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authorAustin Foxley <austinf@cetoncorp.com>2010-04-06 15:58:29 (GMT)
committerAustin Foxley <austinf@cetoncorp.com>2010-04-06 15:58:33 (GMT)
commitf10d127d36ada5b202cdea521e61b05522beb192 (patch)
tree44ae75bf0745de49fb46616afd4cf577cf7a258a /libc/misc/utmp/utent.c
parentc3af26045aa44286482fbfe93097f24b48cfb6a3 (diff)
parent384a55ef9f3387ed33eadab3eefe5057b4daeadb (diff)
Merge commit 'origin/master' into nptl
Conflicts: libc/misc/utmp/utent.c libc/sysdeps/linux/i386/bits/syscalls.h Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
Diffstat (limited to 'libc/misc/utmp/utent.c')
-rw-r--r--libc/misc/utmp/utent.c91
1 files changed, 51 insertions, 40 deletions
diff --git a/libc/misc/utmp/utent.c b/libc/misc/utmp/utent.c
index a3f01b6..a678130 100644
--- a/libc/misc/utmp/utent.c
+++ b/libc/misc/utmp/utent.c
@@ -25,14 +25,26 @@
__UCLIBC_MUTEX_STATIC(utmplock, PTHREAD_MUTEX_INITIALIZER);
+/* Do not create extra unlocked functions if no locking is needed */
+#if defined __UCLIBC_HAS_THREADS__
+# define static_if_threaded static
+#else
+# define static_if_threaded /* nothing */
+# define __setutent setutent
+# define __getutent getutent
+# define __getutid getutid
+#endif
+
+
/* Some global crap */
static int static_fd = -1;
static struct utmp static_utmp;
static const char default_file_name[] = _PATH_UTMP;
static const char *static_ut_name = default_file_name;
+
/* This function must be called with the LOCK held */
-static void __setutent(void)
+static_if_threaded void __setutent(void)
{
if (static_fd < 0) {
static_fd = open_not_cancel_2(static_ut_name, O_RDWR | O_CLOEXEC);
@@ -50,20 +62,19 @@ static void __setutent(void)
}
lseek(static_fd, 0, SEEK_SET);
}
-
+#if defined __UCLIBC_HAS_THREADS__
void setutent(void)
{
__UCLIBC_MUTEX_LOCK(utmplock);
__setutent();
__UCLIBC_MUTEX_UNLOCK(utmplock);
}
+#endif
libc_hidden_def(setutent)
/* This function must be called with the LOCK held */
-static struct utmp *__getutent(void)
+static_if_threaded struct utmp *__getutent(void)
{
- struct utmp *ret = NULL;
-
if (static_fd < 0) {
__setutent();
if (static_fd < 0) {
@@ -72,11 +83,22 @@ static struct utmp *__getutent(void)
}
if (read_not_cancel(static_fd, &static_utmp, sizeof(static_utmp)) == sizeof(static_utmp)) {
- ret = &static_utmp;
+ return &static_utmp;
}
+ return NULL;
+}
+#if defined __UCLIBC_HAS_THREADS__
+struct utmp *getutent(void)
+{
+ struct utmp *ret;
+
+ __UCLIBC_MUTEX_LOCK(utmplock);
+ ret = __getutent();
+ __UCLIBC_MUTEX_UNLOCK(utmplock);
return ret;
}
+#endif
void endutent(void)
{
@@ -87,63 +109,52 @@ void endutent(void)
__UCLIBC_MUTEX_UNLOCK(utmplock);
}
-struct utmp *getutent(void)
-{
- struct utmp *ret = NULL;
-
- __UCLIBC_MUTEX_LOCK(utmplock);
- ret = __getutent();
- __UCLIBC_MUTEX_UNLOCK(utmplock);
- return ret;
-}
-
/* This function must be called with the LOCK held */
-static struct utmp *__getutid(const struct utmp *utmp_entry)
+static_if_threaded struct utmp *__getutid(const struct utmp *utmp_entry)
{
struct utmp *lutmp;
+ unsigned type;
+
+ /* We use the fact that constants we are interested in are: */
+ /* RUN_LVL=1, ... OLD_TIME=4; INIT_PROCESS=5, ... USER_PROCESS=8 */
+ type = utmp_entry->ut_type - 1;
+ type /= 4;
while ((lutmp = __getutent()) != NULL) {
- if ( (utmp_entry->ut_type == RUN_LVL ||
- utmp_entry->ut_type == BOOT_TIME ||
- utmp_entry->ut_type == NEW_TIME ||
- utmp_entry->ut_type == OLD_TIME) &&
- lutmp->ut_type == utmp_entry->ut_type)
- {
- return lutmp;
- }
- if ( (utmp_entry->ut_type == INIT_PROCESS ||
- utmp_entry->ut_type == DEAD_PROCESS ||
- utmp_entry->ut_type == LOGIN_PROCESS ||
- utmp_entry->ut_type == USER_PROCESS) &&
- !strncmp(lutmp->ut_id, utmp_entry->ut_id, sizeof(lutmp->ut_id)))
- {
- return lutmp;
- }
+ if (type == 0 && lutmp->ut_type == utmp_entry->ut_type) {
+ /* one of RUN_LVL, BOOT_TIME, NEW_TIME, OLD_TIME */
+ return lutmp;
+ }
+ if (type == 1 && strncmp(lutmp->ut_id, utmp_entry->ut_id, sizeof(lutmp->ut_id)) == 0) {
+ /* INIT_PROCESS, LOGIN_PROCESS, USER_PROCESS, DEAD_PROCESS */
+ return lutmp;
+ }
}
return NULL;
}
-
+#if defined __UCLIBC_HAS_THREADS__
struct utmp *getutid(const struct utmp *utmp_entry)
{
- struct utmp *ret = NULL;
+ struct utmp *ret;
__UCLIBC_MUTEX_LOCK(utmplock);
ret = __getutid(utmp_entry);
__UCLIBC_MUTEX_UNLOCK(utmplock);
return ret;
}
-libc_hidden_def(getutid)
+#endif
struct utmp *getutline(const struct utmp *utmp_entry)
{
- struct utmp *lutmp = NULL;
+ struct utmp *lutmp;
__UCLIBC_MUTEX_LOCK(utmplock);
while ((lutmp = __getutent()) != NULL) {
- if ((lutmp->ut_type == USER_PROCESS || lutmp->ut_type == LOGIN_PROCESS) &&
- !strcmp(lutmp->ut_line, utmp_entry->ut_line)) {
- break;
+ if (lutmp->ut_type == USER_PROCESS || lutmp->ut_type == LOGIN_PROCESS) {
+ if (strncmp(lutmp->ut_line, utmp_entry->ut_line, sizeof(lutmp->ut_line)) == 0) {
+ break;
+ }
}
}
__UCLIBC_MUTEX_UNLOCK(utmplock);