#endif
#include "catalog/catalog.h"
+#include "common/file_utils.h"
#include "common/restricted_token.h"
#include "common/username.h"
#include "mb/pg_wchar.h"
#include "fe_utils/string_utils.h"
-/* Define PG_FLUSH_DATA_WORKS if we have an implementation for pg_flush_data */
-#if defined(HAVE_SYNC_FILE_RANGE)
-#define PG_FLUSH_DATA_WORKS 1
-#elif defined(USE_POSIX_FADVISE) && defined(POSIX_FADV_DONTNEED)
-#define PG_FLUSH_DATA_WORKS 1
-#endif
-
/* Ideally this would be in a .h file, but it hardly seems worth the trouble */
extern const char *select_default_timezone(const char *share_path);
#endif
static char **readfile(const char *path);
static void writefile(char *path, char **lines);
-static void walkdir(const char *path,
- void (*action) (const char *fname, bool isdir),
- bool process_symlinks);
-#ifdef PG_FLUSH_DATA_WORKS
-static void pre_sync_fname(const char *fname, bool isdir);
-#endif
-static void fsync_fname_ext(const char *fname, bool isdir);
static FILE *popen_check(const char *command, const char *mode);
static void exit_nicely(void);
static char *get_id(void);
static void vacuum_db(FILE *cmdfd);
static void make_template0(FILE *cmdfd);
static void make_postgres(FILE *cmdfd);
-static void fsync_pgdata(void);
static void trapsig(int signum);
static void check_ok(void);
static char *escape_quotes(const char *src);
}
}
-/*
- * walkdir: recursively walk a directory, applying the action to each
- * regular file and directory (including the named directory itself).
- *
- * If process_symlinks is true, the action and recursion are also applied
- * to regular files and directories that are pointed to by symlinks in the
- * given directory; otherwise symlinks are ignored. Symlinks are always
- * ignored in subdirectories, ie we intentionally don't pass down the
- * process_symlinks flag to recursive calls.
- *
- * Errors are reported but not considered fatal.
- *
- * See also walkdir in fd.c, which is a backend version of this logic.
- */
-static void
-walkdir(const char *path,
- void (*action) (const char *fname, bool isdir),
- bool process_symlinks)
-{
- DIR *dir;
- struct dirent *de;
-
- dir = opendir(path);
- if (dir == NULL)
- {
- fprintf(stderr, _("%s: could not open directory \"%s\": %s\n"),
- progname, path, strerror(errno));
- return;
- }
-
- while (errno = 0, (de = readdir(dir)) != NULL)
- {
- char subpath[MAXPGPATH];
- struct stat fst;
- int sret;
-
- if (strcmp(de->d_name, ".") == 0 ||
- strcmp(de->d_name, "..") == 0)
- continue;
-
- snprintf(subpath, MAXPGPATH, "%s/%s", path, de->d_name);
-
- if (process_symlinks)
- sret = stat(subpath, &fst);
- else
- sret = lstat(subpath, &fst);
-
- if (sret < 0)
- {
- fprintf(stderr, _("%s: could not stat file \"%s\": %s\n"),
- progname, subpath, strerror(errno));
- continue;
- }
-
- if (S_ISREG(fst.st_mode))
- (*action) (subpath, false);
- else if (S_ISDIR(fst.st_mode))
- walkdir(subpath, action, false);
- }
-
- if (errno)
- fprintf(stderr, _("%s: could not read directory \"%s\": %s\n"),
- progname, path, strerror(errno));
-
- (void) closedir(dir);
-
- /*
- * It's important to fsync the destination directory itself as individual
- * file fsyncs don't guarantee that the directory entry for the file is
- * synced. Recent versions of ext4 have made the window much wider but
- * it's been an issue for ext3 and other filesystems in the past.
- */
- (*action) (path, true);
-}
-
-/*
- * Hint to the OS that it should get ready to fsync() this file.
- *
- * Ignores errors trying to open unreadable files, and reports other errors
- * non-fatally.
- */
-#ifdef PG_FLUSH_DATA_WORKS
-
-static void
-pre_sync_fname(const char *fname, bool isdir)
-{
- int fd;
-
- fd = open(fname, O_RDONLY | PG_BINARY);
-
- if (fd < 0)
- {
- if (errno == EACCES || (isdir && errno == EISDIR))
- return;
- fprintf(stderr, _("%s: could not open file \"%s\": %s\n"),
- progname, fname, strerror(errno));
- return;
- }
-
- /*
- * We do what pg_flush_data() would do in the backend: prefer to use
- * sync_file_range, but fall back to posix_fadvise. We ignore errors
- * because this is only a hint.
