749 lines
17 KiB
C
749 lines
17 KiB
C
/*-
|
|
* Copyright (c) 1980, 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)exec.c 8.1 (Berkeley) 5/31/93";
|
|
#else
|
|
static const char rcsid[] =
|
|
"$Id: exec.c,v 1.6 1997/02/22 14:01:50 peter Exp $";
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <dirent.h>
|
|
#include <fcntl.h>
|
|
#include <sys/stat.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#if __STDC__
|
|
# include <stdarg.h>
|
|
#else
|
|
# include <varargs.h>
|
|
#endif
|
|
|
|
#include "csh.h"
|
|
#include "extern.h"
|
|
|
|
/*
|
|
* System level search and execute of a command. We look in each directory
|
|
* for the specified command name. If the name contains a '/' then we
|
|
* execute only the full path name. If there is no search path then we
|
|
* execute only full path names.
|
|
*/
|
|
extern char **environ;
|
|
|
|
/*
|
|
* As we search for the command we note the first non-trivial error
|
|
* message for presentation to the user. This allows us often
|
|
* to show that a file has the wrong mode/no access when the file
|
|
* is not in the last component of the search path, so we must
|
|
* go on after first detecting the error.
|
|
*/
|
|
static char *exerr; /* Execution error message */
|
|
static Char *expath; /* Path for exerr */
|
|
|
|
/*
|
|
* Xhash is an array of HSHSIZ bits (HSHSIZ / 8 chars), which are used
|
|
* to hash execs. If it is allocated (havhash true), then to tell
|
|
* whether ``name'' is (possibly) present in the i'th component
|
|
* of the variable path, you look at the bit in xhash indexed by
|
|
* hash(hashname("name"), i). This is setup automatically
|
|
* after .login is executed, and recomputed whenever ``path'' is
|
|
* changed.
|
|
* The two part hash function is designed to let texec() call the
|
|
* more expensive hashname() only once and the simple hash() several
|
|
* times (once for each path component checked).
|
|
* Byte size is assumed to be 8.
|
|
*/
|
|
#define HSHSIZ 8192 /* 1k bytes */
|
|
#define HSHMASK (HSHSIZ - 1)
|
|
#define HSHMUL 243
|
|
static char xhash[HSHSIZ / 8];
|
|
|
|
#define hash(a, b) (((a) * HSHMUL + (b)) & HSHMASK)
|
|
#define bit(h, b) ((h)[(b) >> 3] & 1 << ((b) & 7)) /* bit test */
|
|
#define bis(h, b) ((h)[(b) >> 3] |= 1 << ((b) & 7)) /* bit set */
|
|
static int hits, misses;
|
|
|
|
/* Dummy search path for just absolute search when no path */
|
|
static Char *justabs[] = {STRNULL, 0};
|
|
|
|
static void pexerr __P((void));
|
|
static void texec __P((Char *, Char **));
|
|
static int hashname __P((Char *));
|
|
static void tellmewhat __P((struct wordent *));
|
|
static int executable __P((Char *, Char *, bool));
|
|
static int iscommand __P((Char *));
|
|
|
|
|
|
void
|
|
/*ARGSUSED*/
|
|
doexec(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
Char *dp, **pv, **av, *sav;
|
|
struct varent *pathv;
|
|
bool slash;
|
|
int hashval = 0, hashval1, i;
|
|
Char *blk[2];
|
|
|
|
/*
|
|
* Glob the command name. We will search $path even if this does something,
|
|
* as in sh but not in csh. One special case: if there is no PATH, then we
|
|
* execute only commands which start with '/'.
|
|
*/
|
|
blk[0] = t->t_dcom[0];
|
|
blk[1] = 0;
|
|
gflag = 0, tglob(blk);
|
|
if (gflag) {
|
|
pv = globall(blk);
|
|
if (pv == 0) {
|
|
setname(vis_str(blk[0]));
|
|
stderror(ERR_NAME | ERR_NOMATCH);
|
|
}
|
|
gargv = 0;
|
|
}
|
|
else
|
|
pv = saveblk(blk);
|
|
|
|
trim(pv);
|
|
|
|
exerr = 0;
|
|
expath = Strsave(pv[0]);
|
|
Vexpath = expath;
|
|
|
|
pathv = adrof(STRpath);
|
|
if (pathv == 0 && expath[0] != '/') {
|
|
blkfree(pv);
|
|
pexerr();
|
|
}
|
|
slash = any(short2str(expath), '/');
|
|
|
|
/*
|
|
* Glob the argument list, if necessary. Otherwise trim off the quote bits.
