ccan: update show callback to take explicit length.

[ccan] / ccan / opt / usage.c

diff --git a/ccan/opt/usage.c b/ccan/opt/usage.c
index 4ed279197fe808ac391d39a93df1dbb9e8b14126..e96298382c3d018f16b55281115ceace40164939 100644 (file)
--- a/ccan/opt/usage.c
+++ b/ccan/opt/usage.c
@@ -20,6 +20,9 @@ const char opt_hidden[1];
 #define MIN_DESC_WIDTH 40
 #define MIN_TOTAL_WIDTH 50
 
+/* Maximum length of arg to show in opt_usage */
+#define OPT_SHOW_LEN 80
+
 static unsigned int get_columns(void)
 {
        int ws_col = 0;
@@ -148,7 +151,7 @@ static char *add_desc(char *base, size_t *len, size_t *max,
        if (opt->show) {
                char buf[OPT_SHOW_LEN + sizeof("...")];
                strcpy(buf + OPT_SHOW_LEN, "...");
-               opt->show(buf, opt->u.arg);
+               opt->show(buf, OPT_SHOW_LEN, opt->u.arg);
 
                /* If it doesn't fit on this line, indent. */
                if (off + strlen(" (default: ") + strlen(buf) + strlen(")")