76 lines
1.4 KiB
C
76 lines
1.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <string.h>
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#include <stdbool.h>
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bool daemonize()
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{
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pid_t pid = fork();
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if (pid < 0)
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{
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return false;
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}
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if (pid > 0)
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{
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exit(0);
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}
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if (setsid() < 0)
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{
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return false;
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}
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pid = fork();
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if (pid < 0)
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{
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return false;
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}
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if (pid > 0)
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{
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exit(0);
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}
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umask(0);
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chdir("/");
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FILE *fp;
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fp = fopen("/Users/mdy/Development/langage_C/System2/daemonize/test.txt", "w");
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close(STDIN_FILENO);
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close(STDOUT_FILENO);
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dup(fileno(fp));
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close(STDERR_FILENO);
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dup(fileno(fp));
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return true;
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}
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void handler(int signum)
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{
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if (signum == SIGUSR1)
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{
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FILE *fp;
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fp = fopen("/Users/mdy/Development/langage_C/System2/daemonize/coucou.txt", "w");
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fprintf(fp, "coucou, je suis bien en vie!\n");
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fclose(fp);
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}
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else if (signum == SIGUSR2)
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{
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exit(EXIT_SUCCESS);
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}
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else
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{
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printf("received signal %d\n", signum);
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}
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}
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int main(void)
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{
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daemonize();
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if (signal(SIGUSR1, handler) == SIG_ERR)
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printf("can't catch SIGUSR1\n");
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if (signal(SIGUSR2, handler) == SIG_ERR)
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printf("can't catch SIGUSR2\n");
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for (;;)
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pause();
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}
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