|
|
*/
|
|
gflag = 0;
|
|
av = &t->t_dcom[1];
|
|
tglob(av);
|
|
if (gflag) {
|
|
av = globall(av);
|
|
if (av == 0) {
|
|
blkfree(pv);
|
|
setname(vis_str(expath));
|
|
stderror(ERR_NAME | ERR_NOMATCH);
|
|
}
|
|
gargv = 0;
|
|
}
|
|
else
|
|
av = saveblk(av);
|
|
|
|
blkfree(t->t_dcom);
|
|
t->t_dcom = blkspl(pv, av);
|
|
xfree((ptr_t) pv);
|
|
xfree((ptr_t) av);
|
|
av = t->t_dcom;
|
|
trim(av);
|
|
|
|
if (*av == NULL || **av == '\0')
|
|
pexerr();
|
|
|
|
xechoit(av); /* Echo command if -x */
|
|
/*
|
|
* Since all internal file descriptors are set to close on exec, we don't
|
|
* need to close them explicitly here. Just reorient ourselves for error
|
|
* messages.
|
|
*/
|
|
SHIN = 0;
|
|
SHOUT = 1;
|
|
SHERR = 2;
|
|
OLDSTD = 0;
|
|
/*
|
|
* We must do this AFTER any possible forking (like `foo` in glob) so that
|
|
* this shell can still do subprocesses.
|
|
*/
|
|
(void) sigsetmask((sigset_t) 0);
|
|
/*
|
|
* If no path, no words in path, or a / in the filename then restrict the
|
|
* command search.
|
|
*/
|
|
if (pathv == 0 || pathv->vec[0] == 0 || slash)
|
|
pv = justabs;
|
|
else
|
|
pv = pathv->vec;
|
|
sav = Strspl(STRslash, *av);/* / command name for postpending */
|
|
Vsav = sav;
|
|
if (havhash)
|
|
hashval = hashname(*av);
|
|
i = 0;
|
|
hits++;
|
|
do {
|
|
/*
|
|
* Try to save time by looking at the hash table for where this command
|
|
* could be. If we are doing delayed hashing, then we put the names in
|
|
* one at a time, as the user enters them. This is kinda like Korn
|
|
* Shell's "tracked aliases".
|
|
*/
|
|
if (!slash && pv[0][0] == '/' && havhash) {
|
|
hashval1 = hash(hashval, i);
|
|
if (!bit(xhash, hashval1))
|
|
goto cont;
|
|
}
|
|
if (pv[0][0] == 0 || eq(pv[0], STRdot)) /* don't make ./xxx */
|
|
texec(*av, av);
|
|
else {
|
|
dp = Strspl(*pv, sav);
|
|
Vdp = dp;
|
|
texec(dp, av);
|
|
Vdp = 0;
|
|
xfree((ptr_t) dp);
|
|
}
|
|
misses++;
|
|
cont:
|
|
pv++;
|
|
i++;
|
|
} while (*pv);
|
|
hits--;
|
|
Vsav = 0;
|
|
xfree((ptr_t) sav);
|
|
pexerr();
|
|
}
|
|
|
|
static void
|
|
pexerr()
|
|
{
|
|
/* Couldn't find the damn thing */
|
|
if (expath) {
|
|
setname(vis_str(expath));
|
|
Vexpath = 0;
|
|
xfree((ptr_t) expath);
|
|
expath = 0;
|
|
}
|
|
else
|
|
setname("");
|
|
if (exerr)
|
|
stderror(ERR_NAME | ERR_STRING, exerr);
|
|
stderror(ERR_NAME | ERR_COMMAND);
|
|
}
|
|
|
|
/*
|
|
* Execute command f, arg list t.
|
|
* Record error message if not found.
|
|
* Also do shell scripts here.
