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Diffstat (limited to 'libc/pwd_grp/pwent.c')
-rw-r--r--libc/pwd_grp/pwent.c40
1 files changed, 26 insertions, 14 deletions
diff --git a/libc/pwd_grp/pwent.c b/libc/pwd_grp/pwent.c
index b2c149b35..e983a73a0 100644
--- a/libc/pwd_grp/pwent.c
+++ b/libc/pwd_grp/pwent.c
@@ -20,6 +20,13 @@
*
*/
+/*
+ * 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
+ * link them all in together.
+ */
+
+#define _GNU_SOURCE
#include <features.h>
#include <unistd.h>
#include <stdlib.h>
@@ -30,7 +37,7 @@
#ifdef __UCLIBC_HAS_THREADS__
#include <pthread.h>
-static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t mylock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
# define LOCK pthread_mutex_lock(&mylock)
# define UNLOCK pthread_mutex_unlock(&mylock);
#else
@@ -38,21 +45,14 @@ static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
# 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
- * link them all in together.
- */
-
/* file descriptor for the password file currently open */
-static int pw_fd = -1;
+static int pw_fd = -9;
void setpwent(void)
{
LOCK;
- if (pw_fd != -1)
+ if (pw_fd > -1)
close(pw_fd);
-
pw_fd = open(_PATH_PASSWD, O_RDONLY);
UNLOCK;
}
@@ -60,7 +60,7 @@ void setpwent(void)
void endpwent(void)
{
LOCK;
- if (pw_fd != -1)
+ if (pw_fd > -1)
close(pw_fd);
pw_fd = -1;
UNLOCK;
@@ -86,13 +86,25 @@ int getpwent_r (struct passwd *password, char *buff,
struct passwd *getpwent(void)
{
int ret;
- static char line_buff[PWD_BUFFER_SIZE];
- static struct passwd pwd;
struct passwd *result;
+ static struct passwd pwd;
+ static char line_buff[PWD_BUFFER_SIZE];
- if ((ret=getpwent_r(&pwd, line_buff, sizeof(line_buff), &result)) == 0) {
+ LOCK;
+ /* Open /etc/passwd if not yet opened */
+ if (pw_fd == -9) {
+ setpwent();
+ }
+ if (pw_fd == -1) {
+ UNLOCK;
+ return NULL;
+ }
+ ret=getpwent_r(&pwd, line_buff, sizeof(line_buff), &result);
+ if (ret == 0) {
+ UNLOCK;
return &pwd;
}
+ UNLOCK;
__set_errno(ret);
return NULL;
}