Use symbolic names for standard file descriptors.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

lib/unixcompat.h

@@ -23,6 +23,8 @@
 #include <time.h>               /* AIX for tm */
 #endif
 
+#include <unistd.h>
+
 /*** typedefs(not structures) and defined constants **********************************************/
 
 #ifndef major
@@ -40,6 +42,18 @@
 #define makedev(major,minor) ((((major) & 0xff) << 8) | ((minor) & 0xff))
 #endif
 
+#ifndef STDIN_FILENO
+#define STDIN_FILENO 0
+#endif
+
+#ifndef STDOUT_FILENO
+#define STDOUT_FILENO 1
+#endif
+
+#ifndef STDERR_FILENO
+#define STDERR_FILENO 2
+#endif
+
 /*** enums ***************************************************************************************/
 
 /*** structures declarations (and typedefs of structures)*****************************************/

lib/utilunix.c

@@ -58,11 +58,12 @@
 #ifdef HAVE_GET_PROCESS_STATS
 #include <sys/procstats.h>
 #endif
-#include <unistd.h>
 #include <pwd.h>
 #include <grp.h>
 
 #include "lib/global.h"
+
+#include "lib/unixcompat.h"
 #include "lib/vfs/vfs.h"        /* VFS_ENCODING_PREFIX */
 #include "lib/strutil.h"        /* str_move() */
 #include "lib/util.h"
@@ -516,8 +517,8 @@ open_error_pipe (void)
     {
         message (D_NORMAL, _("Warning"), _("Pipe failed"));
     }
-    old_error = dup (2);
-    if (old_error < 0 || close (2) || dup (error_pipe[1]) != 2)
+    old_error = dup (STDERR_FILENO);
+    if (old_error < 0 || close (STDERR_FILENO) != 0 || dup (error_pipe[1]) != STDERR_FILENO)
     {
         message (D_NORMAL, _("Warning"), _("Dup failed"));
 
@@ -577,7 +578,7 @@ close_error_pipe (int error, const char *text)
         title = _("Warning");
     if (old_error >= 0)
     {
-        if (dup2 (old_error, 2) == -1)
+        if (dup2 (old_error, STDERR_FILENO) == -1)
         {
             if (error < 0)
                 error = D_ERROR;

lib/vfs/utilvfs.c

@@ -38,7 +38,6 @@
 #include <grp.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 
 #include "lib/global.h"
 #include "lib/unixcompat.h"

src/background.c

@@ -43,10 +43,11 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/wait.h>           /* waitpid() */
-#include <unistd.h>
 #include <fcntl.h>
 
 #include "lib/global.h"
+
+#include "lib/unixcompat.h"
 #include "lib/tty/key.h"        /* add_select_channel(), delete_select_channel() */
 #include "lib/widget.h"         /* message() */
 #include "lib/event-types.h"
@@ -547,18 +548,18 @@ do_background (file_op_context_t * ctx, char *info)
         top_dlg = NULL;
 
         /* Make stdin/stdout/stderr point somewhere */
-        close (0);
-        close (1);
-        close (2);
+        close (STDIN_FILENO);
+        close (STDOUT_FILENO);
+        close (STDERR_FILENO);
 
         nullfd = open ("/dev/null", O_RDWR);
         if (nullfd != -1)
         {
-            while (dup2 (nullfd, 0) == -1 && errno == EINTR)
+            while (dup2 (nullfd, STDIN_FILENO) == -1 && errno == EINTR)
                 ;
-            while (dup2 (nullfd, 1) == -1 && errno == EINTR)
+            while (dup2 (nullfd, STDOUT_FILENO) == -1 && errno == EINTR)
                 ;
-            while (dup2 (nullfd, 2) == -1 && errno == EINTR)
+            while (dup2 (nullfd, STDERR_FILENO) == -1 && errno == EINTR)
                 ;
         }
 

src/cons.handler.c

@@ -39,10 +39,10 @@
 #include <sys/ioctl.h>
 #endif
 #endif
-#include <unistd.h>
 
 #include "lib/global.h"
 
