Reorg unistd dir

1 files changed, 51 insertions, 0 deletions

diff --git a/libc/unistd/execl.c b/libc/unistd/execl.c
new file mode 100644
index 000000000..531c2ee60
--- /dev/null
+++ b/libc/unistd/execl.c
@@ -0,0 +1,51 @@
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdarg.h>
+
+extern char **environ;
+
+int execl(__const char *path, __const char *arg, ...)
+{
+	const char *shortargv[16];
+	const char **argv;
+	const char *c;
+	int i;
+	va_list args;
+
+	i = 1;
+
+	va_start(args, arg);
+
+	do {
+		c = va_arg(args, const char *);
+
+		i++;
+	} while (c);
+
+	va_end(args);
+
+	if (i <= 16)
+		argv = shortargv;
+	else {
+		argv = (const char **) malloc(sizeof(char *) * i);
+	}
+
+	argv[0] = arg;
+	i = 1;
+
+	va_start(args, arg);
+
+	do {
+		argv[i] = va_arg(args, const char *);
+	} while (argv[i++]);
+
+	va_end(args);
+
+	i = execve(path, (char *const *) argv, environ);
+
+	if (argv != shortargv)
+		free(argv);
+
+	return i;
+}