- */
-#if defined(HAVE_SYNC_FILE_RANGE)
- (void) sync_file_range(fd, 0, 0, SYNC_FILE_RANGE_WRITE);
-#elif defined(USE_POSIX_FADVISE) && defined(POSIX_FADV_DONTNEED)
- (void) posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED);
-#else
-#error PG_FLUSH_DATA_WORKS should not have been defined
-#endif
-
- (void) close(fd);
-}
-
-#endif /* PG_FLUSH_DATA_WORKS */
-
-/*
- * fsync_fname_ext -- Try to fsync a file or directory
- *
- * Ignores errors trying to open unreadable files, or trying to fsync
- * directories on systems where that isn't allowed/required. Reports
- * other errors non-fatally.
- */
-static void
-fsync_fname_ext(const char *fname, bool isdir)
-{
- int fd;
- int flags;
- int returncode;
-
- /*
- * Some OSs require directories to be opened read-only whereas other
- * systems don't allow us to fsync files opened read-only; so we need both
- * cases here. Using O_RDWR will cause us to fail to fsync files that are
- * not writable by our userid, but we assume that's OK.
- */
- flags = PG_BINARY;
- if (!isdir)
- flags |= O_RDWR;
- else
- flags |= O_RDONLY;
-
- /*
- * Open the file, silently ignoring errors about unreadable files (or
- * unsupported operations, e.g. opening a directory under Windows), and
- * logging others.
- */
- fd = open(fname, flags);
- if (fd < 0)
- {
- if (errno == EACCES || (isdir && errno == EISDIR))
- return;
- fprintf(stderr, _("%s: could not open file \"%s\": %s\n"),
- progname, fname, strerror(errno));
- return;
- }
-
- returncode = fsync(fd);
-
- /*
- * Some OSes don't allow us to fsync directories at all, so we can ignore
- * those errors. Anything else needs to be reported.
- */
- if (returncode != 0 && !(isdir && errno == EBADF))
- fprintf(stderr, _("%s: could not fsync file \"%s\": %s\n"),
- progname, fname, strerror(errno));
-
- (void) close(fd);
-}
-
/*
* Open a subcommand with suitable error messaging
*/
PG_CMD_PUTS(*line);
}
-/*
- * Issue fsync recursively on PGDATA and all its contents.
- *
- * We fsync regular files and directories wherever they are, but we
- * follow symlinks only for pg_xlog and immediately under pg_tblspc.
- * Other symlinks are presumed to point at files we're not responsible
- * for fsyncing, and might not have privileges to write at all.
- *
- * Errors are reported but not considered fatal.
- */
-static void
-fsync_pgdata(void)
-{
- bool xlog_is_symlink;
- char pg_xlog[MAXPGPATH];
- char pg_tblspc[MAXPGPATH];
-
- fputs(_("syncing data to disk ... "), stdout);
- fflush(stdout);
-
- snprintf(pg_xlog, MAXPGPATH, "%s/pg_xlog", pg_data);
- snprintf(pg_tblspc, MAXPGPATH, "%s/pg_tblspc", pg_data);
-
- /*
- * If pg_xlog is a symlink, we'll need to recurse into it separately,
- * because the first walkdir below will ignore it.
- */
- xlog_is_symlink = false;
-
-#ifndef WIN32
- {
- struct stat st;
-
- if (lstat(pg_xlog, &st) < 0)
- fprintf(stderr, _("%s: could not stat file \"%s\": %s\n"),
- progname, pg_xlog, strerror(errno));
- else if (S_ISLNK(st.st_mode))
- xlog_is_symlink = true;
- }
-#else
- if (pgwin32_is_junction(pg_xlog))
- xlog_is_symlink = true;
-#endif
-
- /*
- * If possible, hint to the kernel that we're soon going to fsync the data
- * directory and its contents.
- */
-#ifdef PG_FLUSH_DATA_WORKS
- walkdir(pg_data, pre_sync_fname, false);
- if (xlog_is_symlink)
- walkdir(pg_xlog, pre_sync_fname, false);
- walkdir(pg_tblspc, pre_sync_fname, true);
-#endif
-
- /*
- * Now we do the fsync()s in the same order.
