diff options
Diffstat (limited to 'libc/pwd_grp/pwent.c')
| -rw-r--r-- | libc/pwd_grp/pwent.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/libc/pwd_grp/pwent.c b/libc/pwd_grp/pwent.c index 55fd249bc..1bc129bf6 100644 --- a/libc/pwd_grp/pwent.c +++ b/libc/pwd_grp/pwent.c @@ -18,6 +18,7 @@ * */ +#include <features.h> #include <unistd.h> #include <stdlib.h> #include <errno.h> @@ -25,6 +26,16 @@ #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 + /* * setpwent(), endpwent(), and getpwent() are included in the same object * file, since one cannot be used without the other two, so it makes sense to @@ -36,25 +47,32 @@ static int pw_fd = -1; void setpwent(void) { + LOCK; if (pw_fd != -1) close(pw_fd); pw_fd = open(_PATH_PASSWD, O_RDONLY); + UNLOCK; } void endpwent(void) { + LOCK; if (pw_fd != -1) close(pw_fd); pw_fd = -1; + UNLOCK; } int getpwent_r (struct passwd *password, char *buff, size_t buflen, struct passwd **crap) { + LOCK; if (pw_fd != -1 && __getpwent_r(password, buff, buflen, pw_fd) != -1) { + UNLOCK; return 0; } + UNLOCK; return -1; } @@ -62,9 +80,12 @@ struct passwd *getpwent(void) { static char line_buff[PWD_BUFFER_SIZE]; static struct passwd pwd; + LOCK; if (getpwent_r(&pwd, line_buff, sizeof(line_buff), NULL) != -1) { + UNLOCK; return &pwd; } + UNLOCK; return NULL; } |