lsfd: add --debug-filter option

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

diff --git a/misc-utils/lsfd.1.adoc b/misc-utils/lsfd.1.adoc
index ff441cbffad1b0cc3f2d3ff2153f9245335c9a65..a81befc8c3d9f8d29404ad9939128c31154a8fca 100644 (file)
--- a/misc-utils/lsfd.1.adoc
+++ b/misc-utils/lsfd.1.adoc
@@ -60,6 +60,10 @@ Don't truncate text in columns.
 *-Q*, *--filter* _expr_::
 Print the files only satisfying with the condition represented by the _expr_.
 
+*--debug-filter*::
+Dump the internal data structure for the filter and exit. This is useful
+only for lsfd developers.
+
 *-h*, *--help*::
 Display help text and exit.
 

diff --git a/misc-utils/lsfd.c b/misc-utils/lsfd.c
index 02570b08c4f8ac83756943ecae6bc59bdb20e476..8c703d411ed48cd5468bf4c283504dd729d6f09f 100644 (file)
--- a/misc-utils/lsfd.c
+++ b/misc-utils/lsfd.c
@@ -962,6 +962,7 @@ static void __attribute__((__noreturn__)) usage(void)
        fputs(_(" -u, --notruncate      don't truncate text in columns\n"), out);
        fputs(_(" -Q, --filter <expr>   apply display filter\n"), out);
        fputs(_("     --source <source> add filter by SOURCE\n"), out);
+       fputs(_("     --debug-filter    dump the innternal data structure of filter and exit\n"), out);
 
        fputs(USAGE_SEPARATOR, out);
        printf(USAGE_HELP_OPTIONS(23));
@@ -1036,10 +1037,12 @@ int main(int argc, char *argv[])
        char *outarg = NULL;
        struct lsfd_control ctl = {};
        char  *filter_expr = NULL;
+       bool debug_filter = false;
 
        enum {
                OPT_SYSROOT = CHAR_MAX + 1,
                OPT_SOURCE,
+               OPT_DEBUG_FILTER,
        };
        static const struct option longopts[] = {
                { "noheadings", no_argument, NULL, 'n' },
@@ -1053,6 +1056,7 @@ int main(int argc, char *argv[])
                { "sysroot",    required_argument, NULL, OPT_SYSROOT },
                { "filter",     required_argument, NULL, 'Q' },
                { "source",     required_argument, NULL, OPT_SOURCE },
+               { "debug-filter",no_argument, NULL, OPT_DEBUG_FILTER },
                { NULL, 0, NULL, 0 },
        };
 
@@ -1098,7 +1102,9 @@ int main(int argc, char *argv[])
                        free(quoted_source);
                        break;
                }
-
+               case OPT_DEBUG_FILTER:
+                       debug_filter = true;
+                       break;
                case 'V':
                        print_version(EXIT_SUCCESS);
                case 'h':
@@ -1161,6 +1167,10 @@ int main(int argc, char *argv[])
                const char *errmsg = lsfd_filter_get_errmsg(ctl.filter);
                if (errmsg)
                        errx(EXIT_FAILURE, "%s", errmsg);
+               if (debug_filter) {
+                       lsfd_filter_dump(ctl.filter, stdout);
+                       return 0;
+               }
                free(filter_expr);
        }