finalise 4.4.2

[chiark-utils.git] / cprogs / watershed.c

diff --git a/cprogs/watershed.c b/cprogs/watershed.c
index dfc9480b2057be7b9adc8385f5acf8eb492d63ab..580d2204515a7c367b8cbe385f8420f7b2efe4e8 100644 (file)
--- a/cprogs/watershed.c
+++ b/cprogs/watershed.c
@@ -270,6 +270,7 @@
 static const struct option os[]= {
   { "--state-dir", 1,0,'d' },
   { "--command-id",1,0,'i' },
+  { "--help",      0,0,'h' },
   { 0 }
 };
 
@@ -294,10 +295,17 @@ static int cohort_fd, lock_fd;
   }while(0)
 
 
-static void badusage(void) {
+static void printusage(FILE *f) {
   fputs(_("usage: watershed [<options>] <command>...\n"
-         "options: -d|--state-dir <directory>  -i|--command-id <id>\n"),
-         stderr);
+         "options:\n"
+         "   -d|--state-dir <directory>\n"
+         "   -i|--command-id <id>\n"
+         "   -h|--help\n"
+         "see /usr/share/doc/chiark-utils-bin/watershed.txt\n"),
+         f);
+}
+static void badusage(void) {
+  printusage(stderr);
   exit(127);
 }
 static void die(const char *m) {
@@ -329,11 +337,12 @@ static char *m_asprintf(const char *fmt, ...) {
 static void parse_args(int argc, char *const *argv) {
   int o;
   for (;;) {
-    o= getopt_long(argc, argv, "+d:i:", os,0);
+    o= getopt_long(argc, argv, "+d:i:h", os,0);
     if (o==-1) break;
     switch (o) {
     case 'd': state_dir= optarg; break;
     case 'i': command_id= optarg; break;
+    case 'h': printusage(stdout); exit(0); break;
     default: badusage();
     }
   }