[PATCH] all: set /proc/self/comm to the program name in the single binary

[Collin Funk]

From: Yu Watanabe <watanabe.yu+git...@gmail.com>

When built with --enable-single-binary=symlinks, the process name
(comm) previously contained the path component. Use prog_name instead of
argv[0] to set the correct process name without the path.

    Before:
    $ src/sleep 10000 &
    [1] 601333
    $ cat /proc/601333/comm
    src/sleep

    After:
    $ src/sleep 10000 &
    [1] 618100
    $ cat /proc/618100/comm
    sleep

* src/coreutils.c (launch_program): Use the program name instead of
argv[0] when calling prctl (PR_SET_NAME, ...).

Link: https://github.com/coreutils/coreutils/pull/382
---
 src/coreutils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/coreutils.c b/src/coreutils.c
index 180bfd9ce..ab52ba17b 100644
--- a/src/coreutils.c
+++ b/src/coreutils.c
@@ -114,7 +114,7 @@ launch_program (char const *prog_name, int prog_argc, char 
**prog_argv)
 
 #if HAVE_PRCTL && defined PR_SET_NAME
   /* Not being able to set the program name is not a fatal error.  */
-  prctl (PR_SET_NAME, prog_argv[0]);
+  prctl (PR_SET_NAME, prog_name);
 #endif
 #if HAVE_PRCTL && defined PR_SET_MM_ARG_START
   /* Shift the beginning of the command line to prog_argv[0] (if set) so
-- 
2.56.0