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Diffstat (limited to 'libc/misc/utmp/utent.c')
-rw-r--r--libc/misc/utmp/utent.c194
1 files changed, 99 insertions, 95 deletions
diff --git a/libc/misc/utmp/utent.c b/libc/misc/utmp/utent.c
index c45820e3a..4d71f5e29 100644
--- a/libc/misc/utmp/utent.c
+++ b/libc/misc/utmp/utent.c
@@ -34,28 +34,28 @@ static const char *static_ut_name = default_file_name;
/* This function must be called with the LOCK held */
static void __setutent_unlocked(void)
{
- if (static_fd < 0) {
- static_fd = open_not_cancel_2(static_ut_name, O_RDWR | O_CLOEXEC);
if (static_fd < 0) {
- static_fd = open_not_cancel_2(static_ut_name, O_RDONLY | O_CLOEXEC);
- if (static_fd < 0) {
- return; /* static_fd remains < 0 */
- }
- }
+ static_fd = open_not_cancel_2(static_ut_name, O_RDWR | O_CLOEXEC);
+ if (static_fd < 0) {
+ static_fd = open_not_cancel_2(static_ut_name, O_RDONLY | O_CLOEXEC);
+ if (static_fd < 0) {
+ return; /* static_fd remains < 0 */
+ }
+ }
#ifndef __ASSUME_O_CLOEXEC
- /* Make sure the file will be closed on exec() */
- fcntl_not_cancel(static_fd, F_SETFD, FD_CLOEXEC);
+ /* Make sure the file will be closed on exec() */
+ fcntl_not_cancel(static_fd, F_SETFD, FD_CLOEXEC);
#endif
- return;
- }
- lseek(static_fd, 0, SEEK_SET);
+ return;
+ }
+ lseek(static_fd, 0, SEEK_SET);
}
#if defined __UCLIBC_HAS_THREADS__
void setutent(void)
{
- __UCLIBC_MUTEX_LOCK(utmplock);
- __setutent_unlocked();
- __UCLIBC_MUTEX_UNLOCK(utmplock);
+ __UCLIBC_MUTEX_LOCK(utmplock);
+ __setutent_unlocked();
+ __UCLIBC_MUTEX_UNLOCK(utmplock);
}
#else
strong_alias(__setutent_unlocked,setutent)
@@ -65,28 +65,28 @@ libc_hidden_def(setutent)
/* This function must be called with the LOCK held */
static struct utmp *__getutent_unlocked(void)
{
- if (static_fd < 0) {
- __setutent_unlocked();
if (static_fd < 0) {
- return NULL;
+ __setutent_unlocked();
+ if (static_fd < 0)
+ return NULL;
}
- }
- if (read_not_cancel(static_fd, &static_utmp, sizeof(static_utmp)) == sizeof(static_utmp)) {
- return &static_utmp;
- }
+ if (read_not_cancel(static_fd, &static_utmp,
+ sizeof(static_utmp)) == sizeof(static_utmp)) {
+ return &static_utmp;
+ }
- return NULL;
+ return NULL;
}
#if defined __UCLIBC_HAS_THREADS__
struct utmp *getutent(void)
{
- struct utmp *ret;
+ struct utmp *ret;
- __UCLIBC_MUTEX_LOCK(utmplock);
- ret = __getutent_unlocked();
- __UCLIBC_MUTEX_UNLOCK(utmplock);
- return ret;
+ __UCLIBC_MUTEX_LOCK(utmplock);
+ ret = __getutent_unlocked();
+ __UCLIBC_MUTEX_UNLOCK(utmplock);
+ return ret;
}
#else
strong_alias(__getutent_unlocked,getutent)
@@ -95,11 +95,11 @@ libc_hidden_def(getutent)
static void __endutent(void)
{
- __UCLIBC_MUTEX_LOCK(utmplock);
- if (static_fd >= 0)
- close_not_cancel_no_status(static_fd);
- static_fd = -1;
- __UCLIBC_MUTEX_UNLOCK(utmplock);
+ __UCLIBC_MUTEX_LOCK(utmplock);
+ if (static_fd >= 0)
+ close_not_cancel_no_status(static_fd);
+ static_fd = -1;
+ __UCLIBC_MUTEX_UNLOCK(utmplock);
}
strong_alias(__endutent,endutent)
libc_hidden_def(endutent)
@@ -107,36 +107,38 @@ libc_hidden_def(endutent)
/* This function must be called with the LOCK held */
static struct utmp *__getutid_unlocked(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_unlocked()) != NULL) {
- if (type == 0 && lutmp->ut_type == utmp_entry->ut_type) {
- /* one of RUN_LVL, BOOT_TIME, NEW_TIME, OLD_TIME */
- return lutmp;
+ 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_unlocked()) != NULL) {
