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remove useless return value checks for functions that cannot fail
[musl]
/
src
/
signal
/
sigaltstack.c
diff --git
a/src/signal/sigaltstack.c
b/src/signal/sigaltstack.c
index
3cc2d45
..
6e46d09
100644
(file)
--- a/
src/signal/sigaltstack.c
+++ b/
src/signal/sigaltstack.c
@@
-1,8
+1,18
@@
#include <signal.h>
#include <signal.h>
+#include <errno.h>
#include "syscall.h"
int sigaltstack(const stack_t *ss, stack_t *old)
{
#include "syscall.h"
int sigaltstack(const stack_t *ss, stack_t *old)
{
- /* depends on kernel struct matching */
+ if (ss) {
+ if (ss->ss_size < MINSIGSTKSZ) {
+ errno = ENOMEM;
+ return -1;
+ }
+ if (ss->ss_flags & ~SS_DISABLE) {
+ errno = EINVAL;
+ return -1;
+ }
+ }
return syscall2(__NR_sigaltstack, (long)ss, (long)old);
}
return syscall2(__NR_sigaltstack, (long)ss, (long)old);
}