done a dozen of randconfig test. guess what? ALL failed...

these are resulting fixes

1 files changed, 17 insertions, 15 deletions

diff --git a/miscutils/taskset.c b/miscutils/taskset.c
index 4496aa5..a4d41ac 100644
--- a/miscutils/taskset.c
+++ b/miscutils/taskset.c
@@ -8,14 +8,14 @@
 
 #include "busybox.h"
 #include <sched.h>
-#include <unistd.h>
 #include <getopt.h> /* optind */
 
 #if ENABLE_FEATURE_TASKSET_FANCY
 #define TASKSET_PRINTF_MASK "%s"
 #define from_cpuset(x) __from_cpuset(&x)
 /* craft a string from the mask */
-static char *__from_cpuset(cpu_set_t *mask) {
+static char *__from_cpuset(cpu_set_t *mask)
+{
 	int i;
 	char *ret = 0, *str = xzalloc(9);
 
@@ -34,22 +34,24 @@ static char *__from_cpuset(cpu_set_t *mask) {
 }
 #else
 #define TASKSET_PRINTF_MASK "%x"
-#define from_cpuset(mask) mask
+/* (void*) cast is for battling gcc: */
+/* "dereferencing type-punned pointer will break strict-aliasing rules" */
+#define from_cpuset(mask) (*(unsigned*)(void*)&(mask))
 #endif
 
-#define TASKSET_OPT_p (1)
+#define OPT_p 1
 
 int taskset_main(int argc, char** argv)
 {
 	cpu_set_t mask, new_mask;
 	pid_t pid = 0;
-	unsigned long ul;
+	unsigned opt;
 	const char *state = "current\0new";
 	char *p_opt = NULL, *aff = NULL;
 
-	ul = getopt32(argc, argv, "+p:", &p_opt);
+	opt = getopt32(argc, argv, "+p:", &p_opt);
 
-	if (ul & TASKSET_OPT_p) {
+	if (opt & OPT_p) {
 		if (argc == optind+1) { /* -p <aff> <pid> */
 			aff = p_opt;
 			p_opt = argv[optind];
@@ -70,19 +72,19 @@ int taskset_main(int argc, char** argv)
 		}
 	}
 
-	if (ul & TASKSET_OPT_p) {
-print_aff:
-		if (sched_getaffinity(pid, sizeof (mask), &mask) < 0)
-			bb_perror_msg_and_die("Failed to %cet pid %d's affinity", 'g', pid);
+	if (opt & OPT_p) {
+ print_aff:
+		if (sched_getaffinity(pid, sizeof(mask), &mask) < 0)
+			bb_perror_msg_and_die("failed to %cet pid %d's affinity", 'g', pid);
 		printf("pid %d's %s affinity mask: "TASKSET_PRINTF_MASK"\n",
 				pid, state, from_cpuset(mask));
 		if (!*argv) /* no new affinity given or we did print already, done. */
 			return EXIT_SUCCESS;
 	}
 
-	if (sched_setaffinity(pid, sizeof (new_mask), &new_mask))
-		bb_perror_msg_and_die("Failed to %cet pid %d's affinity", 's', pid);
-	if (ul & TASKSET_OPT_p) {
+	if (sched_setaffinity(pid, sizeof(new_mask), &new_mask))
+		bb_perror_msg_and_die("failed to %cet pid %d's affinity", 's', pid);
+	if (opt & OPT_p) {
 		state += 8;
 		++argv;
 		goto print_aff;
@@ -91,6 +93,6 @@ print_aff:
 	execvp(*argv, argv);
 	bb_perror_msg_and_die("%s", *argv);
 }
-#undef TASKSET_OPT_p
+#undef OPT_p
 #undef TASKSET_PRINTF_MASK
 #undef from_cpuset