Support long options.

1 files changed, 40 insertions, 1 deletions

diff --git a/sisinstall/sismain.cpp b/sisinstall/sismain.cpp
index 8420733..21d6f55 100644
--- a/sisinstall/sismain.cpp
+++ b/sisinstall/sismain.cpp
@@ -13,27 +13,65 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 
+#define _GNU_SOURCE
+#include <getopt.h>
+
 static void error(int line)
 {
 	fprintf(stderr, "Got errno = %d on line %d\n", errno, line);
 	exit(1);
 }
 
+static struct option opts[] = {
+	{ "help",     no_argument,       0, 'h' },
+	{ "version",  no_argument,       0, 'V' },
+	{ "loglevel", required_argument, 0, 'l' },
+	{ "dry-run",  no_argument,       0, 'n' },
+	{ "force",    no_argument,       0, 'f' },
+	{ NULL,       0,                 0, 0 },
+};
+
+void printHelp()
+{
+	printf(
+	_("Usage: sisinstall [OPTIONS]... SISFILE\n"
+	"\n"
+	"Supported options:\n"
+	"\n"
+	" -h, --help              Display this text.\n"
+	" -V, --version           Print version and exit.\n"
+	" -l, --loglevel=LEVEL    Set the log level, by default 0.\n"
+	" -n, --dry-run           Just parse file file.\n"
+	" -f, --force             Ignore any earlier installations.\n"
+	));
+}
+
 void main(int argc, char* argv[])
 {
 	char* filename = 0;
 	char option;
 	bool dryrun = false;
+	bool forced = false;
 
 #ifdef LC_ALL
 	setlocale(LC_ALL, "");
 #endif
 	textdomain(PACKAGE);
 
-	while ((option = getopt(argc, argv, "nl:")) != -1)
+	while (1)
 		{
+		option = getopt_long(argc, argv, "fhnl:", opts, NULL);
+		if (option == -1)
+			break;
 		switch (option)
 			{
+			case 'h':
+			case '?':
+				printHelp();
+				exit(0);
+			case 'f':
+				forced = true;
+				break;
 			case 'l':
 				logLevel = atoi(optarg);
 				break;
@@ -80,6 +118,7 @@ void main(int argc, char* argv[])
 			{
 			SISInstaller installer;
 			installer.setPsion(psion);
+			installer.setForced(forced);
 			installer.run(&sisFile, buf, len);
 			}
 		}