NetBSD/usr.bin/whereis/whereis.c

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/* $NetBSD: whereis.c,v 1.10 1999/11/09 15:06:37 drochner Exp $ */
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/*-
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* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
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*
* 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.
*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1993\n\
The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
#ifndef lint
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#if 0
static char sccsid[] = "@(#)whereis.c 8.3 (Berkeley) 5/4/95";
#endif
__RCSID("$NetBSD: whereis.c,v 1.10 1999/11/09 15:06:37 drochner Exp $");
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#endif /* not lint */
#include <sys/param.h>
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#include <sys/stat.h>
#include <sys/sysctl.h>
#include <err.h>
#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
#include <string.h>
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#include <unistd.h>
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void usage __P((void));
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int main __P((int, char *[]));
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int
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main(argc, argv)
int argc;
char *argv[];
{
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struct stat sb;
size_t len;
int ch, sverrno, mib[2];
char *p, *t, *std, path[MAXPATHLEN];
int useenvpath = 0;
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while ((ch = getopt(argc, argv, "p")) != -1)
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switch (ch) {
case 'p':
useenvpath = 1; /* use environment for PATH */
break;
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case '?':
default:
usage();
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}
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argc -= optind;
argv += optind;
if (argc == 0)
usage();
if (useenvpath) {
if ((std = getenv("PATH")) == NULL)
err(1, "getenv: PATH" );
} else {
/* Retrieve the standard path. */
mib[0] = CTL_USER;
mib[1] = USER_CS_PATH;
if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1)
return (-1);
if (len == 0)
err(1, "user_cs_path: sysctl: zero length\n");
if ((std = malloc(len)) == NULL)
err(1, NULL);
if (sysctl(mib, 2, std, &len, NULL, 0) == -1) {
sverrno = errno;
free(std);
errno = sverrno;
err(1, "sysctl: user_cs_path");
}
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}
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/* For each path, for each program... */
for (; *argv; ++argv)
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);
if (!stat(path, &sb))
(void)printf("%s\n", path);
if (p == NULL)
break;
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}
return (0);
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}
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void
usage()
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{
(void)fprintf(stderr, "usage: whereis [-p] program [...]\n");
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exit (1);
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}