opt: fix up outdated comments in documentation.

[ccan] / ccan / opt / usage.c

diff --git a/ccan/opt/usage.c b/ccan/opt/usage.c
index eedaae7eb821d0dab8114de49222b14496887aa0..873ee5db1856cf0bf326a8ed4ba9f19aa22c2db6 100644 (file)
--- a/ccan/opt/usage.c
+++ b/ccan/opt/usage.c
@@ -1,3 +1,4 @@
+/* Licensed under GPLv3+ - see LICENSE file for details */
 #include <ccan/opt/opt.h>
 #include <string.h>
 #include <stdlib.h>
@@ -32,8 +33,8 @@ char *opt_usage(const char *argv0, const char *extra)
                extra = "";
                for (i = 0; i < opt_count; i++) {
                        if (opt_table[i].cb == (void *)opt_usage_and_exit
-                           && opt_table[i].arg) {
-                               extra = opt_table[i].arg;
+                           && opt_table[i].u.carg) {
+                               extra = opt_table[i].u.carg;
                                break;
                        }
                }
@@ -62,9 +63,6 @@ char *opt_usage(const char *argv0, const char *extra)
        }
 
        p = ret = malloc(len);
-       if (!ret)
-               return NULL;
-
        p += sprintf(p, "Usage: %s", argv0);
        p += sprintf(p, " [-");
        num = write_short_options(p);
@@ -93,14 +91,14 @@ char *opt_usage(const char *argv0, const char *extra)
                        len += sprintf(p + len, " <arg>");
                len += sprintf(p + len, "%.*s",
                               len < strlen(OPT_SPACE_PAD)
-                              ? strlen(OPT_SPACE_PAD) - len : 1,
+                              ? (unsigned)strlen(OPT_SPACE_PAD) - len : 1,
                               OPT_SPACE_PAD);
 
                len += sprintf(p + len, "%s", opt_table[i].desc);
                if (opt_table[i].show) {
                        char buf[OPT_SHOW_LEN + sizeof("...")];
                        strcpy(buf + OPT_SHOW_LEN, "...");
-                       opt_table[i].show(buf, opt_table[i].arg);
+                       opt_table[i].show(buf, opt_table[i].u.arg);
                        len += sprintf(p + len, " (default: %s)", buf);
                }
                p += len;