* libc/stdlib/getopt.c (getopt_internal): Align handling of colon to

	SUSv4 requirements.
	(__getopt_long_r): Fix formatting.

1 files changed, 27 insertions, 5 deletions

diff --git a/newlib/libc/stdlib/getopt.c b/newlib/libc/stdlib/getopt.c
index 944214d..2bea694 100644
--- a/newlib/libc/stdlib/getopt.c
+++ b/newlib/libc/stdlib/getopt.c
@@ -71,6 +71,14 @@ The special argument `--' forces an end of option-scanning regardless of the
 value of ordering.  In the case of RETURN_IN_ORDER, only `--' can cause
 getopt() and friends to return EOF with optind != argc.
 
+2012-08-26: Tried to make the error handling more sus4-like. The functions
+return a colon if getopt() and friends detect a missing argument and the
+first character of shortopts/optstring starts with a colon (`:'). If getopt()
+and friends detect a missing argument and shortopts/optstring does not start
+with a colon, the function returns a question mark (`?'). If it was a missing
+argument to a short option, optopt is set to the character in question. The
+colon goes after the ordering character (`+' or `-').
+
 COPYRIGHT NOTICE AND DISCLAIMER:
 
 Copyright (C) 1997 Gregory Pietsch
@@ -185,6 +193,7 @@ getopt_internal (int argc, char *const argv[], const char *shortopts,
   int has_arg = -1;
   char *cp = 0;
   int arg_next = 0;
+  int initial_colon = 0;
 
   /* first, deal with silly parameters and easy stuff */
   if (argc == 0 || argv == 0 || (shortopts == 0 && longopts == 0)
@@ -209,6 +218,13 @@ getopt_internal (int argc, char *const argv[], const char *shortopts,
   else
     ordering = (getenv ("POSIXLY_CORRECT") != 0) ? REQUIRE_ORDER : PERMUTE;
 
+  /* check for initial colon in shortopts */
+  if (shortopts != 0 && *shortopts == ':')
+    {
+      ++shortopts;
+      initial_colon = 1;
+    }
+
   /*
    * based on ordering, find our next option, if we're at the beginning of
    * one
@@ -359,12 +375,18 @@ getopt_internal (int argc, char *const argv[], const char *shortopts,
 	    {
 	      fprintf (stderr, "%s: argument required for option `", argv[0]);
 	      if (longopt_match >= 0)
-		fprintf (stderr, "--%s'\n", longopts[longopt_match].name);
+		{
+		  fprintf (stderr, "--%s'\n", longopts[longopt_match].name);
+		  data->optopt = initial_colon ? ':' : '\?';
+		}
 	      else
-		fprintf (stderr, "-%c'\n", *cp);
+		{
+		  fprintf (stderr, "-%c'\n", *cp);
+		  data->optopt = *cp;
+		}
 	    }
 	  data->optind++;
-	  return (data->optopt = ':');
+	  return initial_colon ? ':' : '\?';
 	}
       else
 	{
@@ -460,8 +482,8 @@ __getopt_r (int argc, char *const argv[], const char *optstring,
 
 int
 __getopt_long_r (int argc, char *const argv[], const char *shortopts,
-	         const struct option *longopts, int *longind,
-	         struct getopt_data *data)
+		 const struct option *longopts, int *longind,
+		 struct getopt_data *data)
 {
   return getopt_internal (argc, argv, shortopts, longopts, longind, 0, data);
 }