skeud

commit: c1708108ad428dc66d95e2abac07ca3848ee21fb
parent cd224ae0f86b3ae35e2b79787e431667f59fccd6
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Sun,  9 Oct 2022 03:24:19 +0200

su: Add -c option

Diffstat:
M
su.c
22
++++++++++++++++++----

1 file changed, 18 insertions(+), 4 deletions(-)
diff --git a/su.c b/su.c
@@ -33,6 +33,7 @@ main(int argc, char *argv[])
 	char *username       = NULL;
 	struct passwd *pwent = NULL;
 	char *shell          = NULL;
+	char *command        = NULL;
 
 	if(geteuid() != 0)
 	{
@@ -41,10 +42,13 @@ main(int argc, char *argv[])
 	}
 
 	/* flawfinder: ignore CWE-120, CWE-20 */
-	while((c = getopt(argc, argv, ":l:s:p")) != EOF)
+	while((c = getopt(argc, argv, ":c:l:s:p")) != EOF)
 	{
 		switch(c)
 		{
+		case 'c': // command
+			command = optarg;
+			break;
 		case 'l': // login-mode
 			opt_l    = true;
 			username = optarg;
@@ -184,9 +188,19 @@ main(int argc, char *argv[])
 
 	setenv("SHELL", shell, 1);
 
-	errno = 0;
-	/* flawfinder: ignore CWE-78 */
-	if(execlp(shell, shell, NULL) < 0)
+	errno   = 0;
+	int ret = 0;
+	if(command != NULL)
+	{
+		/* flawfinder: ignore CWE-78 */
+		ret = execlp(shell, shell, "-c", command, NULL);
+	}
+	else
+	{
+		/* flawfinder: ignore CWE-78 */
+		ret = execlp(shell, shell, NULL);
+	}
+	if(ret < 0)
 	{
 		if(errno == ENOENT)
 		{