- 101 名前：デフォルトの名無しさん mailto:sage [2008/06/10(火) 05:43:56 ]
- >>21
#include <sys/types.h>
#include <sys/wait.h>
#include <stdio.h>
#include <unistd.h>
int main(void) { pid_t c[2], p; int s;
switch (c[0] = fork()) { case -1: perror("fork"); break;
case 0: execlp("./fork1", "fork1", NULL); perror("fork1"); _exit(1); /* NOTREACHED */
default: break; }
switch (c[1] = fork()) { case -1: perror("fork"); break;
case 0: execlp("./fork2", "fork2", NULL); perror("fork2"); _exit(1); /* NOTREACHED */
default: break; }
while (c[0] != -1 || c[1] != -1) { int i;
if ((p=wait(&s)) == -1) { perror("wait"); break; }
else for (i = 0; i < 2; i++) if (p==c[i]) {
if (WIFEXITED(s)) printf("fork%c exit(%d)\n", i+1, WEXITSTATUS(s));
else if(WIFSIGNALED(s)) printf("fork%c killed(%d)\n", i+1, WTERMSIG(s));
c[i]=-1;break; }
if (i==2) {fprintf(stderr, "?\n"); break;}}
return 0; }
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