41{
43 char *xlogRestoreCmd;
44 int rc;
46
48
50 xlogfname, NULL);
51
52 /*
53 * Execute restore_command, which should copy the missing file from
54 * archival storage.
55 */
56 fflush(NULL);
57 rc = system(xlogRestoreCmd);
58 pfree(xlogRestoreCmd);
59
60 if (rc == 0)
61 {
62 /*
63 * Command apparently succeeded, but let's make sure the file is
64 * really there now and has the correct size.
65 */
66 if (
stat(xlogpath, &stat_buf) == 0)
67 {
68 if (expectedSize > 0 && stat_buf.st_size != expectedSize)
69 pg_fatal(
"unexpected file size for \"%s\": %lld instead of %lld",
70 xlogfname, (long long int) stat_buf.st_size,
71 (long long int) expectedSize);
72 else
73 {
74 int xlogfd = open(xlogpath, O_RDONLY |
PG_BINARY, 0);
75
76 if (xlogfd < 0)
77 pg_fatal(
"could not open file \"%s\" restored from archive: %m",
78 xlogpath);
79 else
80 return xlogfd;
81 }
82 }
83 else
84 {
85 if (errno != ENOENT)
86 pg_fatal(
"could not stat file \"%s\": %m",
87 xlogpath);
88 }
89 }
90
91 /*
92 * If the failure was due to a signal, then it would be misleading to
93 * return with a failure at restoring the file. So just bail out and
94 * exit. Hard shell errors such as "command not found" are treated as
95 * fatal too.
96 */
98 pg_fatal(
"\"restore_command\" failed: %s",
100
101 /*
102 * The file is not available, so just let the caller decide what to do
103 * next.
104 */
105 pg_log_error(
"could not restore file \"%s\" from archive",
106 xlogfname);
107 return -1;
108}
char * BuildRestoreCommand(const char *restoreCommand, const char *xlogpath, const char *xlogfname, const char *lastRestartPointFname)
#define pg_log_error(...)
void pfree(void *pointer)
char * wait_result_to_str(int exitstatus)
bool wait_result_is_any_signal(int exit_status, bool include_command_not_found)