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-rw-r--r--libc/inet/hostid.c31
-rw-r--r--libc/pwd_grp/lckpwdf.c36
-rw-r--r--libc/signal/sigblock.c3
-rw-r--r--libc/signal/sigintr.c1
-rw-r--r--libc/signal/sigjmp.c2
-rw-r--r--libc/signal/signal.c1
-rw-r--r--libc/signal/sigset.c8
-rw-r--r--libc/signal/sigsetmask.c3
-rw-r--r--libc/signal/sigwait.c2
-rw-r--r--libc/signal/sysv_signal.c1
-rw-r--r--libc/stdlib/abort.c2
-rw-r--r--libc/sysdeps/linux/alpha/sigprocmask.c2
-rw-r--r--libc/sysdeps/linux/common/longjmp.c3
-rw-r--r--libc/sysdeps/linux/common/sigprocmask.c4
-rw-r--r--libc/unistd/sleep.c27
15 files changed, 42 insertions, 84 deletions
diff --git a/libc/inet/hostid.c b/libc/inet/hostid.c
index 42ee53fbd..cadcd1b28 100644
--- a/libc/inet/hostid.c
+++ b/libc/inet/hostid.c
@@ -33,11 +33,13 @@ int sethostid(long int new_id)
int fd;
int ret;
- if (geteuid() || getuid()) return __set_errno(EPERM);
- if ((fd=open(HOSTID,O_CREAT|O_WRONLY,0644))<0) return -1;
- ret = write(fd,(void *)&new_id,sizeof(new_id)) == sizeof(new_id)
- ? 0 : -1;
- close (fd);
+ if (geteuid() || getuid())
+ return __set_errno(EPERM);
+ fd = open(HOSTID, O_CREAT|O_WRONLY, 0644);
+ if (fd < 0)
+ return fd;
+ ret = write(fd, &new_id, sizeof(new_id)) == sizeof(new_id) ? 0 : -1;
+ close(fd);
return ret;
}
#endif
@@ -51,7 +53,8 @@ long int gethostid(void)
* It is not an error if we cannot read this file. It is not even an
* error if we cannot read all the bytes, we just carry on trying...
*/
- if ((fd=open(HOSTID,O_RDONLY))>=0 && read(fd,(void *)&id,sizeof(id)))
+ fd = open(HOSTID, O_RDONLY);
+ if (fd >= 0 && read(fd, &id, sizeof(id)))
{
close (fd);
return id;
@@ -69,7 +72,7 @@ long int gethostid(void)
* setting one anyway.
* Mitch
*/
- if (gethostname(host,MAXHOSTNAMELEN)>=0 && *host) {
+ if (gethostname(host, MAXHOSTNAMELEN) >= 0 && *host) {
struct hostent *hp;
struct in_addr in;
struct hostent ghbn_h;
@@ -84,21 +87,17 @@ long int gethostid(void)
/*if ((hp = gethostbyname(host)) == (struct hostent *)NULL)*/
gethostbyname_r(host, &ghbn_h, ghbn_buf, sizeof(ghbn_buf), &hp, &ghbn_errno);
- if (hp == (struct hostent *)NULL)
-
+ if (hp == NULL) {
/* This is not a error if we get here, as all it means is that
* this host is not on a network and/or they have not
* configured their network properly. So we return the unset
* hostid which should be 0, meaning that they should set it !!
