOTILDE|DOMARKDIRS);
XPput(w, NULL);
words = (char **) XPclose(w);
for (nwords = 0; words[nwords]; nwords++)
;
if (nwords == 1) {
struct stat statb;
/* Check if globbing failed (returned glob pattern),
* but be careful (E.g. toglob == "ab*" when the file
* "ab*" exists is not an error).
* Also, check for empty result - happens if we tried
* to glob something which evaluated to an empty
* string (e.g., "$FOO" when there is no FOO, etc).
*/
if ((strcmp(words[0], toglob) == 0
&& stat(words[0], &statb) < 0)
|| words[0][0] == '\0')
{
x_free_words(nwords, words);
nwords = 0;
}
}
afree(toglob, ATEMP);
*wordsp = nwords ? words : (char **) 0;
return nwords;
}
/* Data structure used in x_command_glob() */
struct path_order_info {
char *word;
int base;
int path_order;
};
static int path_order_cmp(const void *aa, const void *bb);
/* Compare routine used in x_command_glob() */
static int
path_order_cmp(aa, bb)
const void *aa;
const void *bb;
{
const struct path_order_info *a = (const struct path_order_info *) aa;
const struct path_order_info *b = (const struct path_order_info *) bb;
int t;
t = FILECMP(a->word + a->base, b->word + b->base);
return t ? t : a->path_order - b->path_order;
}
static int
x_command_glob(flags, str, slen, wordsp)
int flags;
const char *str;
int slen;
char ***wordsp;
{
char *toglob;
char *pat;
char *fpath;
int nwords;
XPtrV w;
struct block *l;
if (slen < 0)
return 0;
toglob = add_glob(str, slen);
/* Convert "foo*" (toglob) to a pattern for future use */
pat = evalstr(toglob, DOPAT|DOTILDE);
afree(toglob, ATEMP);
XPinit(w, 32);
glob_table(pat, &w, &keywords);
glob_table(pat, &w, &aliases);
glob_table(pat, &w, &builtins);
for (l = e->loc; l; l = l->next)
glob_table(pat, &w, &l->funs);
glob_path(flags, pat, &w, path);
if ((fpath = str_val(global("FPATH"))) != null)
glob_path(flags, pat, &w, fpath);
nwords = XPsize(w);
if (!nwords) {
*wordsp = (char **) 0;
XPfree(w);
return 0;
}
/* Sort entries */
if (flags & XCF_FULLPATH) {
/* Sort by basename, then path order */
struct path_order_info *info;
struct path_order_info *last_info = 0;
char **words = (char **) XPptrv(w);
int path_order = 0;
int i;
info = (struct path_order_info *)
alloc(sizeof(struct path_order_info) * nwords, ATEMP);
for (i = 0; i < nwords; i++) {
info[i].word = words[i];
info[i].base = x_basename(words[i], (char *) 0);
if (!last_info || info[i].base != last_info->base
|| FILENCMP(words[i],
last_info->word, info[i].base) != 0)
{
last_info = &info[i];
path_order++;
}
info[i].path_order = path_order;
}
qsort(info, nwords, sizeof(struct path_order_info),
path_order_cmp);
for (i = 0; i < nwords; i++)
words[i] = info[i].word;
afree((void *) info, ATEMP);
} else {
/* Sort and remove duplicate entries */
char **words = (char **) XPptrv(w);
int i, j;
qsortp(XPptrv(w), (size_t) nwords, xstrcmp);
for (i = j = 0; i < nwords - 1; i++) {
if (strcmp(words[i], words[i + 1]))
words[j++] = words[i];
else
afree(words[i], ATEMP);
}
words[j++] = words[i];
nwords = j;
w.cur = (void **) &words[j];
}
XPput(w, NULL);
*wordsp = (char **) XPclose(w);
return nwords;
}
#define IS_WORDC(c) !( ctype(c, C_LEX1) || (c) == '\'' || (c) == '"' \
|| (c) == '`' || (c) == '=' || (c) == ':' )
static int
x_locate_word(buf, buflen, pos, startp, is_commandp)
const char *buf;
int buflen;
int pos;
int *startp;
int *is_commandp;
{
int p;
int start, end;
/* Bad call? Probably should report error */
if (pos < 0 || pos > buflen) {
*startp = pos;
*is_commandp = 0;
return 0;
}
/* The case where pos == buflen happens to take care of itself... */
start = pos;
/* Keep going backwards to start of word (has effect of allowing
* one blank after the end of a word)
*/
for (; (start > 0 && IS_WORDC(buf[start - 1]))
|| (start > 1 && buf[start-2] == '\\'); start--)
;
/* Go forwards to end of word */
for (end = start; end < buflen && IS_WORDC(buf[end]); end++) {
if (buf[end] == '\\' && (end+1) < buflen)
end++;
}
if (is_commandp) {
int iscmd;
/* Figure out if this is a command */
for (p = start - 1; p >= 0 && isspace(buf[p]); p--)
;
iscmd = p < 0 || strchr(";|&()`", buf[p]);
if (iscmd) {
/* If command has a /, path, etc. is not searched;
* only current directory is searched, which is just
* like file globbing.
