add --version option to uiomux tool

Author: kfish

doc/uiomux.1

@@ -16,6 +16,9 @@ uiomux \- query and manage the UIOMux state
 .B uiomux
 .RI SUBCOMMAND
 
+.PP
+\fBuiomux\fR [\-\-version ]
+
 .SH DESCRIPTION
 .B uiomux
 is a tool for querying UIO and managing the UIOMux state.
@@ -42,6 +45,14 @@ UIOMux shared state. Note that any subsequent program using UIOMux
 will reallocate and initialize this shared state, including this
 tool's 'info' and 'reset' commands.
 
+.SH OPTIONS
+.PP
+\fBuiomux\fR accepts the following options:
+
+.SS "Miscellaneous options"
+.IP "\-\-version" 10
+Output version information and exit.
+
 .SH AUTHORS
 
 uiomux was written by Conrad Parker.

src/tools/uiomux.c

@@ -62,6 +62,11 @@ usage (void)
 
   printf ("\nUtilities:\n");
   printf ("  alloc <n>   Allocate a specified number of bytes.\n");
+
+  printf ("\nOptions:\n");
+  printf ("  --version   Show uiomux version info\n");
+
+  printf ("\nPlease report bugs to <[email protected]>\n");
 }
 
 static void
@@ -132,11 +137,20 @@ destroy (void)
 int
 main (int argc, char *argv[])
 {
+  int i;
+
   if (argc < 2) {
     usage();
     exit (1);
   }
 
+  for (i=1; i<argc; i++) {
+    if (!strncmp(argv[i], "--version", 10)) {
+      version();
+      exit (0);
+    }
+  }
+
   if (!strncmp (argv[1], "query", 6)) {
     query ();
   } else if (!strncmp (argv[1], "info", 5)) {