*/
return 0;
- else {
- memcpy((char *) &in, (char *) hp->h_addr, hp->h_length);
-
- /* Just so it doesn't look exactly like the IP addr */
- return(in.s_addr<<16|in.s_addr>>16);
}
+ memcpy(&in, hp->h_addr, hp->h_length);
+ /* Just so it doesn't look exactly like the IP addr */
+ return (in.s_addr<<16 | in.s_addr>>16);
}
- else return 0;
-
+ return 0;
}
diff --git a/libc/pwd_grp/lckpwdf.c b/libc/pwd_grp/lckpwdf.c
index 9b0b604e0..c0c8f0d90 100644
--- a/libc/pwd_grp/lckpwdf.c
+++ b/libc/pwd_grp/lckpwdf.c
@@ -80,25 +80,8 @@ lckpwdf (void)
/* Make sure file gets correctly closed when process finished. */
flags = fcntl (lock_fd, F_GETFD);
-#if 0 /* never fails */
- if (flags == -1) {
- /* Cannot get file flags. */
- close(lock_fd);
- lock_fd = -1;
- goto DONE;
- }
-#endif
flags |= FD_CLOEXEC;
-#if 1
fcntl (lock_fd, F_SETFD, flags);
-#else /* never fails */
- if (fcntl (lock_fd, F_SETFD, flags) < 0) {
- /* Cannot set new flags. */
- close(lock_fd);
- lock_fd = -1;
- goto DONE;
- }
-#endif
/* Now we have to get exclusive write access. Since multiple
process could try this we won't stop when it first fails.
Instead we set a timeout for the system call. Once the timer
@@ -112,27 +95,14 @@ lckpwdf (void)
new_act.sa_handler = noop_handler;
__sigfillset (&new_act.sa_mask);
- /* Install new action handler for alarm and save old. */
- if (sigaction (SIGALRM, &new_act, &saved_act) < 0) {
- /* Cannot install signal handler. */
- close(lock_fd);
- lock_fd = -1;
- goto DONE;
- }
+ /* Install new action handler for alarm and save old.
+ * This never fails in Linux. */
+ sigaction (SIGALRM, &new_act, &saved_act);
/* Now make sure the alarm signal is not blocked. */
__sigemptyset (&new_set);
__sigaddset (&new_set, SIGALRM);
-#if 1
sigprocmask (SIG_UNBLOCK, &new_set, &saved_set);
-#else /* never fails */
- if (sigprocmask (SIG_UNBLOCK, &new_set, &saved_set) < 0) {
- sigaction (SIGALRM, &saved_act, NULL);
- close(lock_fd);
- lock_fd = -1;
- goto DONE;
- }
-#endif
/* Start timer. If we cannot get the lock in the specified time we
get a signal. */
diff --git a/libc/signal/sigblock.c b/libc/signal/sigblock.c
index 72b42c45e..5a16f336b 100644
--- a/libc/signal/sigblock.c
+++ b/libc/signal/sigblock.c
@@ -32,8 +32,7 @@ int sigblock (int mask)
sigset_t set, oset;
sigset_set_old_mask (&set, mask);
- if (sigprocmask (SIG_BLOCK, &set, &oset) < 0)
- return -1;
+ sigprocmask (SIG_BLOCK, &set, &oset); /* can't fail */
return sigset_get_old_mask (&oset);
}
libc_hidden_def(sigblock)
diff --git a/libc/signal/sigintr.c b/libc/signal/sigintr.c
index 23f87e199..1a8d60eb2 100644
--- a/libc/signal/sigintr.c
+++ b/libc/signal/sigintr.c
@@ -34,6 +34,7 @@ int siginterrupt (int sig, int interrupt)
#ifdef SA_RESTART
struct sigaction action;
+ /* Fails if sig is bad. */
if (sigaction (sig, NULL, &action) < 0)
return -1;