- *
- * The main call ignores symlinks, so in addition to specially processing
- * pg_xlog if it's a symlink, pg_tblspc has to be visited separately with
- * process_symlinks = true. Note that if there are any plain directories
- * in pg_tblspc, they'll get fsync'd twice. That's not an expected case
- * so we don't worry about optimizing it.
- */
- walkdir(pg_data, fsync_fname_ext, false);
- if (xlog_is_symlink)
- walkdir(pg_xlog, fsync_fname_ext, false);
- walkdir(pg_tblspc, fsync_fname_ext, true);
-
- check_ok();
-}
/*
exit_nicely();
}
- fsync_pgdata();
+ fputs(_("syncing data to disk ... "), stdout);
+ fflush(stdout);
+ fsync_pgdata(pg_data, progname);
+ check_ok();
return 0;
}
initialize_data_directory();
if (do_sync)
- fsync_pgdata();
+ {
+ fputs(_("syncing data to disk ... "), stdout);
+ fflush(stdout);
+ fsync_pgdata(pg_data, progname);
+ check_ok();
+ }
else
printf(_("\nSync to disk skipped.\nThe data directory might become corrupt if the operating system crashes.\n"));
# src/bin/initdb/nls.mk
CATALOG_NAME = initdb
AVAIL_LANGUAGES = cs de es fr it ja ko pl pt_BR ru sv zh_CN
-GETTEXT_FILES = findtimezone.c initdb.c ../../common/exec.c ../../common/fe_memutils.c ../../common/pgfnames.c ../../common/restricted_token.c ../../common/rmtree.c ../../common/username.c ../../common/wait_error.c ../../port/dirmod.c
+GETTEXT_FILES = findtimezone.c initdb.c ../../common/exec.c ../../common/fe_memutils.c ../../common/file_utils.c ../../common/pgfnames.c ../../common/restricted_token.c ../../common/rmtree.c ../../common/username.c ../../common/wait_error.c ../../port/dirmod.c
GETTEXT_TRIGGERS = simple_prompt
# src/bin/pg_basebackup/nls.mk
CATALOG_NAME = pg_basebackup
AVAIL_LANGUAGES = de es fr it ko pl pt_BR ru zh_CN
-GETTEXT_FILES = pg_basebackup.c pg_receivexlog.c pg_recvlogical.c receivelog.c streamutil.c ../../common/fe_memutils.c
+GETTEXT_FILES = pg_basebackup.c pg_receivexlog.c pg_recvlogical.c receivelog.c streamutil.c ../../common/fe_memutils.c ../../common/file_utils.c
GETTEXT_TRIGGERS = simple_prompt
md5.o pg_lzcompress.o pgfnames.o psprintf.o relpath.o rmtree.o \
string.o username.o wait_error.o
-OBJS_FRONTEND = $(OBJS_COMMON) fe_memutils.o restricted_token.o
+OBJS_FRONTEND = $(OBJS_COMMON) fe_memutils.o file_utils.o restricted_token.o
OBJS_SRV = $(OBJS_COMMON:%.o=%_srv.o)
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * File-processing utility routines.
+ *
+ * Assorted utility functions to work on files.
+ *
+ *
+ * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/common/file_utils.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres_fe.h"
+
+#include <dirent.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "common/file_utils.h"
+
+
+/* Define PG_FLUSH_DATA_WORKS if we have an implementation for pg_flush_data */
+#if defined(HAVE_SYNC_FILE_RANGE)
+#define PG_FLUSH_DATA_WORKS 1
+#elif defined(USE_POSIX_FADVISE) && defined(POSIX_FADV_DONTNEED)
+#define PG_FLUSH_DATA_WORKS 1
+#endif
+
+#ifdef PG_FLUSH_DATA_WORKS
+static void pre_sync_fname(const char *fname, bool isdir,
+ const char *progname);
+#endif
+static void walkdir(const char *path,
+ void (*action) (const char *fname, bool isdir, const char *progname),
+ bool process_symlinks, const char *progname);
+
+/*
+ * Issue fsync recursively on PGDATA and all its contents.
+ *
+ * We fsync regular files and directories wherever they are, but we
+ * follow symlinks only for pg_xlog and immediately under pg_tblspc.
