From f5185881f7b01f67b5b64218804749b733f08d44 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Mon, 21 Nov 2016 22:14:33 +0200 Subject: [PATCH] cli: consider files vanishing during notmuch new non-fatal If some software other than notmuch new renames or removes files during the notmuch new scan (specifically after scandir but before indexing the file), keep going instead of bailing out. Failing to index the file is just a race condition between notmuch and the other software; the rename could happen after the notmuch new scan anyway. It's not fatal, and we'll catch the renamed files on the next scan. Add a new exit code for when files vanished, so the caller has a chance to detect the race and re-run notmuch new to recover. Reported by Paul Wise at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=843127 --- notmuch-client.h | 11 +++++++++++ notmuch-new.c | 15 ++++++++++++--- 2 files changed, 23 insertions(+), 3 deletions(-) diff --git a/notmuch-client.h b/notmuch-client.h index 9ce2aef1..793f32ec 100644 --- a/notmuch-client.h +++ b/notmuch-client.h @@ -25,6 +25,7 @@ #define _GNU_SOURCE /* for getline */ #endif #include +#include #include "compat.h" @@ -114,6 +115,16 @@ chomp_newline (char *str) str[strlen(str)-1] = '\0'; } +/* Exit status code indicating temporary failure; user is invited to + * retry. + * + * For example, file(s) in the mail store were removed or renamed + * after notmuch new scanned the directories but before indexing the + * file(s). If the file was renamed, the indexing might not be + * complete, and the user is advised to re-run notmuch new. + */ +#define NOTMUCH_EXIT_TEMPFAIL EX_TEMPFAIL + /* Exit status code indicating the requested format version is too old * (support for that version has been dropped). CLI code should use * notmuch_exit_if_unsupported_format rather than directly exiting diff --git a/notmuch-new.c b/notmuch-new.c index c55dea7b..cc680b41 100644 --- a/notmuch-new.c +++ b/notmuch-new.c @@ -53,6 +53,7 @@ typedef struct { int total_files; int processed_files; int added_messages, removed_messages, renamed_messages; + int vanished_files; struct timeval tv_start; _filename_list_t *removed_files; @@ -280,11 +281,13 @@ add_file (notmuch_database_t *notmuch, const char *filename, case NOTMUCH_STATUS_FILE_NOT_EMAIL: fprintf (stderr, "Note: Ignoring non-mail file: %s\n", filename); break; - /* Fatal issues. Don't process anymore. */ case NOTMUCH_STATUS_FILE_ERROR: + /* Someone renamed/removed the file between scandir and now. */ + state->vanished_files++; fprintf (stderr, "Unexpected error with file %s\n", filename); (void) print_status_database ("add_file", notmuch, status); - goto DONE; + break; + /* Fatal issues. Don't process anymore. */ case NOTMUCH_STATUS_READ_ONLY_DATABASE: case NOTMUCH_STATUS_XAPIAN_EXCEPTION: case NOTMUCH_STATUS_OUT_OF_MEMORY: @@ -1151,5 +1154,11 @@ notmuch_new_command (notmuch_config_t *config, int argc, char *argv[]) if (!no_hooks && !ret && !interrupted) ret = notmuch_run_hook (db_path, "post-new"); - return ret || interrupted ? EXIT_FAILURE : EXIT_SUCCESS; + if (ret || interrupted) + return EXIT_FAILURE; + + if (add_files_state.vanished_files) + return NOTMUCH_EXIT_TEMPFAIL; + + return EXIT_SUCCESS; } -- 2.26.2