diff --git a/libc/signal/sigjmp.c b/libc/signal/sigjmp.c
index d83b49a0b..646949935 100644
--- a/libc/signal/sigjmp.c
+++ b/libc/signal/sigjmp.c
@@ -31,7 +31,7 @@ int __sigjmp_save (sigjmp_buf env, int savemask) attribute_hidden;
int __sigjmp_save (sigjmp_buf env, int savemask)
{
env[0].__mask_was_saved = (savemask &&
- sigprocmask (SIG_BLOCK, (sigset_t *) NULL, &env[0].__saved_mask) == 0);
+ sigprocmask (SIG_BLOCK, NULL, &env[0].__saved_mask) == 0);
return 0;
}
diff --git a/libc/signal/signal.c b/libc/signal/signal.c
index 0ed281ab1..f3dfa33fc 100644
--- a/libc/signal/signal.c
+++ b/libc/signal/signal.c
@@ -45,6 +45,7 @@ __bsd_signal (int sig, __sighandler_t handler)
__sigemptyset (&act.sa_mask);
__sigaddset (&act.sa_mask, sig);
act.sa_flags = __sigismember (&_sigintr, sig) ? 0 : SA_RESTART;
+ /* In Linux (as of 2.6.25), fails only if sig is SIGKILL or SIGSTOP */
if (sigaction (sig, &act, &oact) < 0)
return SIG_ERR;
diff --git a/libc/signal/sigset.c b/libc/signal/sigset.c
index 91f433661..03f3dc869 100644
--- a/libc/signal/sigset.c
+++ b/libc/signal/sigset.c
@@ -42,13 +42,11 @@ __sighandler_t sigset (int sig, __sighandler_t disp)
/* Handle SIG_HOLD first. */
if (disp == SIG_HOLD)
{
- /* Create an empty signal set. */
__sigemptyset (&set);
__sigaddset (&set, sig);
/* Add the signal set to the current signal mask. */
- if (sigprocmask (SIG_BLOCK, &set, NULL) < 0)
- return SIG_ERR;
+ sigprocmask (SIG_BLOCK, &set, NULL); /* can't fail */
return SIG_HOLD;
}
@@ -56,6 +54,7 @@ __sighandler_t sigset (int sig, __sighandler_t disp)
memset(&act, 0, sizeof(act));
act.sa_handler = disp;
+ /* In Linux (as of 2.6.25), fails only if sig is SIGKILL or SIGSTOP */
if (sigaction (sig, &act, &oact) < 0)
return SIG_ERR;
@@ -64,8 +63,7 @@ __sighandler_t sigset (int sig, __sighandler_t disp)
__sigaddset (&set, sig);
/* Remove the signal set from the current signal mask. */
- if (sigprocmask (SIG_UNBLOCK, &set, NULL) < 0)
- return SIG_ERR;
+ sigprocmask (SIG_UNBLOCK, &set, NULL); /* can't fail */
return oact.sa_handler;
}
diff --git a/libc/signal/sigsetmask.c b/libc/signal/sigsetmask.c
index 9349deb38..f8784e288 100644
--- a/libc/signal/sigsetmask.c
+++ b/libc/signal/sigsetmask.c
@@ -33,8 +33,7 @@ sigsetmask (int mask)
sigset_t set, oset;
sigset_set_old_mask (&set, mask);
- if (sigprocmask (SIG_SETMASK, &set, &oset) < 0)
- return -1;
+ sigprocmask (SIG_SETMASK, &set, &oset); /* can't fail */
return sigset_get_old_mask (&oset);
}
libc_hidden_def(sigsetmask)
diff --git a/libc/signal/sigwait.c b/libc/signal/sigwait.c
index 64a889f7b..bed7f979a 100644
--- a/libc/signal/sigwait.c
+++ b/libc/signal/sigwait.c
@@ -74,6 +74,8 @@ int __sigwait (const sigset_t *set, int *sig)
__sigdelset (&tmp_mask, this);
/* Register temporary action handler. */
+ /* In Linux (as of 2.6.25), fails only if sig is SIGKILL or SIGSTOP */