+ * Other symlinks are presumed to point at files we're not responsible
+ * for fsyncing, and might not have privileges to write at all.
+ *
+ * Errors are reported but not considered fatal.
+ */
+void
+fsync_pgdata(const char *pg_data, const char *progname)
+{
+ bool xlog_is_symlink;
+ char pg_xlog[MAXPGPATH];
+ char pg_tblspc[MAXPGPATH];
+
+ snprintf(pg_xlog, MAXPGPATH, "%s/pg_xlog", pg_data);
+ snprintf(pg_tblspc, MAXPGPATH, "%s/pg_tblspc", pg_data);
+
+ /*
+ * If pg_xlog is a symlink, we'll need to recurse into it separately,
+ * because the first walkdir below will ignore it.
+ */
+ xlog_is_symlink = false;
+
+#ifndef WIN32
+ {
+ struct stat st;
+
+ if (lstat(pg_xlog, &st) < 0)
+ fprintf(stderr, _("%s: could not stat file \"%s\": %s\n"),
+ progname, pg_xlog, strerror(errno));
+ else if (S_ISLNK(st.st_mode))
+ xlog_is_symlink = true;
+ }
+#else
+ if (pgwin32_is_junction(pg_xlog))
+ xlog_is_symlink = true;
+#endif
+
+ /*
+ * If possible, hint to the kernel that we're soon going to fsync the data
+ * directory and its contents.
+ */
+#ifdef PG_FLUSH_DATA_WORKS
+ walkdir(pg_data, pre_sync_fname, false, progname);
+ if (xlog_is_symlink)
+ walkdir(pg_xlog, pre_sync_fname, false, progname);
+ walkdir(pg_tblspc, pre_sync_fname, true, progname);
+#endif
+
+ /*
+ * Now we do the fsync()s in the same order.
+ *
+ * The main call ignores symlinks, so in addition to specially processing
+ * pg_xlog if it's a symlink, pg_tblspc has to be visited separately with
+ * process_symlinks = true. Note that if there are any plain directories
+ * in pg_tblspc, they'll get fsync'd twice. That's not an expected case
+ * so we don't worry about optimizing it.
+ */
+ walkdir(pg_data, fsync_fname, false, progname);
+ if (xlog_is_symlink)
+ walkdir(pg_xlog, fsync_fname, false, progname);
+ walkdir(pg_tblspc, fsync_fname, true, progname);
+}
+
+/*
+ * walkdir: recursively walk a directory, applying the action to each
+ * regular file and directory (including the named directory itself).
+ *
+ * If process_symlinks is true, the action and recursion are also applied
+ * to regular files and directories that are pointed to by symlinks in the
+ * given directory; otherwise symlinks are ignored. Symlinks are always
+ * ignored in subdirectories, ie we intentionally don't pass down the
+ * process_symlinks flag to recursive calls.
+ *
+ * Errors are reported but not considered fatal.
+ *
+ * See also walkdir in fd.c, which is a backend version of this logic.
+ */
+static void
+walkdir(const char *path,
+ void (*action) (const char *fname, bool isdir, const char *progname),
+ bool process_symlinks, const char *progname)
+{
+ DIR *dir;
+ struct dirent *de;
+
+ dir = opendir(path);
+ if (dir == NULL)
+ {
+ fprintf(stderr, _("%s: could not open directory \"%s\": %s\n"),
+ progname, path, strerror(errno));
+ return;
+ }
+
+ while (errno = 0, (de = readdir(dir)) != NULL)
+ {
+ char subpath[MAXPGPATH];
+ struct stat fst;
+ int sret;
+
+ if (strcmp(de->d_name, ".") == 0 ||
+ strcmp(de->d_name, "..") == 0)
+ continue;
+
+ snprintf(subpath, MAXPGPATH, "%s/%s", path, de->d_name);
+
+ if (process_symlinks)
+ sret = stat(subpath, &fst);
+ else
+ sret = lstat(subpath, &fst);
+
+ if (sret < 0)
+ {
+ fprintf(stderr, _("%s: could not stat file \"%s\": %s\n"),
+ progname, subpath, strerror(errno));
+ continue;
+ }
+
+ if (S_ISREG(fst.st_mode))
+ (*action) (subpath, false, progname);
+ else if (S_ISDIR(fst.st_mode))
+ walkdir(subpath, action, false, progname);
+ }
+
+ if (errno)
+ fprintf(stderr, _("%s: could not read directory \"%s\": %s\n"),
+ progname, path, strerror(errno));
+
+ (void) closedir(dir);
+
+ /*
+ * It's important to fsync the destination directory itself as individual
+ * file fsyncs don't guarantee that the directory entry for the file is
+ * synced. Recent versions of ext4 have made the window much wider but
+ * it's been an issue for ext3 and other filesystems in the past.
