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/* COVERAGE: flock */
#include <stdio.h>
#include <sys/file.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
int fd;
char filename[100];
int main() {
sprintf(filename, "flock-tst.%d", getpid());
fd = creat(filename, 0644);
if (fd < 0) {
printf("ERROR");
return 1;
}
// --- test normal operation ---
flock(fd, LOCK_SH);
//staptest// flock (NNNN, LOCK_SH) = 0
flock(fd, LOCK_UN);
//staptest// flock (NNNN, LOCK_UN) = 0
flock(fd, LOCK_EX);
//staptest// flock (NNNN, LOCK_EX) = 0
flock(fd, LOCK_UN);
//staptest// flock (NNNN, LOCK_UN) = 0
// --- now try nasty things ---
flock(-1, LOCK_SH);
//staptest// flock (-1, LOCK_SH) = NNNN (EBADF)
flock(fd, -1);
//staptest// flock (NNNN, LOCK_[^ ]+|XXXX) = NNNN
// The above should do LOCK_SH in fact.
// So let's go ahead and call LOCK_UN at the end:
flock(fd, LOCK_UN);
close(fd);
unlink(filename);
}
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