1 files changed, 90 insertions, 5 deletions
diff --git a/src/c_bsdsetsid.c b/src/c_bsdsetsid.c
index 28099f3..2452553 100644
--- a/src/c_bsdsetsid.c
+++ b/src/c_bsdsetsid.c
@@ -39,20 +39,105 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * bsdsetsid: src/c_bsdsetsid.c
- * Wed Nov 25 22:16:26 CET 2020
+ * Wed Nov 25 22:31:26 CET 2020
  * Joe
  *
  * This is the entrypoint of the program.
  */
 
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "c_bsdsetsid.h"
+
+static char
+c_args
+(int			argc,
+ const char*	argv[],
+ const char*	envp[],
+ bool_t*		wopt)
+{
+	(void)envp;
+	if (argc == 1) {
+		dprintf(
+			STDERR_FILENO,
+			"%s: %s\n",
+			C_PROGNAME,
+			C_ERR_NOARG
+			);
+		return (1);
+	}
+	if (strncmp(argv[1], C_W_OPT, 3) == 0) {
+		*wopt = TRUE;
+		if (argc == 2) {
+			dprintf(
+				STDERR_FILENO,
+				"%s: %s\n",
+				C_PROGNAME,
+				C_ERR_NOARG
+				);
+			return (1);
+		}
+	}
+	return (0);
+}
+
 int
 main
 (int			argc,
  const char*	argv[],
  const char*	envp[])
 {
-	(void)argc;
-	(void)argv;
-	(void)envp;
-	return (0);
+	int sets_ret;
+	int exec_ret;
+	pid_t pid;
+	bool_t wopt;
+
+	wopt = FALSE;
+	if (c_args(argc, argv, envp, &wopt) != 0) {
+		return (EXIT_FAILURE);
+	}
+	pid = fork();
+	if (pid == -1) {
+		dprintf(
+			STDERR_FILENO,
+			"%s: fork: %s\n",
+			C_PROGNAME,
+			strerror(errno)
+			);
+		return (EXIT_FAILURE);
+	}
+	else if (pid == 0) {
+		sets_ret = setsid();
+		if (sets_ret == -1) {
+			dprintf(
+				STDERR_FILENO,
+				"%s: setsid: %s\n",
+				C_PROGNAME,
+				strerror(errno)
+				);
+			return (EXIT_FAILURE);
+		}
+		exec_ret = execve(
+			argv[1 + wopt],
+			(char* const*)argv + (1 + wopt),
+			(char* const*)envp
+			);
+		if (exec_ret == -1) {
+			dprintf(
+				STDERR_FILENO,
+				"%s: execve: %s\n",
+				C_PROGNAME,
+				strerror(errno)
+				);
+			return (EXIT_FAILURE);
+		}
+	}
+	else {
+		return (EXIT_SUCCESS);
+	}
+	return (EXIT_SUCCESS);
 }