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authorEric Andersen <andersen@codepoet.org>2003-10-10 07:34:27 +0000
committerEric Andersen <andersen@codepoet.org>2003-10-10 07:34:27 +0000
commit56104838733c81ba410ac41f767ac72267049489 (patch)
tree54057d78cdae893235b86787a735629396d857a5 /libc/pwd_grp/fgetgrent.c
parent61011662018fa98c4610c1ae826e417678cd5c80 (diff)
Implement getgrgid_r and getgrnam_r. Rework group handling code to be fully
reentrant, since there was still a shared static value. indent stuff,
Diffstat (limited to 'libc/pwd_grp/fgetgrent.c')
-rw-r--r--libc/pwd_grp/fgetgrent.c51
1 files changed, 37 insertions, 14 deletions
diff --git a/libc/pwd_grp/fgetgrent.c b/libc/pwd_grp/fgetgrent.c
index 2c7917601..d1a6514bd 100644
--- a/libc/pwd_grp/fgetgrent.c
+++ b/libc/pwd_grp/fgetgrent.c
@@ -1,6 +1,8 @@
+/* vi: set sw=4 ts=4: */
/*
* fgetgrent.c - This file is part of the libc-8086/grp package for ELKS,
* Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>.
+ * Copyright (C) 2001-2003 Erik Andersen <andersee@debian.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
@@ -24,28 +26,49 @@
#ifdef __UCLIBC_HAS_THREADS__
#include <pthread.h>
-extern pthread_mutex_t __getgrent_lock;
-# define LOCK pthread_mutex_lock(&__getgrent_lock)
-# define UNLOCK pthread_mutex_unlock(&__getgrent_lock);
+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 char *line_buff = NULL;
-static char **members = NULL;
+
+int fgetgrent_r (FILE *__restrict file, struct group *__restrict grp,
+ char *__restrict buff, size_t buflen,
+ struct group **__restrict result)
+{
+ int ret;
+ if (file == NULL) {
+ return EINTR;
+ }
+ *result = NULL;
+ flockfile(file);
+ ret = __getgrent_r(grp, buff, buflen, fileno(file));
+ funlockfile(file);
+ if (ret == 0) {
+ *result = grp;
+ return 0;
+ }
+ __set_errno(ret);
+ return ret;
+}
struct group *fgetgrent(FILE * file)
{
- struct group *grp;
+ int ret;
+ struct group *result;
+ static struct group grp;
+ static char line_buff[PWD_BUFFER_SIZE];
- if (file == NULL) {
- __set_errno(EINTR);
+ LOCK;
+ ret=fgetgrent_r(file, &grp, line_buff, sizeof(line_buff), &result);
+ if (ret == 0) {
+ UNLOCK;
+ return result;
+ }
+ UNLOCK;
+ __set_errno(ret);
return NULL;
- }
-
- LOCK;
- grp = __getgrent(fileno(file), line_buff, members);
- UNLOCK;
- return grp;
}