use "glibc errno" trick not only for ash, but for entire busybox

(add/remove: 1/1 grow/shrink: 37/37 up/down: 139/-228)        Total: -89 bytes

4 files changed, 3 insertions, 23 deletions

diff --git a/libbb/error_msg.c b/libbb/error_msg.c
index b2141f3a2..5f53f0311 100644
--- a/libbb/error_msg.c
+++ b/libbb/error_msg.c
@@ -7,10 +7,6 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include <stdio.h>
-#include <errno.h>
-#include <string.h>
-#include <stdlib.h>
 #include "libbb.h"
 
 void bb_error_msg(const char *s, ...)
diff --git a/libbb/perror_msg.c b/libbb/perror_msg.c
index 7fb0830be..5145795f5 100644
--- a/libbb/perror_msg.c
+++ b/libbb/perror_msg.c
@@ -7,10 +7,6 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include <stdio.h>
-#include <errno.h>
-#include <string.h>
-#include <stdlib.h>
 #include "libbb.h"
 
 void bb_perror_msg(const char *s, ...)
diff --git a/libbb/run_shell.c b/libbb/run_shell.c
index 6be09088d..25d55dd63 100644
--- a/libbb/run_shell.c
+++ b/libbb/run_shell.c
@@ -28,19 +28,12 @@
  * SUCH DAMAGE.
  */
 
-#include <stdio.h>
-#include <errno.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdlib.h>
-#include <syslog.h>
-#include <ctype.h>
 #include "libbb.h"
-#ifdef CONFIG_SELINUX
+#if ENABLE_SELINUX
 #include <selinux/selinux.h>  /* for setexeccon  */
 #endif
 
-#ifdef CONFIG_SELINUX
+#if ENABLE_SELINUX
 static security_context_t current_sid;
 
 void
@@ -90,7 +83,7 @@ void run_shell(const char *shell, int loginshell, const char *command, const cha
                         args[argno++] = *additional_args;
         }
         args[argno] = NULL;
-#ifdef CONFIG_SELINUX
+#if ENABLE_SELINUX
         if (current_sid && !setexeccon(current_sid)) {
                 freecon(current_sid);
                 execve(shell, (char **) args, environ);
diff --git a/libbb/safe_write.c b/libbb/safe_write.c
index c81f1247f..5bbb82e84 100644
--- a/libbb/safe_write.c
+++ b/libbb/safe_write.c
@@ -7,13 +7,8 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include <stdio.h>
-#include <errno.h>
-#include <unistd.h>
 #include "libbb.h"
 
-
-
 ssize_t safe_write(int fd, const void *buf, size_t count)
 {
         ssize_t n;