add error message printing to getopt_long and make related improvements

some related changes are also made to getopt, and the return value of
getopt_long in the case of missing arguments is fixed.

diff --git a/src/misc/getopt.c b/src/misc/getopt.c
index 9db5eaa..9217983 100644 (file)
--- a/src/misc/getopt.c
+++ b/src/misc/getopt.c
@@ -12,7 +12,7 @@ int optind=1, opterr=1, optopt, __optpos, __optreset=0;
 #define optpos __optpos
 weak_alias(__optreset, optreset);
 
-void __getopt_msg(const char *a, const char *b, const char *c, int l)
+void __getopt_msg(const char *a, const char *b, const char *c, size_t l)
 {
        FILE *f = stderr;
        b = __lctrans_cur(b);
@@ -80,7 +80,7 @@ int getopt(int argc, char * const argv[], const char *optstring)
 
        if (d != c) {
                if (optstring[0] != ':' && opterr)
-                       __getopt_msg(argv[0], ": illegal option: ", optchar, k);
+                       __getopt_msg(argv[0], ": unrecognized option: ", optchar, k);
                return '?';
        }
        if (optstring[i] == ':') {

diff --git a/src/misc/getopt_long.c b/src/misc/getopt_long.c
index df2083b..45992f8 100644 (file)
--- a/src/misc/getopt_long.c
+++ b/src/misc/getopt_long.c
@@ -2,6 +2,7 @@
 #include <stddef.h>
 #include <getopt.h>
 #include <stdio.h>
+#include <string.h>
 
 extern int __optpos, __optreset;
 
@@ -15,11 +16,14 @@ static void permute(char *const *argv, int dest, int src)
        av[dest] = tmp;
 }
 
+void __getopt_msg(const char *, const char *, const char *, size_t);
+
 static int __getopt_long_core(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly);
 
 static int __getopt_long(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly)
 {
        int ret, skipped, resumed;
+       const char *optstring2 = optstring + 1;
        if (!optind || __optreset) {
                __optreset = 0;
                __optpos = 0;
@@ -34,9 +38,10 @@ static int __getopt_long(int argc, char *const *argv, const char *optstring, con
                        if (argv[i][0] == '-' && argv[i][1]) break;
                }
                optind = i;
+               optstring2 = optstring;
        }
        resumed = optind;
-       ret = __getopt_long_core(argc, argv, optstring, longopts, idx, longonly);
+       ret = __getopt_long_core(argc, argv, optstring2, longopts, idx, longonly);
        if (resumed > skipped) {
                int i, cnt = optind-resumed;
                for (i=0; i<cnt; i++)
@@ -72,12 +77,27 @@ static int __getopt_long_core(int argc, char *const *argv, const char *optstring
                        i = match;
                        optind++;
                        if (*opt == '=') {
-                               if (!longopts[i].has_arg) return '?';
+                               if (!longopts[i].has_arg) {
+                                       if (optstring[0] == ':' || !opterr)
+                                               return '?';
+                                       __getopt_msg(argv[0],
+                                               ": option does not take an argument: ",
+                                               longopts[i].name,
+                                               strlen(longopts[i].name));
+                                       return '?';
+                               }
                                optarg = opt+1;
                        } else {
                                if (longopts[i].has_arg == required_argument) {
-                                       if (!(optarg = argv[optind]))
-                                               return ':';
+                                       if (!(optarg = argv[optind])) {
+                                               if (optstring[0] == ':' || !opterr)
+                                                       return ':';
+                                               __getopt_msg(argv[0],
+                                                       ": option requires an argument: ",
+                                                       longopts[i].name,
+                                                       strlen(longopts[i].name));
+                                               return '?';
+                                       }
                                        optind++;
                                } else optarg = NULL;
                        }
@@ -89,6 +109,12 @@ static int __getopt_long_core(int argc, char *const *argv, const char *optstring
                        return longopts[i].val;
                }
                if (argv[optind][1] == '-') {
+                       if (optstring[0] != ':' && opterr)
+                               __getopt_msg(argv[0], cnt ?
+                                       ": option is ambiguous: " :
+                                       ": unrecognized option: ",
+                                       argv[optind]+2,
+                                       strlen(argv[optind]+2));
                        optind++;
                        return '?';
                }