55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
#define _GNU_SOURCE
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#include <stdio.h>
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#include <signal.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <sched.h>
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#include <time.h>
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#define STKS (4*4096)
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#ifndef CLONE_NEWPID
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#define CLONE_NEWPID 0x20000000
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#endif
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int main(int argc, char **argv)
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{
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//int pid;
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//void *stk;
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int fd, i = 0;
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char log_file[] = "/var/log/piggie.log";
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time_t t;
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struct tm *timeinfo;
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//stk = mmap(NULL, STKS, PROT_READ | PROT_WRITE,
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//MAP_PRIVATE | MAP_ANON | MAP_GROWSDOWN, 0, 0);
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//pid = clone(do_test, stk + STKS, SIGCHLD | CLONE_NEWPID, argv[1]);
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//printf("Child forked, pid %d\n", pid);
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fd = open("/dev/null", O_RDONLY);
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if (fd != 0) {
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dup2(fd, 0);
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close(fd);
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}
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if(NULL != argv[1])
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fd = open(argv[1], O_WRONLY | O_TRUNC | O_CREAT, 0600);
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else
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fd = open(log_file, O_WRONLY | O_TRUNC | O_CREAT, 0600);
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dup2(fd, 1);
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dup2(fd, 2);
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if (fd != 1 && fd != 2)
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close(fd);
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while (1) {
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sleep(1);
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time(&t);
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timeinfo = localtime(&t);
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printf("%d %s\n", i++, asctime(timeinfo));
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fflush(stdout);
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}
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return 0;
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} |