*/
for (p = start; p < end; p++)
if (ISDIRSEP(buf[p]))
break;
iscmd = p == end;
}
*is_commandp = iscmd;
}
*startp = start;
return end - start;
}
int
x_cf_glob(flags, buf, buflen, pos, startp, endp, wordsp, is_commandp)
int flags;
const char *buf;
int buflen;
int pos;
int *startp;
int *endp;
char ***wordsp;
int *is_commandp;
{
int len;
int nwords;
char **words;
int is_command;
len = x_locate_word(buf, buflen, pos, startp, &is_command);
if (!(flags & XCF_COMMAND))
is_command = 0;
/* Don't do command globing on zero length strings - it takes too
* long and isn't very useful. File globs are more likely to be
* useful, so allow these.
*/
if (len == 0 && is_command)
return 0;
nwords = (is_command ? x_command_glob : x_file_glob)(flags,
buf + *startp, len, &words);
if (nwords == 0) {
*wordsp = (char **) 0;
return 0;
}
if (is_commandp)
*is_commandp = is_command;
*wordsp = words;
*endp = *startp + len;
return nwords;
}
/* Given a string, copy it and possibly add a '*' to the end. The
* new string is returned.
*/
static char *
add_glob(str, slen)
const char *str;
int slen;
{
char *toglob;
char *s;
bool_t saw_slash = FALSE;
if (slen < 0)
return (char *) 0;
toglob = str_nsave(str, slen + 1, ATEMP); /* + 1 for "*" */
toglob[slen] = '\0';
/*
* If the pathname contains a wildcard (an unquoted '*',
* '?', or '[') or parameter expansion ('$'), or a ~username
* with no trailing slash, then it is globbed based on that
* value (i.e., without the appended '*').
*/
for (s = toglob; *s; s++) {
if (*s == '\\' && s[1])
s++;
else if (*s == '*' || *s == '[' || *s == '?' || *s == '$'
|| (s[1] == '(' /*)*/ && strchr("*+?@!", *s)))
break;
else if (ISDIRSEP(*s))
saw_slash = TRUE;
}
if (!*s && (*toglob != '~' || saw_slash)) {
toglob[slen] = '*';
toglob[slen + 1] = '\0';
}
return toglob;
}
/*
* Find longest common prefix
*/
int
x_longest_prefix(nwords, words)
int nwords;
char *const *words;
{
int i, j;
int prefix_len;
char *p;
if (nwords <= 0)
return 0;
prefix_len = strlen(words[0]);
for (i = 1; i < nwords; i++)
for (j = 0, p = words[i]; j < prefix_len; j++)
if (FILECHCONV(p[j]) != FILECHCONV(words[0][j])) {
prefix_len = j;
break;
}
return prefix_len;
}
void
x_free_words(nwords, words)
int nwords;
char **words;
{
int i;
for (i = 0; i < nwords; i++)
if (words[i])
afree(words[i], ATEMP);
afree(words, ATEMP);
}
/* Return the offset of the basename of string s (which ends at se - need not
* be null terminated). Trailing slashes are ignored. If s is just a slash,
* then the offset is 0 (actually, length - 1).
