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aebd88ef8d
When displaying usage output in response to the user requesting it (e.g. using -h/--help), make sure we write the output to stdout and we exit(0). When displaying output in response to an error (e.g. an invalid option or argument), make sure we write the output to stdout and exit non-zero. This brings us in line with standard utilities out there. URL: https://bugs.gentoo.org/655942 Signed-off-by: Mike Frysinger <vapier@gentoo.org>
149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
/*
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plipconfig.c: plip-ifconfig program for the Linux PLIP device driver
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Copyright (c) 1994 John Paul Morrison (VE7JPM).
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version 0.2
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Changed by Alan Cox, to reflect the way SIOCDEVPRIVATE is meant to work
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and for the extra parameter added by Niibe.
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plipconfig is a quick hack to set PLIP parameters by using driver
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ioctls. plipconfig will no doubt be revised many times as the Linux
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PLIP driver and Linux 1.1 mutates.
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*/
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/*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2, as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 675 Mass Ave, Cambridge MA 02139, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <net/if.h>
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#include <linux/if_plip.h>
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#include "config.h"
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#include "intl.h"
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#include "net-support.h"
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#include "version.h"
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#include "util.h"
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int skfd = -1;
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struct ifreq ifr;
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struct plipconf *plip;
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static char *Release = RELEASE, *Signature = "John Paul Morrison, Alan Cox et al.";
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static void version(void)
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{
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printf("%s\n%s\n", Release, Signature);
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exit(E_VERSION);
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}
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static void usage(int rc)
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{
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FILE *fp = rc ? stderr : stdout;
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fprintf(fp, _("Usage: plipconfig interface [nibble NN] [trigger NN]\n"));
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fprintf(fp, _(" plipconfig -V | --version\n"));
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fprintf(fp, _(" plipconfig -h | --help\n"));
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exit(rc);
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}
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void print_plip(void)
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{
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printf(_("%s\tnibble %lu trigger %lu\n"), ifr.ifr_name, plip->nibble, plip->trigger);
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}
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int main(int argc, char **argv)
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{
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int ret = 0;
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char **spp;
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#if I18N
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setlocale (LC_ALL, "");
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bindtextdomain("net-tools", "/usr/share/locale");
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textdomain("net-tools");
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#endif
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if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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perror("socket");
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exit(-1);
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}
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/* Find any options. */
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argc--;
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argv++;
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while (argv[0] && *argv[0] == '-') {
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if (!strcmp(*argv, "-V") || !strcmp(*argv, "--version"))
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version();
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else if (!strcmp(*argv, "-h") || !strcmp(*argv, "--help"))
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usage(E_USAGE);
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else
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usage(E_OPTERR);
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argv++;
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argc--;
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}
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if (argc == 0)
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usage(E_OPTERR);
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spp = argv;
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safe_strncpy(ifr.ifr_name, *spp++, IFNAMSIZ);
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plip=(struct plipconf *)&ifr.ifr_data;
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plip->pcmd = PLIP_GET_TIMEOUT; /* get current settings for device */
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if (ioctl(skfd, SIOCDEVPLIP, &ifr) < 0) {
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perror("ioctl");
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exit(-1);
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}
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if (*spp == (char *) NULL) {
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print_plip();
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(void) close(skfd);
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exit(0);
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}
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while (*spp != (char *) NULL) {
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if (!strcmp(*spp, "nibble")) {
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if (*++spp == NULL)
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usage(E_OPTERR);
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plip->nibble = atoi(*spp);
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spp++;
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continue;
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}
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if (!strcmp(*spp, "trigger")) {
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if (*++spp == NULL)
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usage(E_OPTERR);
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plip->trigger = atoi(*spp);
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spp++;
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continue;
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}
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usage(E_OPTERR);
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}
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plip->pcmd = PLIP_SET_TIMEOUT;
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if (ioctl(skfd, SIOCDEVPLIP, &ifr) < 0)
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perror("ioctl");
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print_plip();
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/* Close the socket. */
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(void) close(skfd);
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return (ret);
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}
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