|
|
*/
|
|
static void
|
|
texec(sf, st)
|
|
Char *sf;
|
|
Char **st;
|
|
{
|
|
char **t;
|
|
char *f;
|
|
struct varent *v;
|
|
Char **vp;
|
|
Char *lastsh[2];
|
|
int fd;
|
|
unsigned char c;
|
|
Char *st0, **ost;
|
|
|
|
/* The order for the conversions is significant */
|
|
t = short2blk(st);
|
|
f = short2str(sf);
|
|
Vt = t;
|
|
errno = 0; /* don't use a previous error */
|
|
(void) execve(f, t, environ);
|
|
Vt = 0;
|
|
blkfree((Char **) t);
|
|
switch (errno) {
|
|
|
|
case ENOEXEC:
|
|
/*
|
|
* From: casper@fwi.uva.nl (Casper H.S. Dik) If we could not execute
|
|
* it, don't feed it to the shell if it looks like a binary!
|
|
*/
|
|
if ((fd = open(f, O_RDONLY)) != -1) {
|
|
if (read(fd, (char *) &c, 1) == 1) {
|
|
if (!Isprint(c) && (c != '\n' && c != '\t')) {
|
|
(void) close(fd);
|
|
/*
|
|
* We *know* what ENOEXEC means.
|
|
*/
|
|
stderror(ERR_ARCH, f, strerror(errno));
|
|
}
|
|
}
|
|
#ifdef _PATH_BSHELL
|
|
else
|
|
c = '#';
|
|
#endif
|
|
(void) close(fd);
|
|
}
|
|
/*
|
|
* If there is an alias for shell, then put the words of the alias in
|
|
* front of the argument list replacing the command name. Note no
|
|
* interpretation of the words at this point.
|
|
*/
|
|
v = adrof1(STRshell, &aliases);
|
|
if (v == 0) {
|
|
vp = lastsh;
|
|
vp[0] = adrof(STRshell) ? value(STRshell) : STR_SHELLPATH;
|
|
vp[1] = NULL;
|
|
#ifdef _PATH_BSHELL
|
|
if (fd != -1 && c != '#')
|
|
vp[0] = STR_BSHELL;
|
|
#endif
|
|
}
|
|
else
|
|
vp = v->vec;
|
|
st0 = st[0];
|
|
st[0] = sf;
|
|
ost = st;
|
|
st = blkspl(vp, st); /* Splice up the new arglst */
|
|
ost[0] = st0;
|
|
sf = *st;
|
|
/* The order for the conversions is significant */
|
|
t = short2blk(st);
|
|
f = short2str(sf);
|
|
xfree((ptr_t) st);
|
|
Vt = t;
|
|
(void) execve(f, t, environ);
|
|
Vt = 0;
|
|
blkfree((Char **) t);
|
|
/* The sky is falling, the sky is falling! */
|
|
|
|
case ENOMEM:
|
|
stderror(ERR_SYSTEM, f, strerror(errno));
|
|
|
|
case ENOENT:
|
|
break;
|
|
|
|
default:
|
|
if (exerr == 0) {
|
|
exerr = strerror(errno);
|
|
if (expath)
|
|
xfree((ptr_t) expath);
|
|
expath = Strsave(sf);
|
|
Vexpath = expath;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
void
|
|
execash(t, kp)
|
|
Char **t;
|
|
struct command *kp;
|
|
{
|
|
int saveIN, saveOUT, saveDIAG, saveSTD;
|
|
int oSHIN;
|
|
int oSHOUT;
|
|
int oSHERR;
|
|
int oOLDSTD;
|
|
jmp_buf osetexit;
|
|
int my_reenter;
|
|
int odidfds;
|
|
sig_t osigint, osigquit, osigterm;
|
|
|
|
if (chkstop == 0 && setintr)
|
|
panystop(0);
|
|
/*
|
|
* Hmm, we don't really want to do that now because we might
