nice: return EPERM instead of EACCES

To comply with POSIX, change errno from EACCES to EPERM
when the caller did not have the required privilege.

diff --git a/src/unistd/nice.c b/src/unistd/nice.c
index 6c25c8c..1c2295f 100644 (file)
--- a/src/unistd/nice.c
+++ b/src/unistd/nice.c
@@ -1,4 +1,5 @@
 #include <unistd.h>
+#include <errno.h>
 #include <sys/resource.h>
 #include <limits.h>
 #include "syscall.h"
@@ -12,5 +13,11 @@ int nice(int inc)
                prio += getpriority(PRIO_PROCESS, 0);
        if (prio > NZERO-1) prio = NZERO-1;
        if (prio < -NZERO) prio = -NZERO;
-       return setpriority(PRIO_PROCESS, 0, prio) ? -1 : prio;
+       if (setpriority(PRIO_PROCESS, 0, prio)) {
+               if (errno == EACCES)
+                       errno = EPERM;
+               return -1;
+       } else {
+               return prio;
+       }
 }