Implement nopen(1)

1 files changed, 43 insertions, 0 deletions

diff --git a/spawn.c b/spawn.c
new file mode 100644
index 0000000..614ab64
--- /dev/null
+++ b/spawn.c
@@ -0,0 +1,43 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include <stdarg.h>
+#include <unistd.h>
+
+#include "util.h"
+
+void
+spawnvp(char *dir, char *file, char *argv[])
+{
+	pid_t pid;
+	int status;
+
+	pid = fork();
+	if (pid == 0) {
+		if (dir != NULL)
+			chdir(dir);
+		execvp(file, argv);
+		_exit(1);
+	} else {
+		/* Ignore interruptions */
+		while (waitpid(pid, &status, 0) == -1)
+			;
+	}
+}
+
+void
+spawnlp(char *dir, char *file, char *argv0, ...)
+{
+	char *argv[NR_ARGS];
+	va_list ap;
+	int argc;
+
+	va_start(ap, argv0);
+	argv[0] = argv0;
+	for (argc = 1; argv[argc] = va_arg(ap, char *); argc++)
+		;
+	argv[argc] = NULL;
+	va_end(ap);
+	spawnvp(dir, file, argv);
+}