+#include "lib/unixcompat.h"
 #include "lib/tty/tty.h"
 #include "lib/skin.h"           /* tty_set_normal_attrs */
 #include "lib/tty/win.h"
@@ -193,17 +193,17 @@ handle_console_linux (console_action_t action)
             /* Bind the pipe 0 to the standard input */
             do
             {
-                if (dup2 (pipefd1[0], 0) == -1)
+                if (dup2 (pipefd1[0], STDIN_FILENO) == -1)
                     break;
                 status = close (pipefd1[0]);
                 /* Bind the pipe 1 to the standard output */
-                if (dup2 (pipefd2[1], 1) == -1)
+                if (dup2 (pipefd2[1], STDOUT_FILENO) == -1)
                     break;
 
                 status = close (pipefd2[1]);
                 /* Bind standard error to /dev/null */
                 status = open ("/dev/null", O_WRONLY);
-                if (dup2 (status, 2) == -1)
+                if (dup2 (status, STDERR_FILENO) == -1)
                     break;
                 status = close (status);
                 if (tty_name != NULL)

src/consaver/cons.saver.c

@@ -67,7 +67,8 @@
 #endif
 #include <fcntl.h>
 #include <termios.h>
-#include <unistd.h>
+
+#include "lib/unixcompat.h"     /* STDERR_FILENO */
 
 #define LINUX_CONS_SAVER_C
 #include "cons.saver.h"
@@ -164,7 +165,7 @@ main (int argc, char **argv)
     const char *p, *q;
     struct winsize winsz;
 
-    close (2);
+    close (STDERR_FILENO);
 
     if (argc != 2)
         die ();

src/filemanager/panel.c

@@ -37,7 +37,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 
 #include "lib/global.h"
 

src/subshell.c

@@ -47,7 +47,6 @@
 #include <sys/ioctl.h>
 #endif
 #include <termios.h>
-#include <unistd.h>
 
 #ifdef HAVE_STROPTS_H
 #include <stropts.h>            /* For I_PUSH */
@@ -55,6 +54,7 @@
 
 #include "lib/global.h"
 
+#include "lib/unixcompat.h"
 #include "lib/tty/tty.h"        /* LINES */
 #include "lib/tty/key.h"        /* XCTRL */
 #include "lib/vfs/vfs.h"
@@ -94,18 +94,6 @@ gboolean update_subshell_prompt = FALSE;
 #define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
 #endif
 
-#ifndef STDIN_FILENO
-#define STDIN_FILENO 0
-#endif
-
-#ifndef STDOUT_FILENO
-#define STDOUT_FILENO 1
-#endif
-
-#ifndef STDERR_FILENO
-#define STDERR_FILENO 2
-#endif
-
 /* Initial length of the buffer for the subshell's prompt */
 #define INITIAL_PROMPT_SIZE 10
 

src/vfs/cpio/cpio.c

@@ -36,7 +36,6 @@
 #include <fcntl.h>
 #include <sys/types.h>
 #include <sys/stat.h>
-#include <unistd.h>
 
 #include "lib/global.h"
 #include "lib/unixcompat.h"

src/vfs/fish/fish.c

@@ -332,11 +332,11 @@ fish_pipeopen (struct vfs_s_super *super, const char *path, const char *argv[])
     }
     else
     {
-        res = dup2 (fileset1[0], 0);
+        res = dup2 (fileset1[0], STDIN_FILENO);
         close (fileset1[0]);
         close (fileset1[1]);
-        res = dup2 (fileset2[1], 1);
-        close (2);
+        res = dup2 (fileset2[1], STDOUT_FILENO);
+        close (STDERR_FILENO);
         /* stderr to /dev/null */
         res = open ("/dev/null", O_WRONLY);
         close (fileset2[0]);