+ /* (so, will it work correctly if set has, say, SIGSTOP?) */
if (sigaction (this, &action, &saved[this]) != 0)
goto restore_handler;
}
diff --git a/libc/signal/sysv_signal.c b/libc/signal/sysv_signal.c
index f573482f9..118094b27 100644
--- a/libc/signal/sysv_signal.c
+++ b/libc/signal/sysv_signal.c
@@ -49,6 +49,7 @@ __sighandler_t __sysv_signal (int sig, __sighandler_t handler)
act.sa_handler = handler;
__sigemptyset (&act.sa_mask);
act.sa_flags = (SA_ONESHOT | SA_NOMASK | SA_INTERRUPT) & ~SA_RESTART;
+ /* In Linux (as of 2.6.25), fails only if sig is SIGKILL or SIGSTOP */
if (sigaction (sig, &act, &oact) < 0)
return SIG_ERR;
diff --git a/libc/stdlib/abort.c b/libc/stdlib/abort.c
index 9f0fe54b8..fcf90187c 100644
--- a/libc/stdlib/abort.c
+++ b/libc/stdlib/abort.c
@@ -62,7 +62,7 @@ void abort(void)
/* Unmask SIGABRT to be sure we can get it */
__sigemptyset(&sigs);
__sigaddset(&sigs, SIGABRT);
- sigprocmask(SIG_UNBLOCK, &sigs, (sigset_t *) NULL);
+ sigprocmask(SIG_UNBLOCK, &sigs, NULL);
while (1) {
/* Try to suicide with a SIGABRT */
diff --git a/libc/sysdeps/linux/alpha/sigprocmask.c b/libc/sysdeps/linux/alpha/sigprocmask.c
index e143f61e3..832684cef 100644
--- a/libc/sysdeps/linux/alpha/sigprocmask.c
+++ b/libc/sysdeps/linux/alpha/sigprocmask.c
@@ -44,7 +44,7 @@ sigprocmask (int how, const sigset_t *set, sigset_t *oset)
result = osf_sigprocmask(how, setval);
if (result == -1)
- /* If there are ever more than 63 signals, we need to recode this
+ /* If there are ever more than 64 signals, we need to recode this
in assembler since we wouldn't be able to distinguish a mask of
all 1s from -1, but for now, we're doing just fine... */
return result;
diff --git a/libc/sysdeps/linux/common/longjmp.c b/libc/sysdeps/linux/common/longjmp.c
index 672754a73..e600c7f13 100644
--- a/libc/sysdeps/linux/common/longjmp.c
+++ b/libc/sysdeps/linux/common/longjmp.c
@@ -38,8 +38,7 @@ void __libc_longjmp (sigjmp_buf env, int val)
if (env[0].__mask_was_saved)
/* Restore the saved signal mask. */
- (void) sigprocmask (SIG_SETMASK, &env[0].__saved_mask,
- (sigset_t *) NULL);
+ (void) sigprocmask (SIG_SETMASK, &env[0].__saved_mask, NULL);
/* Call the machine-dependent function to restore machine state. */
__longjmp (env[0].__jmpbuf, val ?: 1);
diff --git a/libc/sysdeps/linux/common/sigprocmask.c b/libc/sysdeps/linux/common/sigprocmask.c
index a9a913e10..febdca014 100644
--- a/libc/sysdeps/linux/common/sigprocmask.c
+++ b/libc/sysdeps/linux/common/sigprocmask.c
@@ -28,7 +28,7 @@ int sigprocmask(int how, const sigset_t * set, sigset_t * oldset)
if (set &&
# if (SIG_BLOCK == 0) && (SIG_UNBLOCK == 1) && (SIG_SETMASK == 2)
(((unsigned int) how) > 2)
-#elif (SIG_BLOCK == 1) && (SIG_UNBLOCK == 2) && (SIG_SETMASK == 3)
+# elif (SIG_BLOCK == 1) && (SIG_UNBLOCK == 2) && (SIG_SETMASK == 3)
(((unsigned int)(how-1)) > 2)
