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Assume that we have utime() and <utime.h>.

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These are required by POSIX since SUSv2, and no live platforms fail
to provide them.  On Windows, utime() exists and we bring our own
<utime.h>, so we're good there too.  So remove the configure probes
and ad-hoc substitute code.  We don't need to check for utimes()
anymore either, since that was only used as a substitute.

In passing, make the Windows build include <sys/utime.h> only where
we need it, not everywhere.

This is part of a series of commits to get rid of no-longer-relevant
configure checks and dead src/port/ code.  I'm committing them separately
to make it easier to back out individual changes if they prove less
portable than I expect.

Discussion: https://postgr.es/m/15379.1582221614@sss.pgh.pa.us
This commit is contained in:
Tom Lane
2020-02-21 14:04:19 -05:00
parent f88a058200
commit 481c8e9232
8 changed files with 8 additions and 59 deletions
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27
src/backend/utils/init/miscinit.c
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@ -26,9 +26,7 @@
#include <pwd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif
#include "access/htup_details.h"
#include "catalog/pg_authid.h"
@ -1213,29 +1211,8 @@ TouchSocketLockFiles(void)
if (strcmp(socketLockFile, DIRECTORY_LOCK_FILE) == 0)
continue;
/*
* utime() is POSIX standard, utimes() is a common alternative; if we
* have neither, fall back to actually reading the file (which only
* sets the access time not mod time, but that should be enough in
* most cases). In all paths, we ignore errors.
*/
#ifdef HAVE_UTIME
utime(socketLockFile, NULL);
#else /* !HAVE_UTIME */
#ifdef HAVE_UTIMES
utimes(socketLockFile, NULL);
#else /* !HAVE_UTIMES */
int fd;
char buffer[1];
fd = open(socketLockFile, O_RDONLY | PG_BINARY, 0);
if (fd >= 0)
{
read(fd, buffer, sizeof(buffer));
close(fd);
}
#endif /* HAVE_UTIMES */
#endif /* HAVE_UTIME */
/* we just ignore any error here */
(void) utime(socketLockFile, NULL);
}
}