diff options
Diffstat (limited to 'sh/exec.c')
| -rw-r--r-- | sh/exec.c | 1063 |
1 files changed, 0 insertions, 1063 deletions
diff --git a/sh/exec.c b/sh/exec.c deleted file mode 100644 index fe3613f..0000000 --- a/sh/exec.c +++ /dev/null @@ -1,1063 +0,0 @@ -/* $NetBSD: exec.c,v 1.37 2003/08/07 09:05:31 agc Exp $ */ - -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * 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. 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. - */ - -#include <sys/cdefs.h> -#ifndef lint -#if 0 -static char sccsid[] = "@(#)exec.c 8.4 (Berkeley) 6/8/95"; -#else -__RCSID("$NetBSD: exec.c,v 1.37 2003/08/07 09:05:31 agc Exp $"); -#endif -#endif /* not lint */ - -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/wait.h> -#include <unistd.h> -#include <fcntl.h> -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> - -/* - * When commands are first encountered, they are entered in a hash table. - * This ensures that a full path search will not have to be done for them - * on each invocation. - * - * We should investigate converting to a linear search, even though that - * would make the command name "hash" a misnomer. - */ - -#include "shell.h" -#include "main.h" -#include "nodes.h" -#include "parser.h" -#include "redir.h" -#include "eval.h" -#include "exec.h" -#include "builtins.h" -#include "var.h" -#include "options.h" -#include "input.h" -#include "output.h" -#include "syntax.h" -#include "memalloc.h" -#include "error.h" -#include "init.h" -#include "mystring.h" -#include "show.h" -#include "jobs.h" -#include "alias.h" - - -#define CMDTABLESIZE 31 /* should be prime */ -#define ARB 1 /* actual size determined at run time */ - - - -struct tblentry { - struct tblentry *next; /* next entry in hash chain */ - union param param; /* definition of builtin function */ - short cmdtype; /* index identifying command */ - char rehash; /* if set, cd done since entry created */ - char cmdname[ARB]; /* name of command */ -}; - - -STATIC struct tblentry *cmdtable[CMDTABLESIZE]; -STATIC int builtinloc = -1; /* index in path of %builtin, or -1 */ -int exerrno = 0; /* Last exec error */ - - -STATIC void tryexec(char *, char **, char **, int); -STATIC void execinterp(char **, char **); -STATIC void printentry(struct tblentry *, int); -STATIC void clearcmdentry(int); -STATIC struct tblentry *cmdlookup(const char *, int); -STATIC void delete_cmd_entry(void); - - -extern char *const parsekwd[]; - -/* - * Exec a program. Never returns. If you change this routine, you may - * have to change the find_command routine as well. - */ - -void -shellexec(char **argv, char **envp, const char *path, int idx, int vforked) -{ - char *cmdname; - int e; - - if (strchr(argv[0], '/') != NULL) { - tryexec(argv[0], argv, envp, vforked); - e = errno; - } else { - e = ENOENT; - while ((cmdname = padvance(&path, argv[0])) != NULL) { - if (--idx < 0 && pathopt == NULL) { - tryexec(cmdname, argv, envp, vforked); - if (errno != ENOENT && errno != ENOTDIR) - e = errno; - } - stunalloc(cmdname); - } - } - - /* Map to POSIX errors */ - switch (e) { - case EACCES: - exerrno = 126; - break; - case ENOENT: - exerrno = 127; - break; - default: - exerrno = 2; - break; - } - TRACE(("shellexec failed for %s, errno %d, vforked %d, suppressint %d\n", - argv[0], e, vforked, suppressint )); - exerror(EXEXEC, "%s: %s", argv[0], errmsg(e, E_EXEC)); - /* NOTREACHED */ -} - - -STATIC void -tryexec(char *cmd, char **argv, char **envp, int vforked) -{ - int e; -#ifndef BSD - char *p; -#endif - -#ifdef SYSV - do { - execve(cmd, argv, envp); - } while (errno == EINTR); -#else - execve(cmd, argv, envp); -#endif - e = errno; - if (e == ENOEXEC) { - if (vforked) { - /* We are currently vfork(2)ed, so raise an - * exception, and evalcommand will try again - * with a normal fork(2). - */ - exraise(EXSHELLPROC); - } - initshellproc(); - setinputfile(cmd, 0); - commandname = arg0 = savestr(argv[0]); -#if !defined(BSD) && !defined(__linux__) - pgetc(); pungetc(); /* fill up input buffer */ - p = parsenextc; - if (parsenleft > 2 && p[0] == '#' && p[1] == '!') { - argv[0] = cmd; - execinterp(argv, envp); - } -#endif - setparam(argv + 1); - exraise(EXSHELLPROC); - } - errno = e; -} - - -#if !defined(BSD) && !defined(__linux__) -/* - * Execute an interpreter introduced by "#!", for systems where this - * feature has not been built into the kernel. If the interpreter is - * the shell, return (effectively ignoring the "#!"). If the execution - * of the interpreter fails, exit. - * - * This code peeks inside the input buffer in order to avoid actually - * reading any input. It would benefit from a rewrite. - */ - -#define NEWARGS 5 - -STATIC void -execinterp(char **argv, char **envp) -{ - int n; - char *inp; - char *outp; - char c; - char *p; - char **ap; - char *newargs[NEWARGS]; - int i; - char **ap2; - char **new; - - n = parsenleft - 2; - inp = parsenextc + 2; - ap = newargs; - for (;;) { - while (--n >= 0 && (*inp == ' ' || *inp == '\t')) - inp++; - if (n < 0) - goto bad; - if ((c = *inp++) == '\n') - break; - if (ap == &newargs[NEWARGS]) -bad: error("Bad #! line"); - STARTSTACKSTR(outp); - do { - STPUTC(c, outp); - } while (--n >= 0 && (c = *inp++) != ' ' && c != '\t' && c != '\n'); - STPUTC('\0', outp); - n++, inp--; - *ap++ = grabstackstr(outp); - } - if (ap == newargs + 1) { /* if no args, maybe no exec is needed */ - p = newargs[0]; - for (;;) { - if (equal(p, "sh") || equal(p, "ash")) { - return; - } - while (*p != '/') { - if (*p == '\0') - goto break2; - p++; - } - p++; - } -break2:; - } - i = (char *)ap - (char *)newargs; /* size in bytes */ - if (i == 0) - error("Bad #! line"); - for (ap2 = argv ; *ap2++ != NULL ; ); - new = ckmalloc(i + ((char *)ap2 - (char *)argv)); - ap = newargs, ap2 = new; - while ((i -= sizeof (char **)) >= 0) - *ap2++ = *ap++; - ap = argv; - while (*ap2++ = *ap++); - shellexec(new, envp, pathval(), 0); - /* NOTREACHED */ -} -#endif - - - -/* - * Do a path search. The variable path (passed by reference) should be - * set to the start of the path before the first call; padvance will update - * this value as it proceeds. Successive calls to padvance will return - * the possible path expansions in sequence. If an option (indicated by - * a percent sign) appears in the path entry then the global variable - * pathopt will be set to point to it; otherwise pathopt will be set to - * NULL. - */ - -const char *pathopt; - -char * -padvance(const char **path, const char *name) -{ - const char *p; - char *q; - const char *start; - int len; - - if (*path == NULL) - return NULL; - start = *path; - for (p = start ; *p && *p != ':' && *p != '%' ; p++); - len = p - start + strlen(name) + 2; /* "2" is for '/' and '\0' */ - while (stackblocksize() < len) - growstackblock(); - q = stackblock(); - if (p != start) { - memcpy(q, start, p - start); - q += p - start; - *q++ = '/'; - } - strcpy(q, name); - pathopt = NULL; - if (*p == '%') { - pathopt = ++p; - while (*p && *p != ':') p++; - } - if (*p == ':') - *path = p + 1; - else - *path = NULL; - return stalloc(len); -} - - - -/*** Command hashing code ***/ - - -int -hashcmd(int argc, char **argv) -{ - struct tblentry **pp; - struct tblentry *cmdp; - int c; - int verbose; - struct cmdentry entry; - char *name; - - verbose = 0; - while ((c = nextopt("rv")) != '\0') { - if (c == 'r') { - clearcmdentry(0); - } else if (c == 'v') { - verbose++; - } - } - if (*argptr == NULL) { - for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) { - for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) { - if (verbose || cmdp->cmdtype == CMDNORMAL) - printentry(cmdp, verbose); - } - } - return 0; - } - while ((name = *argptr) != NULL) { - if ((cmdp = cmdlookup(name, 0)) != NULL - && (cmdp->cmdtype == CMDNORMAL - || (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0))) - delete_cmd_entry(); - find_command(name, &entry, DO_ERR, pathval()); - if (verbose) { - if (entry.cmdtype != CMDUNKNOWN) { /* if no error msg */ - cmdp = cmdlookup(name, 0); - printentry(cmdp, verbose); - } - flushall(); - } - argptr++; - } - return 0; -} - - -STATIC void -printentry(struct tblentry *cmdp, int verbose) -{ - int idx; - const char *path; - char *name; - - switch (cmdp->cmdtype) { - case CMDNORMAL: - idx = cmdp->param.index; - path = pathval(); - do { - name = padvance(&path, cmdp->cmdname); - stunalloc(name); - } while (--idx >= 0); - out1str(name); - break; - case CMDSPLBLTIN: - out1fmt("special builtin %s", cmdp->cmdname); - break; - case CMDBUILTIN: - out1fmt("builtin %s", cmdp->cmdname); - break; - case CMDFUNCTION: - out1fmt("function %s", cmdp->cmdname); - if (verbose) { - struct procstat ps; - INTOFF; - commandtext(&ps, cmdp->param.func); - INTON; - out1str("() { "); - out1str(ps.cmd); - out1str("; }"); - } - break; - default: - error("internal error: %s cmdtype %d", cmdp->cmdname, cmdp->cmdtype); - } - if (cmdp->rehash) - out1c('*'); - out1c('\n'); -} - - - -/* - * Resolve a command name. If you change this routine, you may have to - * change the shellexec routine as well. - */ - -void -find_command(char *name, struct cmdentry *entry, int act, const char *path) -{ - struct tblentry *cmdp, loc_cmd; - int idx; - int prev; - char *fullname; - struct stat statb; - int e; - int (*bltin)(int,char **); - - /* If name contains a slash, don't use PATH or hash table */ - if (strchr(name, '/') != NULL) { - if (act & DO_ABS) { - while (stat(name, &statb) < 0) { -#ifdef SYSV - if (errno == EINTR) - continue; -#endif - if (errno != ENOENT && errno != ENOTDIR) - e = errno; - entry->cmdtype = CMDUNKNOWN; - entry->u.index = -1; - return; - } - entry->cmdtype = CMDNORMAL; - entry->u.index = -1; - return; - } - entry->cmdtype = CMDNORMAL; - entry->u.index = 0; - return; - } - - if (path != pathval()) - act |= DO_ALTPATH; - - if (act & DO_ALTPATH && strstr(path, "%builtin") != NULL) - act |= DO_ALTBLTIN; - - /* If name is in the table, check answer will be ok */ - if ((cmdp = cmdlookup(name, 0)) != NULL) { - do { - switch (cmdp->cmdtype) { - case CMDNORMAL: - if (act & DO_ALTPATH) { - cmdp = NULL; - continue; - } - break; - case CMDFUNCTION: - if (act & DO_NOFUNC) { - cmdp = NULL; - continue; - } - break; - case CMDBUILTIN: - if ((act & DO_ALTBLTIN) || builtinloc >= 0) { - cmdp = NULL; - continue; - } - break; - } - /* if not invalidated by cd, we're done */ - if (cmdp->rehash == 0) - goto success; - } while (0); - } - - /* If %builtin not in path, check for builtin next */ - if ((act & DO_ALTPATH ? !