# else
# warning "compile time assumption violated.. slow path..."
@@ -55,7 +55,7 @@ int sigprocmask(int how, const sigset_t * set, sigset_t * oldset)
if (set &&
# if (SIG_BLOCK == 0) && (SIG_UNBLOCK == 1) && (SIG_SETMASK == 2)
(((unsigned int) how) > 2)
-#elif (SIG_BLOCK == 1) && (SIG_UNBLOCK == 2) && (SIG_SETMASK == 3)
+# elif (SIG_BLOCK == 1) && (SIG_UNBLOCK == 2) && (SIG_SETMASK == 3)
(((unsigned int)(how-1)) > 2)
# else
# warning "compile time assumption violated.. slow path..."
diff --git a/libc/unistd/sleep.c b/libc/unistd/sleep.c
index 8cac306ce..4d55d843d 100644
--- a/libc/unistd/sleep.c
+++ b/libc/unistd/sleep.c
@@ -68,8 +68,7 @@ unsigned int sleep (unsigned int seconds)
in libc. We block SIGCHLD first. */
__sigemptyset (&set);
__sigaddset (&set, SIGCHLD);
- if (sigprocmask (SIG_BLOCK, &set, &oset))
- return -1;
+ sigprocmask (SIG_BLOCK, &set, &oset); /* can't fail */
/* If SIGCHLD is already blocked, we don't have to do anything. */
if (!__sigismember (&oset, SIGCHLD))
@@ -80,15 +79,7 @@ unsigned int sleep (unsigned int seconds)
__sigemptyset (&set);
__sigaddset (&set, SIGCHLD);
- /* We get the signal handler for SIGCHLD. */
- if (sigaction (SIGCHLD, (struct sigaction *) NULL, &oact) < 0)
- {
- saved_errno = errno;
- /* Restore the original signal mask. */
- (void) sigprocmask (SIG_SETMASK, &oset, (sigset_t *) NULL);
- __set_errno (saved_errno);
- return -1;
- }
+ sigaction (SIGCHLD, NULL, &oact); /* never fails */
if (oact.sa_handler == SIG_IGN)
{
@@ -97,13 +88,13 @@ unsigned int sleep (unsigned int seconds)
saved_errno = errno;
/* Restore the original signal mask. */
- (void) sigprocmask (SIG_SETMASK, &oset, (sigset_t *) NULL);
+ sigprocmask (SIG_SETMASK, &oset, NULL);
__set_errno (saved_errno);
}
else
{
/* We should unblock SIGCHLD. Restore the original signal mask. */
- (void) sigprocmask (SIG_SETMASK, &oset, (sigset_t *) NULL);
+ sigprocmask (SIG_SETMASK, &oset, NULL);
result = nanosleep (&ts, &ts);
}
}
@@ -138,27 +129,25 @@ unsigned int sleep (unsigned int seconds)
/* block SIGALRM */
__sigemptyset (&set);
__sigaddset (&set, SIGALRM);
- if (sigprocmask (SIG_BLOCK, &set, &oset))
- return seconds;
+ sigprocmask (SIG_BLOCK, &set, &oset); /* can't fail */
act.sa_handler = sleep_alarm_handler;
act.sa_flags = 0;
act.sa_mask = oset;
- if (sigaction(SIGALRM, &act, &oact) < 0)
- return seconds;
+ sigaction(SIGALRM, &act, &oact); /* never fails */
before = time(NULL);
remaining = alarm(seconds);
if (remaining && remaining > seconds) {
/* restore user's alarm */
- (void) sigaction(SIGALRM, &oact, (struct sigaction *) NULL);
+ sigaction(SIGALRM, &oact, NULL);
alarm(remaining); /* restore old alarm */
sigsuspend(&oset);
after = time(NULL);
} else {
sigsuspend (&oset);
after = time(NULL);
- (void) sigaction (SIGALRM, &oact, NULL);
+ sigaction (SIGALRM, &oact, NULL);
}
result = after - before;
alarm(remaining > result ? remaining - result : 0);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 21:39:32 +0000