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1 #include <sys/sem.h> | 1 #include <sys/sem.h> |
2 #include <limits.h> | 2 #include <limits.h> |
3 #include <errno.h> | 3 #include <errno.h> |
4 #include "syscall.h" | 4 #include "syscall.h" |
5 #include "ipc.h" | 5 #include "ipc.h" |
6 | 6 |
7 int semget(key_t key, int n, int fl) | 7 int semget(key_t key, int n, int fl) { |
8 { | 8 /* The kernel uses the wrong type for the sem_nsems member |
9 » /* The kernel uses the wrong type for the sem_nsems member | 9 * of struct semid_ds, and thus might not check that the |
10 » * of struct semid_ds, and thus might not check that the | 10 * n fits in the correct (per POSIX) userspace type, so |
11 » * n fits in the correct (per POSIX) userspace type, so | 11 * we have to check here. */ |
12 » * we have to check here. */ | 12 if (n > USHRT_MAX) |
13 » if (n > USHRT_MAX) return __syscall_ret(-EINVAL); | 13 return __syscall_ret(-EINVAL); |
14 #ifdef SYS_semget | 14 #ifdef SYS_semget |
15 » return syscall(SYS_semget, key, n, fl); | 15 return syscall(SYS_semget, key, n, fl); |
16 #else | 16 #else |
17 » return syscall(SYS_ipc, IPCOP_semget, key, n, fl); | 17 return syscall(SYS_ipc, IPCOP_semget, key, n, fl); |
18 #endif | 18 #endif |
19 } | 19 } |
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