(act & DO_ALTBLTIN) : builtinloc < 0) && - (bltin = find_builtin(name)) != 0) - goto builtin_success; - - /* We have to search path. */ - prev = -1; /* where to start */ - if (cmdp) { /* doing a rehash */ - if (cmdp->cmdtype == CMDBUILTIN) - prev = builtinloc; - else - prev = cmdp->param.index; - } - - e = ENOENT; - idx = -1; -loop: - while ((fullname = padvance(&path, name)) != NULL) { - stunalloc(fullname); - idx++; - if (pathopt) { - if (prefix("builtin", pathopt)) { - if ((bltin = find_builtin(name)) == 0) - goto loop; - goto builtin_success; - } else if (prefix("func", pathopt)) { - /* handled below */ - } else { - /* ignore unimplemented options */ - goto loop; - } - } - /* if rehash, don't redo absolute path names */ - if (fullname[0] == '/' && idx <= prev) { - if (idx < prev) - goto loop; - TRACE(("searchexec \"%s\": no change\n", name)); - goto success; - } - while (stat(fullname, &statb) < 0) { -#ifdef SYSV - if (errno == EINTR) - continue; -#endif - if (errno != ENOENT && errno != ENOTDIR) - e = errno; - goto loop; - } - e = EACCES; /* if we fail, this will be the error */ - if (!S_ISREG(statb.st_mode)) - goto loop; - if (pathopt) { /* this is a %func directory */ - if (act & DO_NOFUNC) - goto loop; - stalloc(strlen(fullname) + 1); - readcmdfile(fullname); - if ((cmdp = cmdlookup(name, 0)) == NULL || - cmdp->cmdtype != CMDFUNCTION) - error("%s not defined in %s", name, fullname); - stunalloc(fullname); - goto success; - } -#ifdef notdef - /* XXX this code stops root executing stuff, and is buggy - if you need a group from the group list. */ - if (statb.st_uid == geteuid()) { - if ((statb.st_mode & 0100) == 0) - goto loop; - } else if (statb.st_gid == getegid()) { - if ((statb.st_mode & 010) == 0) - goto loop; - } else { - if ((statb.st_mode & 01) == 0) - goto loop; - } -#endif - TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname)); - INTOFF; - if (act & DO_ALTPATH) { - stalloc(strlen(fullname) + 1); - cmdp = &loc_cmd; - } else - cmdp = cmdlookup(name, 1); - cmdp->cmdtype = CMDNORMAL; - cmdp->param.index = idx; - INTON; - goto success; - } - - /* We failed. If there was an entry for this command, delete it */ - if (cmdp) - delete_cmd_entry(); - if (act & DO_ERR) - outfmt(out2, "%s: %s\n", name, errmsg(e, E_EXEC)); - entry->cmdtype = CMDUNKNOWN; - return; - -builtin_success: - INTOFF; - if (act & DO_ALTPATH) - cmdp = &loc_cmd; - else - cmdp = cmdlookup(name, 1); - if (cmdp->cmdtype == CMDFUNCTION) - /* DO_NOFUNC must have been set */ - cmdp = &loc_cmd; - cmdp->cmdtype = CMDBUILTIN; - cmdp->param.bltin = bltin; - INTON; -success: - cmdp->rehash = 0; - entry->cmdtype = cmdp->cmdtype; - entry->u = cmdp->param; -} - - - -/* - * Search the table of builtin commands. - */ - -int -(*find_builtin(name))(int, char **) - char *name; -{ - const struct builtincmd *bp; - - for (bp = builtincmd ; bp->name ; bp++) { - if (*bp->name == *name && equal(bp->name, name)) - return bp->builtin; - } - return 0; -} - -int -(*find_splbltin(name))(int, char **) - char *name; -{ - const struct builtincmd *bp; - - for (bp = splbltincmd ; bp->name ; bp++) { - if (*bp->name == *name && equal(bp->name, name)) - return bp->builtin; - } - return 0; -} - -/* - * At shell startup put special builtins into hash table. - * ensures they are executed first (see posix). - * We stop functions being added with the same name - * (as they are impossible to call) - */ - -void -hash_special_builtins(void) -{ - const struct builtincmd *bp; - struct tblentry *cmdp; - - for (bp = splbltincmd ; bp->name ; bp++) { - cmdp = cmdlookup(bp->name, 1); - cmdp->cmdtype = CMDSPLBLTIN; - cmdp->param.bltin = bp->builtin; - } -} - - - -/* - * Called when a cd is done. Marks all commands so the next time they - * are executed they will be rehashed. - */ - -void -hashcd(void) -{ - struct tblentry **pp; - struct