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17974ec259
After further review, we want to move in the direction of always quoting GUC names in error messages, rather than the previous (PG16) wildly mixed practice or the intermittent (mid-PG17) idea of doing this depending on how possibly confusing the GUC name is. This commit applies appropriate quotes to (almost?) all mentions of GUC names in error messages. It partially supersedesa243569bf6and8d9978a717, which had moved things a bit in the opposite direction but which then were abandoned in a partial state. Author: Peter Smith <smithpb2250@gmail.com> Discussion: https://www.postgresql.org/message-id/flat/CAHut%2BPv-kSN8SkxSdoHano_wPubqcg5789ejhCDZAcLFceBR-w%40mail.gmail.com
109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* archive.c
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* Routines to access WAL archives from frontend
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* src/fe_utils/archive.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres_fe.h"
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#include <unistd.h>
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#include <sys/stat.h>
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#include "access/xlog_internal.h"
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#include "common/archive.h"
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#include "common/logging.h"
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#include "fe_utils/archive.h"
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/*
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* RestoreArchivedFile
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*
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* Attempt to retrieve the specified file from off-line archival storage.
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* If successful, return a file descriptor of the restored file, else
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* return -1.
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*
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* For fixed-size files, the caller may pass the expected size as an
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* additional crosscheck on successful recovery. If the file size is not
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* known, set expectedSize = 0.
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*/
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int
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RestoreArchivedFile(const char *path, const char *xlogfname,
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off_t expectedSize, const char *restoreCommand)
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{
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char xlogpath[MAXPGPATH];
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char *xlogRestoreCmd;
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int rc;
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struct stat stat_buf;
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snprintf(xlogpath, MAXPGPATH, "%s/" XLOGDIR "/%s", path, xlogfname);
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xlogRestoreCmd = BuildRestoreCommand(restoreCommand, xlogpath,
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xlogfname, NULL);
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/*
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* Execute restore_command, which should copy the missing file from
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* archival storage.
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*/
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fflush(NULL);
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rc = system(xlogRestoreCmd);
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pfree(xlogRestoreCmd);
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if (rc == 0)
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{
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/*
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* Command apparently succeeded, but let's make sure the file is
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* really there now and has the correct size.
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*/
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if (stat(xlogpath, &stat_buf) == 0)
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{
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if (expectedSize > 0 && stat_buf.st_size != expectedSize)
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pg_fatal("unexpected file size for \"%s\": %lld instead of %lld",
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xlogfname, (long long int) stat_buf.st_size,
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(long long int) expectedSize);
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else
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{
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int xlogfd = open(xlogpath, O_RDONLY | PG_BINARY, 0);
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if (xlogfd < 0)
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pg_fatal("could not open file \"%s\" restored from archive: %m",
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xlogpath);
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else
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return xlogfd;
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}
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}
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else
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{
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if (errno != ENOENT)
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pg_fatal("could not stat file \"%s\": %m",
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xlogpath);
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}
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}
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/*
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* If the failure was due to a signal, then it would be misleading to
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* return with a failure at restoring the file. So just bail out and
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* exit. Hard shell errors such as "command not found" are treated as
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* fatal too.
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*/
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if (wait_result_is_any_signal(rc, true))
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pg_fatal("\"restore_command\" failed: %s",
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wait_result_to_str(rc));
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/*
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* The file is not available, so just let the caller decide what to do
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* next.
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*/
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pg_log_error("could not restore file \"%s\" from archive",
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xlogfname);
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return -1;
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}
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