From 9ac2f2cf76a53348c505482f8df27ab0464006d1 Mon Sep 17 00:00:00 2001 From: Justin Pryzby Date: Mon, 30 Mar 2020 18:59:16 -0500 Subject: [PATCH v25 02/11] pg_stat_file and pg_ls_dir_* to use lstat().. pg_ls_dir_* will now skip (no longer show) symbolic links, same as other non-regular file types, as we advertize we do since 8b6d94cf6. That seems to be the intented behavior, since irregular file types are 1) less portable; and, 2) we don't currently show a file's type except for "bool is_dir". pg_stat_file will now 1) show metadata of links themselves, rather than their target; and, 2) specifically, show links to directories with "is_dir=false"; and, 3) not error on broken symlinks. --- doc/src/sgml/func.sgml | 2 +- src/backend/utils/adt/genfile.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml index 7cafdb9107..df29af6371 100644 --- a/doc/src/sgml/func.sgml +++ b/doc/src/sgml/func.sgml @@ -25897,7 +25897,7 @@ SELECT convert_from(pg_read_binary_file('file_in_utf8.txt'), 'UTF8'); Returns a record containing the file's size, last access time stamp, last modification time stamp, last file status change time stamp (Unix platforms only), file creation time stamp (Windows only), and a flag - indicating if it is a directory (or a symbolic link to a directory). + indicating if it is a directory. This function is restricted to superusers by default, but other users diff --git a/src/backend/utils/adt/genfile.c b/src/backend/utils/adt/genfile.c index d34182a7b0..9f4927220b 100644 --- a/src/backend/utils/adt/genfile.c +++ b/src/backend/utils/adt/genfile.c @@ -406,7 +406,7 @@ pg_stat_file(PG_FUNCTION_ARGS) filename = convert_and_check_filename(filename_t); - if (stat(filename, &fst) < 0) + if (lstat(filename, &fst) < 0) { if (missing_ok && errno == ENOENT) PG_RETURN_NULL(); @@ -632,7 +632,7 @@ pg_ls_dir_files(FunctionCallInfo fcinfo, const char *dir, bool missing_ok) /* Get the file info */ snprintf(path, sizeof(path), "%s/%s", dir, de->d_name); - if (stat(path, &attrib) < 0) + if (lstat(path, &attrib) < 0) { /* Ignore concurrently-deleted files, else complain */ if (errno == ENOENT) -- 2.17.0