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Modifications to flock.c #249

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Merged
merged 1 commit into from
Feb 11, 2025
Merged

Modifications to flock.c #249

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13 changes: 9 additions & 4 deletions library/fcntl/flock.c
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Original file line number Diff line number Diff line change
Expand Up @@ -10,25 +10,30 @@
#include "stdlib_memory.h"
#endif /* _STDLIB_MEMORY_H */

#include <stdio.h>

int
flock(int fd, int op) {
int ret = -1;
struct flock lock;

if (op != LOCK_SH && op != LOCK_EX && op != LOCK_UN && op != LOCK_NB) {
if (op != LOCK_SH
&& op != LOCK_EX
&& op != LOCK_UN
&& op != (LOCK_SH|LOCK_NB)
&& op != (LOCK_EX|LOCK_NB)) {
__set_errno(EINVAL);
goto out;
}

/* Initialize the flock structure. */
memset(&lock, 0, sizeof(lock));

if (op == LOCK_SH) {
if (op & LOCK_SH) {
lock.l_type = F_RDLCK;
/* Place a shared (read) lock on the file. */
ret = fcntl(fd, F_SETLK, &lock);
}
else if (op == LOCK_EX) {
else if (op & LOCK_EX) {
lock.l_type = F_WRLCK;
/* Place an exclusive (write) lock on the file. */
ret = fcntl(fd, F_SETLK, &lock);
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