ESH

Add --help and --version options

Diffstat

1 files changed, 34 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
index 84a0f12..789bdf7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -35,6 +35,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
 #include "parse.h"
 
 #include "lib/error.h"
+#include "lib/optget.h"
 
 #include <errno.h>
 #include <setjmp.h>
@@ -45,6 +46,12 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
 #include <stdio.h>
 #include <stdlib.h>
 
+static struct lop lops[] = {
+	{ "help",    ARG_NUL, 256 },
+	{ "version", ARG_NUL, 257 },
+	{ NULL, 0, 0 }
+};
+
 int _loop = 1, _ret;
 
 static jmp_buf jmp;
@@ -52,7 +59,17 @@ static sig_atomic_t jmpflag = false;
 
 static void reset(int signo);
 
+static void hlp(void);
+static void ver(void);
+
 int main(int ac, char *av[]) { (void)(ac); A0 = av[0];
+	struct opt opt = OPTGET_INIT; opt.str = ""; opt.lops = lops;
+	for (int o; (o = optget(&opt, av, 1)) != -1;) switch (o) {
+	case 256: { hlp(); return 0; }
+	case 257: { ver(); return 0; }
+	default: { return 1; }
+	}
+	
 	signal(SIGINT, &reset); signal(SIGTSTP, SIG_IGN); signal(SIGQUIT, SIG_IGN);
 	if (errno) { warn("%s", serr()); }
 
@@ -78,3 +95,20 @@ int main(int ac, char *av[]) { (void)(ac); A0 = av[0];
 static void reset(int signo) { (void)(signo);
 	if (jmpflag) { siglongjmp(jmp, 1); }
 }
+
+static void hlp(void) {
+	puts("ESH - Executive Shell\n");
+	puts("Usage: esh\n");
+	puts("Options:");
+	puts("  --help     Display help information");
+	puts("  --version  Display version information");
+	return;
+}
+
+static void ver(void) {
+	puts("ESH, version " PROJECT_VERSION);
+	puts("Copyright (C) 2020, Jakob Wakeling");
+	puts("All rights reserved.");
+	puts("OMKOV Permissive Licence (https://www.omkov.net/OLPE)");
+	return;
+}