112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
/*
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* test_procps -- program to create a process to test procps
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*
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* Copyright 2015 Craig Small <csmall@enc.com.au>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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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
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <signal.h>
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#ifdef __linux__
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#include <sys/prctl.h>
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#endif
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#include "c.h"
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#define DEFAULT_SLEEPTIME 300
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#define MY_NAME "spcorp"
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static void usage(void)
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{
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fprintf(stderr, " %s [options]\n", program_invocation_short_name);
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fprintf(stderr, " -s <seconds>\n");
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exit(EXIT_FAILURE);
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}
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void
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signal_handler(int signum, siginfo_t *siginfo, void *ucontext)
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{
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char *signame = NULL;
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switch(signum) {
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case SIGUSR1:
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signame = strdup("SIGUSR1");
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break;
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case SIGUSR2:
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signame = strdup("SIGUSR2");
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break;
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default:
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printf("SIG unknown\n");
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exit(EXIT_FAILURE);
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}
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if (signame == NULL) {
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printf("SIG malloc error\n");
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exit(EXIT_FAILURE);
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}
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switch (siginfo->si_code) {
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case SI_USER:
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printf("SIG %s\n", signame);
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break;
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case SI_QUEUE:
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printf("SIG %s value=%d\n", signame, siginfo->si_int);
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break;
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default:
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printf("Unknown si_code %d\n", siginfo->si_code);
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exit(EXIT_FAILURE);
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}
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free(signame);
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}
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int main(int argc, char *argv[])
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{
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int sleep_time, opt;
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struct sigaction signal_action;
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sleep_time = DEFAULT_SLEEPTIME;
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while ((opt = getopt(argc, argv, "s:")) != -1) {
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switch(opt) {
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case 's':
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sleep_time = atoi(optarg);
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if (sleep_time < 1) {
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fprintf(stderr, "sleep time must be 1 second or more\n");
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usage();
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}
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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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/* Setup signal handling */
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signal_action.sa_sigaction = signal_handler;
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sigemptyset (&signal_action.sa_mask);
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signal_action.sa_flags = SA_SIGINFO;
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sigaction(SIGUSR1, &signal_action, NULL);
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sigaction(SIGUSR2, &signal_action, NULL);
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#ifdef __linux__
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/* set process name */
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prctl(PR_SET_NAME, MY_NAME, NULL, NULL, NULL);
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#endif
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while (sleep_time > 0) {
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sleep_time = sleep(sleep_time);
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}
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return EXIT_SUCCESS;
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}
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