|
|
* fail, but what is the choice
|
|
*/
|
|
rechist();
|
|
|
|
osigint = signal(SIGINT, parintr);
|
|
osigquit = signal(SIGQUIT, parintr);
|
|
osigterm = signal(SIGTERM, parterm);
|
|
|
|
odidfds = didfds;
|
|
oSHIN = SHIN;
|
|
oSHOUT = SHOUT;
|
|
oSHERR = SHERR;
|
|
oOLDSTD = OLDSTD;
|
|
|
|
saveIN = dcopy(SHIN, -1);
|
|
saveOUT = dcopy(SHOUT, -1);
|
|
saveDIAG = dcopy(SHERR, -1);
|
|
saveSTD = dcopy(OLDSTD, -1);
|
|
|
|
lshift(kp->t_dcom, 1);
|
|
|
|
getexit(osetexit);
|
|
|
|
if ((my_reenter = setexit()) == 0) {
|
|
SHIN = dcopy(0, -1);
|
|
SHOUT = dcopy(1, -1);
|
|
SHERR = dcopy(2, -1);
|
|
didfds = 0;
|
|
doexec(t, kp);
|
|
}
|
|
|
|
(void) signal(SIGINT, osigint);
|
|
(void) signal(SIGQUIT, osigquit);
|
|
(void) signal(SIGTERM, osigterm);
|
|
|
|
doneinp = 0;
|
|
didfds = odidfds;
|
|
(void) close(SHIN);
|
|
(void) close(SHOUT);
|
|
(void) close(SHERR);
|
|
(void) close(OLDSTD);
|
|
SHIN = dmove(saveIN, oSHIN);
|
|
SHOUT = dmove(saveOUT, oSHOUT);
|
|
SHERR = dmove(saveDIAG, oSHERR);
|
|
OLDSTD = dmove(saveSTD, oOLDSTD);
|
|
|
|
resexit(osetexit);
|
|
if (my_reenter)
|
|
stderror(ERR_SILENT);
|
|
}
|
|
|
|
void
|
|
xechoit(t)
|
|
Char **t;
|
|
{
|
|
if (adrof(STRecho)) {
|
|
(void) fflush(csherr);
|
|
blkpr(csherr, t);
|
|
(void) fputc('\n', csherr);
|
|
}
|
|
}
|
|
|
|
void
|
|
/*ARGSUSED*/
|
|
dohash(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
DIR *dirp;
|
|
struct dirent *dp;
|
|
int cnt;
|
|
int i = 0;
|
|
struct varent *pathv = adrof(STRpath);
|
|
Char **pv;
|
|
int hashval;
|
|
|
|
havhash = 1;
|
|
for (cnt = 0; cnt < sizeof xhash; cnt++)
|
|
xhash[cnt] = 0;
|
|
if (pathv == 0)
|
|
return;
|
|
for (pv = pathv->vec; *pv; pv++, i++) {
|
|
if (pv[0][0] != '/')
|
|
continue;
|
|
dirp = opendir(short2str(*pv));
|
|
if (dirp == NULL)
|
|
continue;
|
|
while ((dp = readdir(dirp)) != NULL) {
|
|
if (dp->d_ino == 0)
|
|
continue;
|
|
if (dp->d_name[0] == '.' &&
|
|
(dp->d_name[1] == '\0' ||
|
|
(dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
|
|
continue;
|
|
hashval = hash(hashname(str2short(dp->d_name)), i);
|
|
bis(xhash, hashval);
|
|
/* tw_add_comm_name (dp->d_name); */
|
|
}
|
|
(void) closedir(dirp);
|
|
}
|
|
}
|
|
|
|
void
|
|
/*ARGSUSED*/
|
|
dounhash(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
havhash = 0;
|
|
}
|
|
|
|
void
|
|
/*ARGSUSED*/
|
|
hashstat(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
if (hits + misses)
|
|
(void) fprintf(cshout, "%d hits, %d misses, %d%%\n",
|
|
hits, misses, 100 * hits / (hits + misses));
|
|
}
|
|
|
|
/*
|
|
* Hash a command name.
