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lvm2/test/not.c
Petr Rockai bf180e98f4 A C implementation of "not" that handles fatal signals rather more
intelligently than the shell implementation. C code by Jaroslav Stava.

I have done a rudimentary review and checked that tests still pass.
2009-01-12 18:45:44 +00:00

37 lines
701 B
C

#include <unistd.h>
#include <stdio.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/wait.h>
int main(int args, char **argv) {
pid_t pid;
int status;
int FAILURE = 6;
if (args < 2) {
fprintf(stderr, "Need args\n");
return FAILURE;
}
pid = fork();
if (pid == -1) {
fprintf(stderr, "Could not fork\n");
return FAILURE;
} else if (pid == 0) { /* child */
execvp(argv[1], &argv[1]);
/* should not be accessible */
return FAILURE;
} else { /* parent */
waitpid(pid, &status, 0);
if (!WIFEXITED(status)) {
/* did not exit correctly */
return FAILURE;
}
/* return the opposite */
return !WEXITSTATUS(status);
}
/* not accessible */
return FAILURE;
}