#include "access/xlog.h"
#include "catalog/pg_tablespace.h"
#include "common/file_perm.h"
+#include "common/file_utils.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "portability/mem.h"
while ((de = ReadDirExtended(dir, path, elevel)) != NULL)
{
char subpath[MAXPGPATH * 2];
- struct stat fst;
- int sret;
CHECK_FOR_INTERRUPTS();
snprintf(subpath, sizeof(subpath), "%s/%s", path, de->d_name);
- if (process_symlinks)
- sret = stat(subpath, &fst);
- else
- sret = lstat(subpath, &fst);
-
- if (sret < 0)
+ switch (get_dirent_type(subpath, de, process_symlinks, elevel))
{
- ereport(elevel,
- (errcode_for_file_access(),
- errmsg("could not stat file \"%s\": %m", subpath)));
- continue;
- }
+ case PGFILETYPE_REG:
+ (*action) (subpath, false, elevel);
+ break;
+ case PGFILETYPE_DIR:
+ walkdir(subpath, action, false, elevel);
+ break;
+ default:
- if (S_ISREG(fst.st_mode))
- (*action) (subpath, false, elevel);
- else if (S_ISDIR(fst.st_mode))
- walkdir(subpath, action, false, elevel);
+ /*
+ * Errors are already reported directly by get_dirent_type(),
+ * and any remaining symlinks and unknown file types are
+ * ignored.
+ */
+ break;
+ }
}
FreeDir(dir); /* we ignore any error here */
*/
#ifndef FRONTEND
-#error "This file is not expected to be compiled for backend code"
-#endif
-
+#include "postgres.h"
+#else
#include "postgres_fe.h"
+#endif
#include <dirent.h>
#include <fcntl.h>
#include <unistd.h>
#include "common/file_utils.h"
+#ifdef FRONTEND
#include "common/logging.h"
+#endif
+#ifdef FRONTEND
/* Define PG_FLUSH_DATA_WORKS if we have an implementation for pg_flush_data */
#if defined(HAVE_SYNC_FILE_RANGE)
while (errno = 0, (de = readdir(dir)) != NULL)
{
char subpath[MAXPGPATH * 2];
- struct stat fst;
- int sret;
if (strcmp(de->d_name, ".") == 0 ||
strcmp(de->d_name, "..") == 0)
snprintf(subpath, sizeof(subpath), "%s/%s", path, de->d_name);
- if (process_symlinks)
- sret = stat(subpath, &fst);
- else
- sret = lstat(subpath, &fst);
-
- if (sret < 0)
+ switch (get_dirent_type(subpath, de, process_symlinks, PG_LOG_ERROR))
{
- pg_log_error("could not stat file \"%s\": %m", subpath);
- continue;
+ case PGFILETYPE_REG:
+ (*action) (subpath, false);
+ break;
+ case PGFILETYPE_DIR:
+ walkdir(subpath, action, false);
+ break;
+ default:
+
+ /*
+ * Errors are already reported directly by get_dirent_type(),
+ * and any remaining symlinks and unknown file types are
+ * ignored.
+ */
+ break;
}
-
- if (S_ISREG(fst.st_mode))
- (*action) (subpath, false);
- else if (S_ISDIR(fst.st_mode))
- walkdir(subpath, action, false);
}
if (errno)
return 0;
}
+
+#endif /* FRONTEND */
+
+/*
+ * Return the type of a directory entry.
+ *
+ * In frontend code, elevel should be a level from logging.h; in backend code
+ * it should be a level from elog.h.
+ */
+PGFileType
+get_dirent_type(const char *path,
+ const struct dirent *de,
+ bool look_through_symlinks,
+ int elevel)
+{
+ PGFileType result;
+
+ /*
+ * Some systems tell us the type directly in the dirent struct, but that's
+ * a BSD and Linux extension not required by POSIX. Even when the
+ * interface is present, sometimes the type is unknown, depending on the
+ * filesystem.
+ */
+#if defined(DT_REG) && defined(DT_DIR) && defined(DT_LNK)
+ if (de->d_type == DT_REG)
+ result = PGFILETYPE_REG;
+ else if (de->d_type == DT_DIR)
+ result = PGFILETYPE_DIR;
+ else if (de->d_type == DT_LNK && !look_through_symlinks)
+ result = PGFILETYPE_LNK;
+ else
+ result = PGFILETYPE_UNKNOWN;
+#else
+ result = PGFILETYPE_UNKNOWN;
+#endif
+
+ if (result == PGFILETYPE_UNKNOWN)
+ {
+ struct stat fst;
+ int sret;
+
+
+ if (look_through_symlinks)
+ sret = stat(path, &fst);
+ else
+ sret = lstat(path, &fst);
+
+ if (sret < 0)
+ {
+ result = PGFILETYPE_ERROR;
+#ifdef FRONTEND
+ pg_log_generic(elevel, "could not stat file \"%s\": %m", path);
+#else
+ ereport(elevel,
+ (errcode_for_file_access(),
+ errmsg("could not stat file \"%s\": %m", path)));
+#endif
+ }
+ else if (S_ISREG(fst.st_mode))
+ result = PGFILETYPE_REG;
+ else if (S_ISDIR(fst.st_mode))
+ result = PGFILETYPE_DIR;
+#ifdef S_ISLNK
+ else if (S_ISLNK(fst.st_mode))
+ result = PGFILETYPE_LNK;
+#endif
+ }
+
+ return result;
+}
/*-------------------------------------------------------------------------
- *
- * File-processing utility routines for frontend code
*
* Assorted utility functions to work on files.
*
#ifndef FILE_UTILS_H
#define FILE_UTILS_H
+#include <dirent.h>
+
+typedef enum PGFileType
+{
+ PGFILETYPE_ERROR,
+ PGFILETYPE_UNKNOWN,
+ PGFILETYPE_REG,
+ PGFILETYPE_DIR,
+ PGFILETYPE_LNK
+} PGFileType;
+
+#ifdef FRONTEND
extern int fsync_fname(const char *fname, bool isdir);
extern void fsync_pgdata(const char *pg_data, int serverVersion);
extern void fsync_dir_recurse(const char *dir);
extern int durable_rename(const char *oldfile, const char *newfile);
extern int fsync_parent_path(const char *fname);
+#endif
+
+extern PGFileType get_dirent_type(const char *path,
+ const struct dirent *de,
+ bool look_through_symlinks,
+ int elevel);
#endif /* FILE_UTILS_H */
our @pgcommonallfiles = qw(
archive.c base64.c checksum_helper.c
config_info.c controldata_utils.c d2s.c encnames.c exec.c
- f2s.c file_perm.c hashfn.c ip.c jsonapi.c
+ f2s.c file_perm.c file_utils.c hashfn.c ip.c jsonapi.c
keywords.c kwlookup.c link-canary.c md5.c
pg_get_line.c pg_lzcompress.c pgfnames.c psprintf.c relpath.c rmtree.c
saslprep.c scram-common.c string.c stringinfo.c unicode_norm.c username.c
}
our @pgcommonfrontendfiles = (
- @pgcommonallfiles, qw(fe_memutils.c file_utils.c
+ @pgcommonallfiles, qw(fe_memutils.c
logging.c restricted_token.c sprompt.c));
our @pgcommonbkndfiles = @pgcommonallfiles;
projects / users / c2main / postgres.git / commitdiff