doveadm fetch: If invalid fetch field is given, print list of available fields.

--HG--
branch : HEAD

diff --git a/src/doveadm/doveadm-mail-fetch.c b/src/doveadm/doveadm-mail-fetch.c
index 62c0704791861778a23cd3d7fa07695af5b7e603..1e4d39b60c2da0b04ea996d81221d2c0857d772f 100644 (file)
--- a/src/doveadm/doveadm-mail-fetch.c
+++ b/src/doveadm/doveadm-mail-fetch.c
@@ -16,6 +16,8 @@
 #include "doveadm-mail.h"
 #include "doveadm-mail-list-iter.h"
 
+#include <stdio.h>
+
 struct fetch_context {
        struct mail_search_args *search_args;
        struct ostream *output;
@@ -248,6 +250,16 @@ static const struct fetch_field *fetch_field_find(const char *name)
        return NULL;
 }
 
+static void print_fetch_fields(void)
+{
+       unsigned int i;
+
+       fprintf(stderr, "Available fetch fields: %s", fetch_fields[0].name);
+       for (i = 1; i < N_ELEMENTS(fetch_fields); i++)
+               fprintf(stderr, " %s", fetch_fields[i].name);
+       fprintf(stderr, "\n");
+}
+
 static void parse_fetch_fields(struct fetch_context *ctx, const char *str)
 {
        const char *const *fields, *name;
@@ -259,8 +271,10 @@ static void parse_fetch_fields(struct fetch_context *ctx, const char *str)
                name = t_str_lcase(*fields);
 
                field = fetch_field_find(name);
-               if (field == NULL)
+               if (field == NULL) {
+                       print_fetch_fields();
                        i_fatal("Unknown fetch field: %s", name);
+               }
                ctx->wanted_fields |= field->wanted_fields;
 
                array_append(&ctx->fields, field, 1);