diff options
Diffstat (limited to 'libc/pwd_grp/grent.c')
| -rw-r--r-- | libc/pwd_grp/grent.c | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/libc/pwd_grp/grent.c b/libc/pwd_grp/grent.c index 42db9f9b6..f867a1aaf 100644 --- a/libc/pwd_grp/grent.c +++ b/libc/pwd_grp/grent.c @@ -24,30 +24,47 @@ * in together. */ +#include <features.h> #include <unistd.h> #include <fcntl.h> #include <paths.h> #include "config.h" +#ifdef __UCLIBC_HAS_THREADS__ +#include <pthread.h> +static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER; +# define LOCK pthread_mutex_lock(&mylock) +# define UNLOCK pthread_mutex_unlock(&mylock); +#else +# define LOCK +# define UNLOCK +#endif + static int grp_fd = -1; void setgrent(void) { - if (grp_fd != -1) - close(grp_fd); - grp_fd = open(_PATH_GROUP, O_RDONLY); + LOCK; + if (grp_fd != -1) + close(grp_fd); + grp_fd = open(_PATH_GROUP, O_RDONLY); + UNLOCK; } void endgrent(void) { - if (grp_fd != -1) - close(grp_fd); - grp_fd = -1; + LOCK; + if (grp_fd != -1) + close(grp_fd); + grp_fd = -1; + UNLOCK; } struct group *getgrent(void) { - if (grp_fd == -1) - return NULL; - return __getgrent(grp_fd); + LOCK; + if (grp_fd == -1) + return NULL; + return __getgrent(grp_fd); + UNLOCK; } |