diff options
Diffstat (limited to 'system_cmds/getconf.tproj/getconf.c')
| -rw-r--r-- | system_cmds/getconf.tproj/getconf.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/system_cmds/getconf.tproj/getconf.c b/system_cmds/getconf.tproj/getconf.c new file mode 100644 index 0000000..b2a2752 --- /dev/null +++ b/system_cmds/getconf.tproj/getconf.c @@ -0,0 +1,189 @@ +/* + * Copyright 2000 Massachusetts Institute of Technology + * + * Permission to use, copy, modify, and distribute this software and + * its documentation for any purpose and without fee is hereby + * granted, provided that both the above copyright notice and this + * permission notice appear in all copies, that both the above + * copyright notice and this permission notice appear in all + * supporting documentation, and that the name of M.I.T. not be used + * in advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. M.I.T. makes + * no representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied + * warranty. + * + * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS + * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT + * SHALL M.I.T. 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> +__FBSDID("$FreeBSD: src/usr.bin/getconf/getconf.c,v 1.10 2006/12/06 12:00:26 maxim Exp $"); + +#include <sys/types.h> + +#include <err.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <sysexits.h> +#include <unistd.h> + +#include "getconf.h" + +static void do_confstr(const char *name, int key); +static void do_sysconf(const char *name, int key); +static void do_pathconf(const char *name, int key, const char *path); + +static void +usage(void) +{ + fprintf(stderr, +"usage: getconf [-v prog_env] system_var\n" +" getconf [-v prog_env] path_var pathname\n"); + exit(EX_USAGE); +} + +int +main(int argc, char **argv) +{ + int c, key, valid; + const char *name, *vflag, *alt_path; + intmax_t limitval; + + vflag = NULL; + while ((c = getopt(argc, argv, "v:")) != -1) { + switch (c) { + case 'v': + vflag = optarg; + break; + + default: + usage(); + } + } + + if ((name = argv[optind]) == NULL) + usage(); + + if (vflag != NULL) { + if ((valid = find_progenv(vflag, &alt_path)) == 0) + errx(EX_USAGE, "invalid programming environment %s", + vflag); + if (valid > 0 && alt_path != NULL) { + if (argv[optind + 1] == NULL) + execl(alt_path, "getconf", argv[optind], + (char *)NULL); + else + execl(alt_path, "getconf", argv[optind], + argv[optind + 1], (char *)NULL); + + err(EX_OSERR, "execl: %s", alt_path); + } + if (valid < 0) + errx(EX_UNAVAILABLE, "environment %s is not available", + vflag); + } + + if (argv[optind + 1] == NULL) { /* confstr or sysconf */ + if ((valid = find_limit(name, &limitval)) != 0) { + if (valid > 0) + printf("%" PRIdMAX "\n", limitval); + else + printf("undefined\n"); + + return 0; + } + if ((valid = find_confstr(name, &key)) != 0) { + if (valid > 0) + do_confstr(name, key); + else + printf("undefined\n"); + } else { + valid = find_sysconf(name, &key); + if (valid > 0) { + do_sysconf(name, key); + } else if (valid < 0) { + printf("undefined\n"); + } else + errx(EX_USAGE, + "no such configuration parameter `%s'", + name); + } + } else { + valid = find_pathconf(name, &key); + if (valid != 0) { + if (valid > 0) + do_pathconf(name, key, argv[optind + 1]); + else + printf("undefined\n"); + } else + errx(EX_USAGE, + "no such path configuration parameter `%s'", + name); + } + return 0; +} + +static void +do_confstr(const char *name, int key) +{ + size_t len; + int savederr; + + savederr = errno; + errno = 0; + len = confstr(key, 0, 0); + if (len == 0) { + if (errno) + err(EX_OSERR, "confstr: %s", name); + else + printf("undefined\n"); + } else { + char buf[len + 1]; + + confstr(key, buf, len); + printf("%s\n", buf); + } + errno = savederr; +} + +static void +do_sysconf(const char *name, int key) +{ + long value; + + errno = 0; + value = sysconf(key); + if (value == -1 && errno != 0) + err(EX_OSERR, "sysconf: %s", name); + else if (value == -1) + printf("undefined\n"); + else + printf("%ld\n", value); +} + +static void +do_pathconf(const char *name, int key, const char *path) +{ + long value; + + errno = 0; + value = pathconf(path, key); + if (value == -1 && errno != 0) + err(EX_OSERR, "pathconf: %s", name); + else if (value == -1) + printf("undefined\n"); + else + printf("%ld\n", value); +} |