tblentry *cmdp; - - for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) { - for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) { - if (cmdp->cmdtype == CMDNORMAL - || (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0)) - cmdp->rehash = 1; - } - } -} - - - -/* - * Fix command hash table when PATH changed. - * Called before PATH is changed. The argument is the new value of PATH; - * pathval() still returns the old value at this point. - * Called with interrupts off. - */ - -void -changepath(const char *newval) -{ - const char *old, *new; - int idx; - int firstchange; - int bltin; - - old = pathval(); - new = newval; - firstchange = 9999; /* assume no change */ - idx = 0; - bltin = -1; - for (;;) { - if (*old != *new) { - firstchange = idx; - if ((*old == '\0' && *new == ':') - || (*old == ':' && *new == '\0')) - firstchange++; - old = new; /* ignore subsequent differences */ - } - if (*new == '\0') - break; - if (*new == '%' && bltin < 0 && prefix("builtin", new + 1)) - bltin = idx; - if (*new == ':') { - idx++; - } - new++, old++; - } - if (builtinloc < 0 && bltin >= 0) - builtinloc = bltin; /* zap builtins */ - if (builtinloc >= 0 && bltin < 0) - firstchange = 0; - clearcmdentry(firstchange); - builtinloc = bltin; -} - - -/* - * Clear out command entries. The argument specifies the first entry in - * PATH which has changed. - */ - -STATIC void -clearcmdentry(int firstchange) -{ - struct tblentry **tblp; - struct tblentry **pp; - struct tblentry *cmdp; - - INTOFF; - for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) { - pp = tblp; - while ((cmdp = *pp) != NULL) { - if ((cmdp->cmdtype == CMDNORMAL && - cmdp->param.index >= firstchange) - || (cmdp->cmdtype == CMDBUILTIN && - builtinloc >= firstchange)) { - *pp = cmdp->next; - ckfree(cmdp); - } else { - pp = &cmdp->next; - } - } - } - INTON; -} - - -/* - * Delete all functions. - */ - -#ifdef mkinit -MKINIT void deletefuncs(void); -MKINIT void hash_special_builtins(void); - -INIT { - hash_special_builtins(); -} - -SHELLPROC { - deletefuncs(); -} -#endif - -void -deletefuncs(void) -{ - struct tblentry **tblp; - struct tblentry **pp; - struct tblentry *cmdp; - - INTOFF; - for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) { - pp = tblp; - while ((cmdp = *pp) != NULL) { - if (cmdp->cmdtype == CMDFUNCTION) { - *pp = cmdp->next; - freefunc(cmdp->param.func); - ckfree(cmdp); - } else { - pp = &cmdp->next; - } - } - } - INTON; -} - - - -/* - * Locate a command in the command hash table. If "add" is nonzero, - * add the command to the table if it is not already present. The - * variable "lastcmdentry" is set to point to the address of the link - * pointing to the entry, so that delete_cmd_entry can delete the - * entry. - */ - -struct tblentry **lastcmdentry; - - -STATIC struct tblentry * -cmdlookup(const char *name, int add) -{ - int hashval; - const char *p; - struct tblentry *cmdp; - struct tblentry **pp; - - p = name; - hashval = *p << 4; - while (*p) - hashval += *p++; - hashval &= 0x7FFF; - pp = &cmdtable[hashval % CMDTABLESIZE]; - for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) { - if (equal(cmdp->cmdname, name)) - break; - pp = &cmdp->next; - } - if (add && cmdp == NULL) { - INTOFF; - cmdp = *pp = ckmalloc(sizeof (struct tblentry) - ARB - + strlen(name) + 1); - cmdp->next = NULL; - cmdp->cmdtype = CMDUNKNOWN; - cmdp->rehash = 0; - strcpy(cmdp->cmdname, name); - INTON; - } - lastcmdentry = pp; - return cmdp; -} - -/* - * Delete the command entry returned on the last lookup. - */ - -STATIC void -delete_cmd_entry(void) -{ - struct tblentry *cmdp; - - INTOFF; - cmdp = *lastcmdentry; - *lastcmdentry = cmdp->next; - ckfree(cmdp); - INTON; -} - - - -#ifdef notdef -void -getcmdentry(char *name, struct cmdentry *entry) -{ - struct tblentry *cmdp = cmdlookup(name, 0); - - if (cmdp) { - entry->u = cmdp->param; - entry->cmdtype = cmdp->cmdtype; - } else { - entry->cmdtype = CMDUNKNOWN; - entry->u.index = 0; - } -} -#endif - - -/* - * Add a new command entry, replacing any existing command entry for - * the same name - except special builtins. - */ - -STATIC void -addcmdentry(char *name, struct cmdentry *entry) -{ - struct tblentry *cmdp; - - INTOFF; - cmdp = cmdlookup(name, 1); - if (cmdp->cmdtype != CMDSPLBLTIN) { - if (cmdp->cmdtype == CMDFUNCTION) { - freefunc(cmdp->param.func); - } - cmdp->cmdtype = entry->cmdtype; - cmdp->param = entry->u; - } - INTON; -} - - -/* - * Define a shell function. - */ - -void -defun(char *name, union node *func) -{ - struct cmdentry entry; - - INTOFF; - entry.cmdtype = CMDFUNCTION; - entry.u.func = copyfunc(func); - addcmdentry(name, &entry); - INTON; -} - - -/* - * Delete a function if it exists. - */ - -int -unsetfunc(char *name) -{ - struct tblentry *cmdp; - - if ((cmdp = cmdlookup(name, 0)) != NULL && - cmdp->cmdtype == CMDFUNCTION) { - freefunc(cmdp->param.func); - delete_cmd_entry(); - return (0); - } - return (1); -} - -/* - * Locate and print what a word is... - * also used for 'command -[v|V]' - */ - -int -typecmd(int argc, char **argv) -{ - struct cmdentry entry; - struct tblentry *cmdp; - char * const *pp; - struct alias *ap; - int err = 0; - char *arg; - int c; - int V_flag = 0; - int v_flag = 0; - int p_flag = 0; - - while ((c = nextopt("vVp")) != 0) { - switch (c) { - case 'v': v_flag = 1; break; - case 'V': V_flag = 1; break; - case 'p': p_flag = 1; break; - } - } - - if (p_flag && (v_flag || V_flag)) - error("cannot specify -p with -v or -V"); - - while ((arg = *argptr++)) { - if (!v_flag) - out1str(arg); - /* First look at the keywords */ - for (pp = parsekwd; *pp; pp++) - if (**pp == *arg && equal(*pp, arg)) - break; - - if (*pp) { - if (v_flag) - err = 1; - else - out1str(" is a shell keyword\n"); - continue; - } - - /* Then look at the aliases */ - if ((ap = lookupalias(arg, 1)) != NULL) { - if (!v_flag) - out1fmt(" is an alias for \n"); - out1fmt("%s\n", ap->val); - continue; - } - - /* Then check if it is a tracked alias */ - if ((cmdp = cmdlookup(arg, 0)) != NULL) { - entry.cmdtype = cmdp->cmdtype; - entry.u = cmdp->param; - } else { - /* Finally use brute force */ - find_command(arg, &entry, DO_ABS, pathval()); - } - - switch (entry.cmdtype) { - case CMDNORMAL: { - if (strchr(arg, '/') == NULL) { - const char *path = pathval(); - char *name; - int j = entry.u.index; - do { - name = padvance(&path, arg); - stunalloc(name); - } while (--j >= 0); - if (!v_flag) - out1fmt(" is%s ", - cmdp ? " a tracked alias for" : ""); - out1fmt("%s\n", name); - } else { - if (access(arg, X_OK) == 0) { - if (!v_flag) - out1fmt(" is "); - out1fmt("%s\n", arg); - } else { - if (!v_flag) - out1fmt(": %s\n", - strerror(errno)); - else - err = 126; - } - } - break; - } - case CMDFUNCTION: - if (!v_flag) - out1str(" is a shell function\n"); - else - out1fmt("%s\n", arg); - break; - - case CMDBUILTIN: - if (!v_flag) - out1str(" is a shell builtin\n"); - else - out1fmt("%s\n", arg); - break; - - case CMDSPLBLTIN: - if (!v_flag) - out1str(" is a special shell builtin\n"); - else - out1fmt("%s\n", arg); - break; - - default: - if (!v_flag) - out1str(": not found\n"); - err = 127; - break; - } - } - return err; -} |