support: Add envp argument to support_capture_subprogram

So tests can specify a list of environment variables.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

5 files changed, 16 insertions, 12 deletions

diff --git a/support/capture_subprocess.h b/support/capture_subprocess.h
index 1ecbdfe..93b7245 100644
--- a/support/capture_subprocess.h
+++ b/support/capture_subprocess.h
@@ -35,11 +35,12 @@ struct support_capture_subprocess
 struct support_capture_subprocess support_capture_subprocess
   (void (*callback) (void *), void *closure);
 
-/* Issue FILE with ARGV arguments by using posix_spawn and capture standard
-   output, standard error, and the exit status.  The out.buffer and err.buffer
-   are handle as support_capture_subprocess.  */
+/* Issue FILE with ARGV arguments and ENVP environments by using posix_spawn
+   and capture standard output, standard error, and the exit status.  If
+   ENVP is NULL the current environment variable is used.  The out.buffer and
+   err.buffer are handle by support_capture_subprocess.  */
 struct support_capture_subprocess support_capture_subprogram
-  (const char *file, char *const argv[]);
+  (const char *file, char *const argv[], char *const envp[]);
 
 /* Copy the running program into a setgid binary and run it with CHILD_ID
    argument.  If execution is successful, return the exit status of the child
diff --git a/support/subprocess.h b/support/subprocess.h
index 8fbb895..8274a2b 100644
--- a/support/subprocess.h
+++ b/support/subprocess.h
@@ -33,10 +33,11 @@ struct support_subprocess
 struct support_subprocess support_subprocess
   (void (*callback) (void *), void *closure);
 
-/* Issue FILE with ARGV arguments by using posix_spawn and return is PID, a
-   pipe redirected to STDOUT, and a pipe redirected to STDERR.  */
+/* Issue FILE with ARGV arguments and ENVP environments by using posix_spawn
+   and return is PID, a pipe redirected to STDOUT, and a pipe redirected to
+   STDERR.  If ENVP is NULL the current environment variable is used.  */
 struct support_subprocess support_subprogram
-  (const char *file, char *const argv[]);
+  (const char *file, char *const argv[], char *const envp[]);
 
 /* Invoke program FILE with ARGV arguments by using posix_spawn and wait for it
    to complete.  Return program exit status.  */
diff --git a/support/support_capture_subprocess.c b/support/support_capture_subprocess.c
index ffced8a..5384719 100644
--- a/support/support_capture_subprocess.c
+++ b/support/support_capture_subprocess.c
@@ -93,13 +93,14 @@ support_capture_subprocess (void (*callback) (void *), void *closure)
 }
 
 struct support_capture_subprocess
-support_capture_subprogram (const char *file, char *const argv[])
+support_capture_subprogram (const char *file, char *const argv[],
+			    char *const envp[])
 {
   struct support_capture_subprocess result;
   xopen_memstream (&result.out);
   xopen_memstream (&result.err);
 
-  struct support_subprocess proc = support_subprogram (file, argv);
+  struct support_subprocess proc = support_subprogram (file, argv, envp);
 
   support_capture_poll (&result, &proc);
   return result;
diff --git a/support/support_subprocess.c b/support/support_subprocess.c
index a2fef39..b692a7f 100644
--- a/support/support_subprocess.c
+++ b/support/support_subprocess.c
@@ -69,7 +69,7 @@ support_subprocess (void (*callback) (void *), void *closure)
 }
 
 struct support_subprocess
-support_subprogram (const char *file, char *const argv[])
+support_subprogram (const char *file, char *const argv[], char *const envp[])
 {
   struct support_subprocess result = support_subprocess_init ();
 
@@ -84,7 +84,8 @@ support_subprogram (const char *file, char *const argv[])
   xposix_spawn_file_actions_addclose (&fa, result.stdout_pipe[1]);
   xposix_spawn_file_actions_addclose (&fa, result.stderr_pipe[1]);
 
-  result.pid = xposix_spawn (file, &fa, NULL, argv, environ);
+  result.pid = xposix_spawn (file, &fa, NULL, argv,
+			     envp == NULL ? environ : envp);
 
   xclose (result.stdout_pipe[1]);
   xclose (result.stderr_pipe[1]);
diff --git a/support/tst-support_capture_subprocess.c b/support/tst-support_capture_subprocess.c
index 8145548..756fb75 100644
--- a/support/tst-support_capture_subprocess.c
+++ b/support/tst-support_capture_subprocess.c
@@ -238,7 +238,7 @@ do_subprogram (const struct test *test)
   args[argc]   = NULL;
   TEST_VERIFY (argc < argv_size);
 
-  return support_capture_subprogram (args[0], args);
+  return support_capture_subprogram (args[0], args, NULL);
 }
 
 enum test_type