setjmp: optimize longjmp prologues

[musl] / src / linux / prlimit.c

diff --git a/src/linux/prlimit.c b/src/linux/prlimit.c
index d1639cc..3df9ffb 100644 (file)
--- a/src/linux/prlimit.c
+++ b/src/linux/prlimit.c
@@ -1,12 +1,26 @@
 #define _GNU_SOURCE
 #include <sys/resource.h>
 #include "syscall.h"
-#include "libc.h"
+
+#define FIX(x) do{ if ((x)>=SYSCALL_RLIM_INFINITY) (x)=RLIM_INFINITY; }while(0)
 
 int prlimit(pid_t pid, int resource, const struct rlimit *new_limit, struct rlimit *old_limit)
 {
-       return syscall(SYS_prlimit64, pid, resource, new_limit, old_limit);
+       struct rlimit tmp;
+       int r;
+       if (new_limit && SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
+               tmp = *new_limit;
+               FIX(tmp.rlim_cur);
+               FIX(tmp.rlim_max);
+               new_limit = &tmp;
+       }
+       r = syscall(SYS_prlimit64, pid, resource, new_limit, old_limit);
+       if (!r && old_limit && SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
+               FIX(old_limit->rlim_cur);
+               FIX(old_limit->rlim_max);
+       }
+       return r;
 }
 
 #undef prlimit64
-LFS64(prlimit);
+weak_alias(prlimit, prlimit64);