Adding upstream version 1:4.13+dfsg1.upstream/1%4.13+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/lib/spawn.c b/lib/spawn.c
new file mode 100644
index 0000000..ce1a97d
--- /dev/null
+++ b/lib/spawn.c
@@ -0,0 +1,63 @@
+/*
+ * SPDX-FileCopyrightText: 2011       , Jonathan Nieder
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include "exitcodes.h"
+#include "prototypes.h"
+
+#include "shadowlog_internal.h"
+
+int run_command (const char *cmd, const char *argv[],
+                 /*@null@*/const char *envp[], /*@out@*/int *status)
+{
+	pid_t pid, wpid;
+
+	if (NULL == envp) {
+		envp = (const char **)environ;
+	}
+
+	(void) fflush (stdout);
+	(void) fflush (shadow_logfd);
+
+	pid = fork ();
+	if (0 == pid) {
+		(void) execve (cmd, (char * const *) argv,
+		               (char * const *) envp);
+		if (ENOENT == errno) {
+			exit (E_CMD_NOTFOUND);
+		}
+		fprintf (shadow_logfd, "%s: cannot execute %s: %s\n",
+		         shadow_progname, cmd, strerror (errno));
+		exit (E_CMD_NOEXEC);
+	} else if ((pid_t)-1 == pid) {
+		fprintf (shadow_logfd, "%s: cannot execute %s: %s\n",
+		         shadow_progname, cmd, strerror (errno));
+		return -1;
+	}
+
+	do {
+		wpid = waitpid (pid, status, 0);
+		if ((pid_t)-1 == wpid && errno == ECHILD)
+			break;
+	} while (   ((pid_t)-1 == wpid && errno == EINTR)
+	         || ((pid_t)-1 != wpid && wpid != pid));
+
+	if ((pid_t)-1 == wpid) {
+		fprintf (shadow_logfd, "%s: waitpid (status: %d): %s\n",
+		         shadow_progname, *status, strerror (errno));
+		return -1;
+	}
+
+	return 0;
+}
+