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Avoid unportable strftime() behavior in pg_dump/pg_dumpall.

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Commit ad5d46a449 thought that we could
get around the known portability issues of strftime's %Z specifier by
using %z instead.  However, that idea seems to have been innocent of
any actual research, as it certainly missed the facts that
(1) %z is not portable to pre-C99 systems, and
(2) %z doesn't actually act differently from %Z on Windows anyway.

Per failures on buildfarm member hamerkop.

While at it, centralize the code defining what strftime format we
want to use in pg_dump; three copies of that string seems a bit much.
This commit is contained in:
Tom Lane 2014-10-26 20:59:21 -04:00
parent 9711fa0608
commit f455fcfdb8
3 changed files with 25 additions and 6 deletions
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17
src/bin/pg_dump/dumputils.h
View File

@ -49,6 +49,23 @@ typedef struct SimpleStringList
#define atooid(x) ((Oid) strtoul((x), NULL, 10))
/*
* Preferred strftime(3) format specifier for printing timestamps in pg_dump
* and friends.
*
* We don't print the timezone on Windows, because the names are long and
* localized, which means they may contain characters in various random
* encodings; this has been seen to cause encoding errors when reading the
* dump script. Think not to get around that by using %z, because
* (1) %z is not portable to pre-C99 systems, and
* (2) %z doesn't actually act differently from %Z on Windows anyway.
*/
#ifndef WIN32
#define PGDUMP_STRFTIME_FMT "%Y-%m-%d %H:%M:%S %Z"
#else
#define PGDUMP_STRFTIME_FMT "%Y-%m-%d %H:%M:%S"
#endif
extern int quote_all_identifiers;
extern PQExpBuffer (*getLocalPQExpBuffer) (void);

8
src/bin/pg_dump/pg_backup_archiver.c
View File

@ -1047,14 +1047,16 @@ PrintTOCSummary(Archive *AHX, RestoreOptions *ropt)
teSection curSection;
OutputContext sav;
const char *fmtName;
struct tm *tm = localtime(&AH->createDate);
char stamp_str[64];
sav = SaveOutput(AH);
if (ropt->filename)
SetOutput(AH, ropt->filename, 0 /* no compression */ );
strftime(stamp_str, sizeof(stamp_str), "%Y-%m-%d %H:%M:%S %z", tm);
if (strftime(stamp_str, sizeof(stamp_str), PGDUMP_STRFTIME_FMT,
localtime(&AH->createDate)) == 0)
strcpy(stamp_str, "[unknown]");
ahprintf(AH, ";\n; Archive created at %s\n", stamp_str);
ahprintf(AH, "; dbname: %s\n; TOC Entries: %d\n; Compression: %d\n",
AH->archdbname, AH->tocCount, AH->compression);
@ -3544,7 +3546,7 @@ dumpTimestamp(ArchiveHandle *AH, const char *msg, time_t tim)
{
char buf[64];
if (strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S %z", localtime(&tim)) != 0)
if (strftime(buf, sizeof(buf), PGDUMP_STRFTIME_FMT, localtime(&tim)) != 0)
ahprintf(AH, "-- %s %s\n\n", msg, buf);
}

6
src/bin/pg_dump/pg_dumpall.c
View File

@ -48,7 +48,7 @@ static void makeAlterConfigCommand(PGconn *conn, const char *arrayitem,
const char *type, const char *name, const char *type2,
const char *name2);
static void dumpDatabases(PGconn *conn);
static void dumpTimestamp(char *msg);
static void dumpTimestamp(const char *msg);
static void doShellQuoting(PQExpBuffer buf, const char *str);
static void doConnStrQuoting(PQExpBuffer buf, const char *str);
@ -2058,12 +2058,12 @@ executeCommand(PGconn *conn, const char *query)
* dumpTimestamp
*/
static void
dumpTimestamp(char *msg)
dumpTimestamp(const char *msg)
{
char buf[64];
time_t now = time(NULL);
if (strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S %z", localtime(&now)) != 0)
if (strftime(buf, sizeof(buf), PGDUMP_STRFTIME_FMT, localtime(&now)) != 0)
fprintf(OPF, "-- %s %s\n\n", msg, buf);
}