+ 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;
+ }
}
- 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;
+ return NULL;
}
#if defined __UCLIBC_HAS_THREADS__
struct utmp *getutid(const struct utmp *utmp_entry)
{
- struct utmp *ret;
+ struct utmp *ret;
- __UCLIBC_MUTEX_LOCK(utmplock);
- ret = __getutid_unlocked(utmp_entry);
- __UCLIBC_MUTEX_UNLOCK(utmplock);
- return ret;
+ __UCLIBC_MUTEX_LOCK(utmplock);
+ ret = __getutid_unlocked(utmp_entry);
+ __UCLIBC_MUTEX_UNLOCK(utmplock);
+ return ret;
}
#else
strong_alias(__getutid_unlocked,getutid)
@@ -145,59 +147,61 @@ libc_hidden_def(getutid)
struct utmp *getutline(const struct utmp *utmp_entry)
{
- struct utmp *lutmp;
-
- __UCLIBC_MUTEX_LOCK(utmplock);
- while ((lutmp = __getutent_unlocked()) != NULL) {
- 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;
- }
+ struct utmp *lutmp;
+
+ __UCLIBC_MUTEX_LOCK(utmplock);
+ while ((lutmp = __getutent_unlocked()) != NULL) {
+ 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);
- return lutmp;
+ __UCLIBC_MUTEX_UNLOCK(utmplock);
+ return lutmp;
}
libc_hidden_def(getutline)
struct utmp *pututline(const struct utmp *utmp_entry)
{
- __UCLIBC_MUTEX_LOCK(utmplock);
- /* Ignore the return value. That way, if they've already positioned
- the file pointer where they want it, everything will work out. */
- lseek(static_fd, (off_t) - sizeof(struct utmp), SEEK_CUR);
-
- if (__getutid_unlocked(utmp_entry) != NULL)
+ __UCLIBC_MUTEX_LOCK(utmplock);
+ /* Ignore the return value. That way, if they've already positioned
+ the file pointer where they want it, everything will work out. */
lseek(static_fd, (off_t) - sizeof(struct utmp), SEEK_CUR);
- else
- lseek(static_fd, (off_t) 0, SEEK_END);
- if (write(static_fd, utmp_entry, sizeof(struct utmp)) != sizeof(struct utmp))
- utmp_entry = NULL;
- __UCLIBC_MUTEX_UNLOCK(utmplock);
- return (struct utmp *)utmp_entry;
+ if (__getutid_unlocked(utmp_entry) != NULL)
+ lseek(static_fd, (off_t) - sizeof(struct utmp), SEEK_CUR);
+ else
+ lseek(static_fd, (off_t) 0, SEEK_END);
+ if (write(static_fd, utmp_entry, sizeof(struct utmp))
+ != sizeof(struct utmp))
+ utmp_entry = NULL;
+
+ __UCLIBC_MUTEX_UNLOCK(utmplock);
+ return (struct utmp *)utmp_entry;
}
libc_hidden_def(pututline)
int utmpname(const char *new_ut_name)
{
- __UCLIBC_MUTEX_LOCK(utmplock);
- if (new_ut_name != NULL) {
- if (static_ut_name != default_file_name)
- free((char *)static_ut_name);
- static_ut_name = strdup(new_ut_name);
- if (static_ut_name == NULL) {
- /* We should probably whine about out-of-memory
- * errors here... Instead just reset to the default */
- static_ut_name = default_file_name;
+ __UCLIBC_MUTEX_LOCK(utmplock);
+ if (new_ut_name != NULL) {
+ if (static_ut_name != default_file_name)
+ free((char *)static_ut_name);
+ static_ut_name = strdup(new_ut_name);
+ if (static_ut_name == NULL) {
+ /* We should probably whine about out-of-memory
+ * errors here... Instead just reset to the default */
+ static_ut_name = default_file_name;
+ }
}
- }
- if (static_fd >= 0) {
- close_not_cancel_no_status(static_fd);
- static_fd = -1;
- }
- __UCLIBC_MUTEX_UNLOCK(utmplock);
- return 0; /* or maybe return -(static_ut_name != new_ut_name)? */
+ if (static_fd >= 0) {
+ close_not_cancel_no_status(static_fd);
+ static_fd = -1;
+ }
+ __UCLIBC_MUTEX_UNLOCK(utmplock);
+ return 0; /* or maybe return -(static_ut_name != new_ut_name)? */
}
libc_hidden_def(utmpname)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 22:00:10 +0000