migrate to gitlab

1 files changed, 105 insertions, 0 deletions

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..61b55f3
--- /dev/null
+++ b/main.c
@@ -0,0 +1,105 @@
+/*
+ * UNG's Not GNU
+ *
+ * Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "sh.h"
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <libgen.h>
+#include <unistd.h>
+
+int sh_main(int argc, char *argv[])
+{
+	enum { STDIN, INTERACTIVE, COMMAND } mode = STDIN;
+	int c;
+	while ((c = getopt(argc, argv, "abCefhimnuvxo:cs")) != -1) {
+		switch (c) {
+		case 'a':	/** export all variables **/
+		case 'b':	/** notify of background job completions **/
+		case 'C':	/** don't clobber existing files with > **/
+		case 'e':	/** exit on failure **/
+		case 'f':	/** disable pathname expansion **/
+		case 'h':	/** hash utilities in functions when defined **/
+		case 'n':	/** read commands but don't execute **/
+		case 'u':	/** don't expand unset parameters **/
+		case 'v':	/** echo input to /stderr/ **/
+		case 'x':	/** enable tracing **/
+			sh_set(c, 1);
+			break;
+
+		case 'o':	/** enable [option] **/
+			sh_seto(optarg, 1);
+			break;
+
+		case 'c':	/** execute [command_string] and return **/
+			mode = COMMAND;
+			break;
+
+		case 'i':	/** run an interactive shell **/
+			mode = INTERACTIVE;
+			break;
+
+		case 's':	/** read commands from /stdin/ **/
+			mode = STDIN;
+			break;
+
+		default:
+			return 1;
+		}
+	}
+
+	while (argv[optind] && argv[optind][0] == '+') {
+		/* consume these */
+		optind++;
+	}
+
+	if (mode == COMMAND) {
+		/* shift argv */
+		execvp(argv[optind], argv + optind);
+		fprintf(stderr, "sh: %s: %s\n", argv[optind], strerror(errno));
+		return 1;
+	}
+
+	if (argv[optind] == NULL && isatty(STDIN_FILENO) && isatty(STDERR_FILENO)) {
+		mode = INTERACTIVE;
+	}
+
+	sh_init(mode == INTERACTIVE);
+
+	/* set $1-$# */
+
+	if (mode == INTERACTIVE) {
+		return sh_interactive();
+	}
+
+	/* mode is STDIN */
+	return yyparse();
+}
+
+int main(int argc, char *argv[])
+{
+	putenv("PS1=$ ");
+	char *base = basename(argv[0]);
+	if (sh_is_regular_builtin(base)) {
+		return sh_builtin(argc, argv);
+	}
+	
+	return sh_main(argc, argv);
+}