+ */
+ (*action) (path, true, progname);
+}
+
+/*
+ * Hint to the OS that it should get ready to fsync() this file.
+ *
+ * Ignores errors trying to open unreadable files, and reports other errors
+ * non-fatally.
+ */
+#ifdef PG_FLUSH_DATA_WORKS
+
+static void
+pre_sync_fname(const char *fname, bool isdir, const char *progname)
+{
+ int fd;
+
+ fd = open(fname, O_RDONLY | PG_BINARY);
+
+ if (fd < 0)
+ {
+ if (errno == EACCES || (isdir && errno == EISDIR))
+ return;
+ fprintf(stderr, _("%s: could not open file \"%s\": %s\n"),
+ progname, fname, strerror(errno));
+ return;
+ }
+
+ /*
+ * We do what pg_flush_data() would do in the backend: prefer to use
+ * sync_file_range, but fall back to posix_fadvise. We ignore errors
+ * because this is only a hint.
+ */
+#if defined(HAVE_SYNC_FILE_RANGE)
+ (void) sync_file_range(fd, 0, 0, SYNC_FILE_RANGE_WRITE);
+#elif defined(USE_POSIX_FADVISE) && defined(POSIX_FADV_DONTNEED)
+ (void) posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED);
+#else
+#error PG_FLUSH_DATA_WORKS should not have been defined
+#endif
+
+ (void) close(fd);
+}
+
+#endif /* PG_FLUSH_DATA_WORKS */
+
+/*
+ * fsync_fname -- Try to fsync a file or directory
+ *
+ * Ignores errors trying to open unreadable files, or trying to fsync
+ * directories on systems where that isn't allowed/required. Reports
+ * other errors non-fatally.
+ */
+void
+fsync_fname(const char *fname, bool isdir, const char *progname)
+{
+ int fd;
+ int flags;
+ int returncode;
+
+ /*
+ * Some OSs require directories to be opened read-only whereas other
+ * systems don't allow us to fsync files opened read-only; so we need both
+ * cases here. Using O_RDWR will cause us to fail to fsync files that are
+ * not writable by our userid, but we assume that's OK.
+ */
+ flags = PG_BINARY;
+ if (!isdir)
+ flags |= O_RDWR;
+ else
+ flags |= O_RDONLY;
+
+ /*
+ * Open the file, silently ignoring errors about unreadable files (or
+ * unsupported operations, e.g. opening a directory under Windows), and
+ * logging others.
+ */
+ fd = open(fname, flags);
+ if (fd < 0)
+ {
+ if (errno == EACCES || (isdir && errno == EISDIR))
+ return;
+ fprintf(stderr, _("%s: could not open file \"%s\": %s\n"),
+ progname, fname, strerror(errno));
+ return;
+ }
+
+ returncode = fsync(fd);
+
+ /*
+ * Some OSes don't allow us to fsync directories at all, so we can ignore
+ * those errors. Anything else needs to be reported.
+ */
+ if (returncode != 0 && !(isdir && errno == EBADF))
+ fprintf(stderr, _("%s: could not fsync file \"%s\": %s\n"),
+ progname, fname, strerror(errno));
+
+ (void) close(fd);
+}
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * File-processing utility routines for frontend code
+ *
+ * Assorted utility functions to work on files.
+ *
+ *
+ * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/common/file_utils.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef FILE_UTILS_H
+#define FILE_UTILS_H
+
+extern void fsync_fname(const char *fname, bool isdir,
+ const char *progname);
+extern void fsync_pgdata(const char *pg_data, const char *progname);
+
+#endif /* FILE_UTILS_H */
string.c username.c wait_error.c);
our @pgcommonfrontendfiles = (
- @pgcommonallfiles, qw(fe_memutils.c
+ @pgcommonallfiles, qw(fe_memutils.c file_utils.c
restricted_token.c));
our @pgcommonbkndfiles = @pgcommonallfiles;
projects / postgresql.git / commitdiff