1 files changed, 116 insertions, 0 deletions
diff --git a/src/options.c b/src/options.c
new file mode 100644
index 0000000..10f937c
--- /dev/null
+++ b/src/options.c
@@ -0,0 +1,116 @@
+/*
+ * Handle command line arguments
+ *
+ * Copyright 1999-2015 Gentoo Foundation
+ * Licensed under the GPL-2
+ */
+
+#include "headers.h"
+#include "sbutil.h"
+#include "sandbox.h"
+
+static void show_version(void)
+{
+	puts(
+		"Gentoo path sandbox\n"
+		" version: " PACKAGE_VERSION "\n"
+		" C lib:   " LIBC_VERSION " (" LIBC_PATH ")\n"
+		" build:   " __DATE__ " " __TIME__ "\n"
+		" contact: " PACKAGE_BUGREPORT " via http://bugs.gentoo.org/\n"
+		" rtld:    "
+#ifdef BROKEN_RTLD_NEXT
+			"next is broken ;(\n"
+#else
+			"next is OK! :D\n"
+#endif
+#ifndef SB_SCHIZO
+# define SB_SCHIZO "no"
+#endif
+		" schizo:  " SB_SCHIZO "\n"
+		"\nconfigured with these options:\n"
+		SANDBOX_CONFIGURE_OPTS
+	);
+	exit(0);
+}
+
+#define PARSE_FLAGS "+hV"
+#define a_argument required_argument
+static struct option const long_opts[] = {
+	{"help",          no_argument, NULL, 'h'},
+	{"version",       no_argument, NULL, 'V'},
+	{NULL,            no_argument, NULL, 0x0}
+};
+static const char * const opts_help[] = {
+	"Print this help and exit",
+	"Print version and exit",
+	NULL
+};
+
+static void show_usage(int status)
+{
+	const char a_arg[] = "<arg>";
+	size_t a_arg_len = strlen(a_arg) + 2;
+	size_t i;
+	int optlen;
+	FILE *fp = status ? stderr : stdout;
+
+	fprintf(fp,
+		"Usage: sandbox [options] [program [program args...]]\n"
+		"\n"
+		"Sandbox will start up a sandbox session and execute the specified program.\n"
+		"If no program is specified, an interactive shell is automatically launched.\n"
+		"You can use this to quickly test out sandbox behavior.\n"
+		"\n"
+		"Upon startup, initial settings are taken from these files / directories:\n"
+		"\t" SANDBOX_CONF_FILE "\n"
+		"\t" SANDBOX_CONFD_DIR "\n"
+	);
+
+	fprintf(fp, "\nOptions: -[%s]\n", PARSE_FLAGS + 1);
+	/* prescan the --long opt length to auto-align */
+	optlen = 0;
+	for (i = 0; long_opts[i].name; ++i) {
+		int l = strlen(long_opts[i].name);
+		if (long_opts[i].has_arg == a_argument)
+			l += a_arg_len;
+		optlen = MAX(l, optlen);
+	}
+
+	for (i = 0; long_opts[i].name; ++i) {
+		/* first output the short flag if it has one */
+		if (long_opts[i].val > '~' || long_opts[i].val < ' ')
+			printf("      ");
+		else
+			printf("  -%c, ", long_opts[i].val);
+
+		/* then the long flag */
+		if (long_opts[i].has_arg == no_argument)
+			printf("--%-*s", optlen, long_opts[i].name);
+		else
+			printf("--%s %s %*s", long_opts[i].name, a_arg,
+				(int)(optlen - strlen(long_opts[i].name) - a_arg_len), "");
+
+		/* finally the help text */
+		printf(" * %s\n", opts_help[i]);
+	}
+
+	fprintf(fp, "\nContact: " PACKAGE_BUGREPORT " via http://bugs.gentoo.org/\n");
+
+	exit(status);
+}
+
+void parseargs(int argc, char *argv[])
+{
+	int i;
+
+	while ((i = getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
+		switch (i) {
+		case 'V':
+			show_version();
+		case 'h':
+			show_usage(0);
+		case '?':
+			show_usage(1);
+		}
+	}
+}