|
|
*/
|
|
static int
|
|
hashname(cp)
|
|
Char *cp;
|
|
{
|
|
long h = 0;
|
|
|
|
while (*cp)
|
|
h = hash(h, *cp++);
|
|
return ((int) h);
|
|
}
|
|
|
|
static int
|
|
iscommand(name)
|
|
Char *name;
|
|
{
|
|
Char **pv;
|
|
Char *sav;
|
|
struct varent *v;
|
|
bool slash = any(short2str(name), '/');
|
|
int hashval = 0, hashval1, i;
|
|
|
|
v = adrof(STRpath);
|
|
if (v == 0 || v->vec[0] == 0 || slash)
|
|
pv = justabs;
|
|
else
|
|
pv = v->vec;
|
|
sav = Strspl(STRslash, name); /* / command name for postpending */
|
|
if (havhash)
|
|
hashval = hashname(name);
|
|
i = 0;
|
|
do {
|
|
if (!slash && pv[0][0] == '/' && havhash) {
|
|
hashval1 = hash(hashval, i);
|
|
if (!bit(xhash, hashval1))
|
|
goto cont;
|
|
}
|
|
if (pv[0][0] == 0 || eq(pv[0], STRdot)) { /* don't make ./xxx */
|
|
if (executable(NULL, name, 0)) {
|
|
xfree((ptr_t) sav);
|
|
return i + 1;
|
|
}
|
|
}
|
|
else {
|
|
if (executable(*pv, sav, 0)) {
|
|
xfree((ptr_t) sav);
|
|
return i + 1;
|
|
}
|
|
}
|
|
cont:
|
|
pv++;
|
|
i++;
|
|
} while (*pv);
|
|
xfree((ptr_t) sav);
|
|
return 0;
|
|
}
|
|
|
|
/* Also by:
|
|
* Andreas Luik <luik@isaak.isa.de>
|
|
* I S A GmbH - Informationssysteme fuer computerintegrierte Automatisierung
|
|
* Azenberstr. 35
|
|
* D-7000 Stuttgart 1
|
|
* West-Germany
|
|
* is the executable() routine below and changes to iscommand().
|
|
* Thanks again!!
|
|
*/
|
|
|
|
/*
|
|
* executable() examines the pathname obtained by concatenating dir and name
|
|
* (dir may be NULL), and returns 1 either if it is executable by us, or
|
|
* if dir_ok is set and the pathname refers to a directory.
|
|
* This is a bit kludgy, but in the name of optimization...
|
|
*/
|
|
static int
|
|
executable(dir, name, dir_ok)
|
|
Char *dir, *name;
|
|
bool dir_ok;
|
|
{
|
|
struct stat stbuf;
|
|
Char path[MAXPATHLEN + 1], *dp, *sp;
|
|
char *strname;
|
|
|
|
if (dir && *dir) {
|
|
for (dp = path, sp = dir; *sp; *dp++ = *sp++)
|
|
if (dp == &path[MAXPATHLEN + 1]) {
|
|
*--dp = '\0';
|
|
break;
|
|
}
|
|
for (sp = name; *sp; *dp++ = *sp++)
|
|
if (dp == &path[MAXPATHLEN + 1]) {
|
|
*--dp = '\0';
|
|
break;
|
|
}
|
|
*dp = '\0';
|
|
strname = short2str(path);
|
|
}
|
|
else
|
|
strname = short2str(name);
|
|
return (stat(strname, &stbuf) != -1 &&
|
|
((S_ISREG(stbuf.st_mode) &&
|
|
/* save time by not calling access() in the hopeless case */
|
|
(stbuf.st_mode & (S_IXOTH | S_IXGRP | S_IXUSR)) &&
|
|
access(strname, X_OK) == 0) ||
|
|
(dir_ok && S_ISDIR(stbuf.st_mode))));
|
|
}
|
|
|
|
/* The dowhich() is by:
|
|
* Andreas Luik <luik@isaak.isa.de>
|
|
* I S A GmbH - Informationssysteme fuer computerintegrierte Automatisierung
|
|
* Azenberstr. 35
|
|
* D-7000 Stuttgart 1
|
|
* West-Germany
|
|
* Thanks!!
