We want to allow builds in chroots that lack /bin/sh.  Thus, system(3)
and popen(3) need to be tweaked to use the right shell.  For the bootstrap
glibc, we just use whatever `sh' can be found in $PATH.  The final glibc
instead uses the hard-coded absolute file name of `bash'.

In addition, status should be initialized to 0 and not -1.

diff --git a/libio/iopopen.c b/libio/iopopen.c
index ebc381ed7c..e0d3ed1bc3 100644
--- a/libio/iopopen.c
+++ b/libio/iopopen.c
@@ -85,7 +85,7 @@ spawn_process (posix_spawn_file_actions_t *fa, FILE *fp, const char *command,
 	return false;
     }
 
-  if (__posix_spawn (&((_IO_proc_file *) fp)->pid, _PATH_BSHELL, fa, 0,
+  if (posix_spawnp (&((_IO_proc_file *) fp)->pid, "sh", fa, 0,
 		     (char *const[]){ (char*) "sh", (char*) "-c",
 		     (char *) command, NULL }, __environ) != 0)
     return false;
diff --git a/sysdeps/posix/system.c b/sysdeps/posix/system.c
index a03f478fc7..94da6facf3 100644
--- a/sysdeps/posix/system.c
+++ b/sysdeps/posix/system.c
@@ -101,7 +101,7 @@ cancel_handler (void *arg)
 static int
 do_system (const char *line)
 {
-  int status = -1;
+  int status = 0;
   int ret;
   pid_t pid;
   struct sigaction sa;
@@ -145,7 +145,7 @@ do_system (const char *line)
   __posix_spawnattr_setflags (&spawn_attr,
 			      POSIX_SPAWN_SETSIGDEF | POSIX_SPAWN_SETSIGMASK);
 
-  ret = __posix_spawn (&pid, SHELL_PATH, 0, &spawn_attr,
+  ret = posix_spawnp (&pid, SHELL_NAME, 0, &spawn_attr,
 		       (char *const[]){ (char *) SHELL_NAME,
 					(char *) "-c",
 					(char *) line, NULL },
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<div class='path'>path: <a href='/guix/log/?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>root</a>/<a href='/guix/log/gnu?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>gnu</a>/<a href='/guix/log/gnu/packages?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>packages</a>/<a href='/guix/log/gnu/packages/patches?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>patches</a>/<a href='/guix/log/gnu/packages/patches/nginx-socket-cloexec.patch?id=5e2140511c1ad9ccd731438b74d61b62111da1e6'>nginx-socket-cloexec.patch</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/patches/nginx-socket-cloexec.patch?id=5e2140511c1ad9ccd731438b74d61b62111da1e6&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-10-14 23:41:26 +0300'>2020-10-14</span></td><td><a href='/guix/commit/gnu/packages/patches/nginx-socket-cloexec.patch?id=4b0e08beb2620336910197738df8ce1e36abda33'>gnu: Add nginx-socket-cloexec.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/nginx-socket-cloexec.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add this.
* gnu/packages/web.scm (nginx-socket-cloexec): New variable.
</span></span></td><td>Oleg Pykhalov</td></tr>