busybox: refresh the flock patch

Upstream accepted the flock fix with some improvements. Backport those
changes.

(From OE-Core rev: 16813b55d1cd624820f955ab752c922f305856e8)

Signed-off-by: Maxin B. John <maxin.john@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 34 insertions, 43 deletions

diff --git a/meta/recipes-core/busybox/busybox/0001-flock-update-the-behaviour-of-c-parameter-to-match-u.patch b/meta/recipes-core/busybox/busybox/0001-flock-update-the-behaviour-of-c-parameter-to-match-u.patch
index 8bcbd73de9..78520f0d90 100644
--- a/meta/recipes-core/busybox/busybox/0001-flock-update-the-behaviour-of-c-parameter-to-match-u.patch
+++ b/meta/recipes-core/busybox/busybox/0001-flock-update-the-behaviour-of-c-parameter-to-match-u.patch
@@ -1,35 +1,24 @@
-From 198f18addf1d814c2fefcb492f3b9fbd221669bb Mon Sep 17 00:00:00 2001
-From: "Maxin B. John" <maxin.john@intel.com>
-Date: Wed, 20 Apr 2016 18:24:45 +0300
-Subject: [PATCH] flock: update the behaviour of -c parameter to match upstream
-
-In upstream, -c 'PROG ARGS' means "run sh -c 'PROG ARGS'"
+From e1d426fd65c00a6d01a10d85edf8a294ae8a2d2b Mon Sep 17 00:00:00 2001
+From: Denys Vlasenko <vda.linux@googlemail.com>
+Date: Sun, 24 Apr 2016 18:19:49 +0200
+Subject: [PATCH] flock: fix -c; improve error handling of fork+exec
 
 function                                             old     new   delta
-flock_main                                           286     377     +91
-.rodata                                           155849  155890     +41
+flock_main                                           254     334     +80
 
-Upstream-Status: Submitted
-[ http://lists.busybox.net/pipermail/busybox/2016-April/084142.html ]
+Upstream-Status: Backport
 
+Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 Signed-off-by: Maxin B. John <maxin.john@intel.com>
 ---
- util-linux/flock.c | 20 ++++++++++++++------
- 1 file changed, 14 insertions(+), 6 deletions(-)
+ util-linux/flock.c | 19 +++++++++++++++++--
+ 1 file changed, 17 insertions(+), 2 deletions(-)
 
 diff --git a/util-linux/flock.c b/util-linux/flock.c
-index 05a747f..c85a25d 100644
+index 05a747f..539a835 100644
 --- a/util-linux/flock.c
 +++ b/util-linux/flock.c
-@@ -20,6 +20,7 @@ int flock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
- int flock_main(int argc UNUSED_PARAM, char **argv)
- {
-        int mode, opt, fd;
-+    char *cmd_args[4];
-        enum {
-                OPT_s = (1 << 0),
-                OPT_x = (1 << 1),
-@@ -57,7 +58,6 @@ int flock_main(int argc UNUSED_PARAM, char **argv)
+@@ -57,7 +57,6 @@ int flock_main(int argc UNUSED_PARAM, char **argv)
         /* If it is "flock FILE -c PROG", then -c isn't caught by getopt32:
          * we use "+" in order to support "flock -opt FILE PROG -with-opts",
          * we need to remove -c by hand.
@@ -37,35 +26,37 @@ index 05a747f..c85a25d 100644
          */
         if (argv[0]
          && argv[0][0] == '-'
-@@ -65,7 +65,10 @@ int flock_main(int argc UNUSED_PARAM, char **argv)
-            || (ENABLE_LONG_OPTS && strcmp(argv[0] + 1, "-command") == 0)
+@@ -66,6 +65,9 @@ int flock_main(int argc UNUSED_PARAM, char **argv)
             )
         ) {
--               argv++;
-+        if (argc != optind + 3)
-+            bb_error_msg_and_die("-c requires exactly one command argument");
-+        else
-+            argv++;
+                argv++;
++               if (argv[1])
++                       bb_error_msg_and_die("-c takes only one argument");
++               opt |= OPT_c;
         }
  
         if (OPT_s == LOCK_SH && OPT_x == LOCK_EX && OPT_n == LOCK_NB && OPT_u == LOCK_UN) {
-@@ -89,9 +92,14 @@ int flock_main(int argc UNUSED_PARAM, char **argv)
-                        return EXIT_FAILURE;
+@@ -90,8 +92,21 @@ int flock_main(int argc UNUSED_PARAM, char **argv)
                 bb_perror_nomsg_and_die();
         }
--
+ 
 -       if (argv[0])
--               return spawn_and_wait(argv);
--
-+    if (argv[0]) {
-+        cmd_args[0] = getenv("SHELL");
-+        if (!cmd_args[0])
-+            cmd_args[0] = (char*)DEFAULT_SHELL;
-+        cmd_args[1] = (char*)"-c";
-+        cmd_args[2] = argv[0];
-+        cmd_args[3] = NULL;
-+        return spawn_and_wait(cmd_args);
-+    }
++       if (argv[0]) {
++               if (!(opt & OPT_c)) {
++                       int rc = spawn_and_wait(argv);
++                       if (rc < 0)
++                               bb_simple_perror_msg(argv[0]);
++                       return rc;
++               }
++               /* -c 'PROG ARGS' means "run sh -c 'PROG ARGS'" */
++               argv -= 2;
++               argv[0] = (char*)get_shell_name();
++               argv[1] = (char*)"-c";
++               /* argv[2] = "PROG ARGS"; */
++               /* argv[3] = NULL; */
+                return spawn_and_wait(argv);
++       }
+ 
         return EXIT_SUCCESS;
  }
 --