|
|
*/
|
|
/*ARGSUSED*/
|
|
void
|
|
dowhich(v, c)
|
|
Char **v;
|
|
struct command *c;
|
|
{
|
|
struct wordent lex[3];
|
|
struct varent *vp;
|
|
|
|
lex[0].next = &lex[1];
|
|
lex[1].next = &lex[2];
|
|
lex[2].next = &lex[0];
|
|
|
|
lex[0].prev = &lex[2];
|
|
lex[1].prev = &lex[0];
|
|
lex[2].prev = &lex[1];
|
|
|
|
lex[0].word = STRNULL;
|
|
lex[2].word = STRret;
|
|
|
|
while (*++v) {
|
|
if ((vp = adrof1(*v, &aliases)) != NULL) {
|
|
(void) fprintf(cshout, "%s: \t aliased to ", vis_str(*v));
|
|
blkpr(cshout, vp->vec);
|
|
(void) fputc('\n', cshout);
|
|
}
|
|
else {
|
|
lex[1].word = *v;
|
|
tellmewhat(lex);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
tellmewhat(lex)
|
|
struct wordent *lex;
|
|
{
|
|
int i;
|
|
struct biltins *bptr;
|
|
struct wordent *sp = lex->next;
|
|
bool aliased = 0;
|
|
Char *s0, *s1, *s2, *cmd;
|
|
Char qc;
|
|
|
|
if (adrof1(sp->word, &aliases)) {
|
|
alias(lex);
|
|
sp = lex->next;
|
|
aliased = 1;
|
|
}
|
|
|
|
s0 = sp->word; /* to get the memory freeing right... */
|
|
|
|
/* handle quoted alias hack */
|
|
if ((*(sp->word) & (QUOTE | TRIM)) == QUOTE)
|
|
(sp->word)++;
|
|
|
|
/* do quoting, if it hasn't been done */
|
|
s1 = s2 = sp->word;
|
|
while (*s2)
|
|
switch (*s2) {
|
|
case '\'':
|
|
case '"':
|
|
qc = *s2++;
|
|
while (*s2 && *s2 != qc)
|
|
*s1++ = *s2++ | QUOTE;
|
|
if (*s2)
|
|
s2++;
|
|
break;
|
|
case '\\':
|
|
if (*++s2)
|
|
*s1++ = *s2++ | QUOTE;
|
|
break;
|
|
default:
|
|
*s1++ = *s2++;
|
|
}
|
|
*s1 = '\0';
|
|
|
|
for (bptr = bfunc; bptr < &bfunc[nbfunc]; bptr++) {
|
|
if (eq(sp->word, str2short(bptr->bname))) {
|
|
if (aliased)
|
|
prlex(cshout, lex);
|
|
(void) fprintf(cshout, "%s: shell built-in command.\n",
|
|
vis_str(sp->word));
|
|
sp->word = s0; /* we save and then restore this */
|
|
return;
|
|
}
|
|
}
|
|
|
|
sp->word = cmd = globone(sp->word, G_IGNORE);
|
|
|
|
if ((i = iscommand(strip(sp->word))) != 0) {
|
|
Char **pv;
|
|
struct varent *v;
|
|
bool slash = any(short2str(sp->word), '/');
|
|
|
|
v = adrof(STRpath);
|
|
if (v == 0 || v->vec[0] == 0 || slash)
|
|
pv = justabs;
|
|
else
|
|
pv = v->vec;
|
|
|
|
while (--i)
|
|
pv++;
|
|
if (pv[0][0] == 0 || eq(pv[0], STRdot)) {
|
|
if (!slash) {
|
|
sp->word = Strspl(STRdotsl, sp->word);
|
|
prlex(cshout, lex);
|
|
xfree((ptr_t) sp->word);
|
|
} else
|
|
prlex(cshout, lex);
|
|
sp->word = s0; /* we save and then restore this */
|
|
xfree((ptr_t) cmd);
|
|
return;
|
|
}
|
|
s1 = Strspl(*pv, STRslash);
|
|
sp->word = Strspl(s1, sp->word);
|
|
xfree((ptr_t) s1);
|
|
prlex(cshout, lex);
|
|
xfree((ptr_t) sp->word);
|
|
}
|
|
else {
|
|
if (aliased)
|
|
prlex(cshout, lex);
|
|
(void) fprintf(csherr, "%s: Command not found.\n", vis_str(sp->word));
|
|
}
|
|
xfree((ptr_t) cmd);
|
|
sp->word = s0; /* we save and then restore this */
|
|
}
|