168 lines
4.0 KiB
C
168 lines
4.0 KiB
C
/*
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* Copyright 2000 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include "getconf.h"
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static void do_confstr(const char *name, int key);
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static void do_sysconf(const char *name, int key);
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static void do_pathconf(const char *name, int key, const char *path);
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static void
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usage(void)
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{
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fprintf(stderr, "usage:\n"
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"\tgetconf [-v prog_model] system_var\n"
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"\tgetconf [-v prog_model] path_var pathname\n");
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exit(EX_USAGE);
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}
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int
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main(int argc, char **argv)
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{
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int c;
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const char *name, *vflag;
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int key;
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vflag = 0;
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while ((c = getopt(argc, argv, "v:")) != -1) {
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switch (c) {
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case 'v':
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vflag = optarg;
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break;
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default:
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usage();
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}
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}
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if (vflag)
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warnx("-v %s ignored", vflag);
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/* No arguments... */
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if ((name = argv[optind]) == 0)
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usage();
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if (argv[optind + 1] == 0) { /* confstr or sysconf */
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key = find_confstr(name);
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if (key >= 0) {
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do_confstr(name, key);
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} else {
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key = find_sysconf(name);
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if (key >= 0)
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do_sysconf(name, key);
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else
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errx(EX_USAGE,
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"no such configuration parameter `%s'",
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name);
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}
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} else {
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key = find_pathconf(name);
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if (key >= 0)
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do_pathconf(name, key, argv[optind + 1]);
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else
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errx(EX_USAGE,
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"no such path configuration parameter `%s'",
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name);
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}
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return 0;
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}
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static void
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do_confstr(const char *name, int key)
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{
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char *buf;
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size_t len;
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len = confstr(key, 0, 0);
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if (len < 0)
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err(EX_OSERR, "confstr: %s", name);
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if (len == 0) {
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printf("undefined\n");
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} else {
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buf = alloca(len);
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confstr(key, buf, len);
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printf("%s\n", buf);
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}
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}
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static void
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do_sysconf(const char *name, int key)
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{
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long value;
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errno = 0;
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value = sysconf(key);
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if (value == -1 && errno != 0)
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err(EX_OSERR, "sysconf: %s", name);
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else if (value == -1)
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printf("undefined\n");
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else
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/*
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* SUSv2 specifies that the value, if defined, is to be
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* printed using the format "%d\n". This is clearly
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* erroneous, since sysconf is defined to return a long
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* and not an int.
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*/
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printf("%ld\n", value);
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}
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static void
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do_pathconf(const char *name, int key, const char *path)
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{
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long value;
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errno = 0;
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value = pathconf(path, key);
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if (value == -1 && errno != 0)
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err(EX_OSERR, "pathconf: %s", name);
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else if (value == -1)
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printf("undefined\n");
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else
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/*
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* SUSv2 specifies that the value, if defined, is to be
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* printed using the format "%d\n". This is clearly
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* erroneous, since sysconf is defined to return a long
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* and not an int.
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*/
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printf("%ld\n", value);
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}
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