* s Return
* /etc 1
* /etc/ 1
* /etc// 1
* /etc/fo 5
* foo 0
* /// 2
* 0
*/
int
x_basename(s, se)
const char *s;
const char *se;
{
const char *p;
if (se == (char *) 0)
se = s + strlen(s);
if (s == se)
return 0;
/* Skip trailing slashes */
for (p = se - 1; p > s && ISDIRSEP(*p); p--)
;
for (; p > s && !ISDIRSEP(*p); p--)
;
if (ISDIRSEP(*p) && p + 1 < se)
p++;
return p - s;
}
/*
* Apply pattern matching to a table: all table entries that match a pattern
* are added to wp.
*/
static void
glob_table(pat, wp, tp)
const char *pat;
XPtrV *wp;
struct table *tp;
{
struct tstate ts;
struct tbl *te;
for (twalk(&ts, tp); (te = tnext(&ts)); ) {
if (gmatch(te->name, pat, FALSE))
XPput(*wp, str_save(te->name, ATEMP));
}
}
static void
glob_path(flags, pat, wp, path)
int flags;
const char *pat;
XPtrV *wp;
const char *path;
{
const char *sp, *p;
char *xp;
int staterr;
int pathlen;
int patlen;
int oldsize, newsize, i, j;
char **words;
XString xs;
patlen = strlen(pat) + 1;
sp = path;
Xinit(xs, xp, patlen + 128, ATEMP);
while (sp) {
xp = Xstring(xs, xp);
if (!(p = strchr(sp, PATHSEP)))
p = sp + strlen(sp);
pathlen = p - sp;
if (pathlen) {
/* Copy sp into xp, stuffing any MAGIC characters
* on the way
*/
const char *s = sp;
XcheckN(xs, xp, pathlen * 2);
while (s < p) {
if (ISMAGIC(*s))
*xp++ = MAGIC;
*xp++ = *s++;
}
*xp++ = DIRSEP;
pathlen++;
}
sp = p;
XcheckN(xs, xp, patlen);
memcpy(xp, pat, patlen);
oldsize = XPsize(*wp);
glob_str(Xstring(xs, xp), wp, 1); /* mark dirs */
newsize = XPsize(*wp);
/* Check that each match is executable... */
words = (char **) XPptrv(*wp);
for (i = j = oldsize; i < newsize; i++) {
staterr = 0;
if ((search_access(words[i], X_OK, &staterr) >= 0)
|| (staterr == EISDIR)) {
words[j] = words[i];
if (!(flags & XCF_FULLPATH))
memmove(words[j], words[j] + pathlen,
strlen(words[j] + pathlen) + 1);
j++;
} else
afree(words[i], ATEMP);
}
wp->cur = (void **) &words[j];
if (!*sp++)
break;
}
Xfree(xs, xp);
}
/*
* if argument string contains any special characters, they will
* be escaped and the result will be put into edit buffer by
* keybinding-specific function
*/
int
x_escape(s, len, putbuf_func)
const char *s;
size_t len;
int putbuf_func ARGS((const char *s, size_t len));
{
size_t add, wlen;
const char *ifs = str_val(local("IFS", 0));
int rval=0;
for (add = 0, wlen = len; wlen - add > 0; add++) {
if (strchr("\\$(){}[]*&;#|<>\"'`", s[add]) || strchr(ifs, s[add])) {
if (putbuf_func(s, add) != 0) {
rval = -1;
break;
}
putbuf_func("\\", 1);
putbuf_func(&s[add], 1);
add++;
wlen -= add;
s += add;
add = -1; /* after the increment it will go to 0 */
}
}
if (wlen > 0 && rval == 0)
rval = putbuf_func(s, wlen);
return (rval);
}
#endif /* EDIT */
Reference in New Issue View Git Blame Copy Permalink