From 42dda89dcb0407f6799dbfd0b9dab1529666ad51 Mon Sep 17 00:00:00 2001
From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Fri, 11 Dec 2020 15:23:05 -0300
Subject: posix: Fix return value of system if shell can not be executed [BZ
 #27053]

POSIX states that system returned code for failure to execute the shell
shall be as if the shell had terminated using _exit(127).  This
behaviour was removed with 5fb7fc96350575.

Checked on x86_64-linux-gnu.
---
 sysdeps/posix/system.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'sysdeps')

diff --git a/sysdeps/posix/system.c b/sysdeps/posix/system.c
index e53ec5f..13c0662 100644
--- a/sysdeps/posix/system.c
+++ b/sysdeps/posix/system.c
@@ -175,6 +175,10 @@ do_system (const char *line)
       __libc_cleanup_region_end (0);
 #endif
     }
+  else
+   /* POSIX states that failure to execute the shell should return
+      as if the shell had terminated using _exit(127).  */
+   status = W_EXITCODE (127, 0);
 
   DO_LOCK ();
   if (SUB_REF () == 0)
-- 
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