/*-
* Copyright (c) 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. 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
__COPYRIGHT("@(#) Copyright (c) 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
int
main(int argc, char *argv[])
{
struct stat sb;
size_t len;
int ch, mib[2];
char *p, *std, path[MAXPATHLEN];
const char *t;
int which = strcmp(getprogname(), "which") == 0;
int useenvpath = which, found = 0;
gid_t egid = getegid();
uid_t euid = geteuid();
/* To make access(2) do what we want */
if (setregid(egid, egid) == -1)
err(1, "Can't set gid to %lu", (unsigned long)egid);
if (setreuid(euid, euid) == -1)
err(1, "Can't set uid to %lu", (unsigned long)euid);
while ((ch = getopt(argc, argv, "ap")) != -1)
switch (ch) {
case 'a':
which = 0;
break;
case 'p':
useenvpath = 1; /* use environment for PATH */
break;
if (useenvpath) {
if ((std = getenv("PATH")) == NULL)
errx(1, "PATH environment variable is not set");
} else {
/* Retrieve the standard path. */
mib[0] = CTL_USER;
mib[1] = USER_CS_PATH;
if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1)
err(1, "sysctl: user.cs_path");
if (len == 0)
errx(1, "sysctl: user.cs_path (zero length)");
if ((std = malloc(len)) == NULL)
err(1, NULL);
if (sysctl(mib, 2, std, &len, NULL, 0) == -1)
err(1, "sysctl: user.cs_path");
}
/* For each path, for each program... */
for (; *argv; ++argv) {
if (**argv == '/') {
if (stat(*argv, &sb) == -1)
continue; /* next argv */
if (!S_ISREG(sb.st_mode))
continue; /* next argv */
if (access(*argv, X_OK) == -1)
continue; /* next argv */
(void)printf("%s\n", *argv);
found++;
if (which)
continue; /* next argv */
} else for (p = std; p; ) {
t = p;
if ((p = strchr(p, ':')) != NULL) {
*p = '\0';
if (t == p)
t = ".";
} else
if (strlen(t) == 0)
t = ".";
(void)snprintf(path, sizeof(path), "%s/%s", t, *argv);
len = snprintf(path, sizeof(path), "%s/%s", t, *argv);
if (p)
*p++ = ':';
if (len >= sizeof(path))
continue; /* next p */
if (stat(path, &sb) == -1)
continue; /* next p */
if (!S_ISREG(sb.st_mode))
continue; /* next p */
if (access(path, X_OK) == -1)
continue; /* next p */
(void)printf("%s\n", path);
found++;
if (which)
break; /* next argv */
}
}
