mirror of
https://github.com/postgres/postgres.git
synced 2026-03-02 21:30:36 -05:00
51f62d505e
eliminating some wildly inconsistent coding in various parts of the system. I set MAXPGPATH = 1024 in config.h.in. If anyone is really convinced that there ought to be a configure-time test to set the value, go right ahead ... but I think it's a waste of time.
156 lines
4.2 KiB
C
156 lines
4.2 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* version.c
|
|
* Routines to handle Postgres version number.
|
|
*
|
|
* Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
*
|
|
* IDENTIFICATION
|
|
* $Header: /cvsroot/pgsql/src/utils/Attic/version.c,v 1.13 1999/10/25 03:08:03 tgl Exp $
|
|
*
|
|
* STANDALONE CODE - do not use error routines as this code is not linked
|
|
* with any...
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#include <sys/types.h>
|
|
#include <sys/file.h>
|
|
#include <fcntl.h> /* For open() flags */
|
|
#include <sys/stat.h>
|
|
#include <ctype.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
|
|
#include "postgres.h"
|
|
|
|
#include "storage/fd.h" /* for O_ */
|
|
|
|
#include "version.h"
|
|
|
|
|
|
static void
|
|
PathSetVersionFilePath(const char *path, char *filepathbuf)
|
|
{
|
|
/*----------------------------------------------------------------------------
|
|
PathSetVersionFilePath
|
|
|
|
Destructively change "filepathbuf" to contain the concatenation of "path"
|
|
and the name of the version file name.
|
|
----------------------------------------------------------------------------*/
|
|
if ((strlen(path) + 1 + strlen(PG_VERFILE)) >= MAXPGPATH)
|
|
*filepathbuf = '\0';
|
|
else
|
|
sprintf(filepathbuf, "%s%c%s", path, SEP_CHAR, PG_VERFILE);
|
|
}
|
|
|
|
|
|
|
|
void
|
|
ValidatePgVersion(const char *path, char **reason_p)
|
|
{
|
|
/*----------------------------------------------------------------------------
|
|
Determine whether the PG_VERSION file in directory <path> indicates
|
|
a data version compatible with the version of this program.
|
|
|
|
If compatible, return <*reason_p> == NULL. Otherwise, malloc space,
|
|
fill it with a text string explaining how it isn't compatible (or why
|
|
we can't tell), and return a pointer to that space as <*reason_p>.
|
|
-----------------------------------------------------------------------------*/
|
|
int fd;
|
|
int nread;
|
|
char myversion[32];
|
|
char version[32];
|
|
char full_path[MAXPGPATH];
|
|
|
|
PathSetVersionFilePath(path, full_path);
|
|
|
|
sprintf(myversion, "%s.%s\n", PG_RELEASE, PG_VERSION);
|
|
|
|
#ifndef __CYGWIN32__
|
|
if ((fd = open(full_path, O_RDONLY, 0)) == -1)
|
|
#else
|
|
if ((fd = open(full_path, O_RDONLY | O_BINARY, 0)) == -1)
|
|
#endif
|
|
{
|
|
*reason_p = malloc(100 + strlen(full_path));
|
|
sprintf(*reason_p, "File '%s' does not exist or no read permission.", full_path);
|
|
}
|
|
else
|
|
{
|
|
nread = read(fd, version, sizeof(version)-1);
|
|
if (nread < 4 ||
|
|
!isdigit(version[0]) ||
|
|
version[nread-1] != '\n')
|
|
{
|
|
*reason_p = malloc(100 + strlen(full_path));
|
|
sprintf(*reason_p, "File '%s' does not have a valid format "
|
|
"for a PG_VERSION file.", full_path);
|
|
}
|
|
else
|
|
{
|
|
version[nread] = '\0';
|
|
if (strcmp(version, myversion) != 0)
|
|
{
|
|
*reason_p = malloc(200 + strlen(full_path));
|
|
sprintf(*reason_p,
|
|
"Version number in file '%s' should be %s, "
|
|
"not %s.",
|
|
full_path, myversion, version);
|
|
}
|
|
else
|
|
*reason_p = NULL;
|
|
}
|
|
close(fd);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void
|
|
SetPgVersion(const char *path, char **reason_p)
|
|
{
|
|
/*---------------------------------------------------------------------------
|
|
Create the PG_VERSION file in the directory <path>.
|
|
|
|
If we fail, allocate storage, fill it with a text string explaining why,
|
|
and return a pointer to that storage as <*reason_p>. If we succeed,
|
|
return *reason_p = NULL.
|
|
---------------------------------------------------------------------------*/
|
|
int fd;
|
|
char version[32];
|
|
char full_path[MAXPGPATH];
|
|
|
|
PathSetVersionFilePath(path, full_path);
|
|
|
|
sprintf(version, "%s.%s\n", PG_RELEASE, PG_VERSION);
|
|
|
|
#ifndef __CYGWIN32__
|
|
fd = open(full_path, O_WRONLY | O_CREAT | O_EXCL, 0666);
|
|
#else
|
|
fd = open(full_path, O_WRONLY | O_CREAT | O_EXCL | O_BINARY, 0666);
|
|
#endif
|
|
if (fd < 0)
|
|
{
|
|
*reason_p = malloc(100 + strlen(full_path));
|
|
sprintf(*reason_p,
|
|
"Unable to create file '%s', errno from open(): %s (%d).",
|
|
full_path, strerror(errno), errno);
|
|
}
|
|
else
|
|
{
|
|
int rc; /* return code from some function we call */
|
|
|
|
rc = write(fd, version, strlen(version));
|
|
if (rc != strlen(version))
|
|
{
|
|
*reason_p = malloc(100 + strlen(full_path));
|
|
sprintf(*reason_p,
|
|
"Failed to write to file '%s', after it was already "
|
|
"open. Errno from write(): %s (%d)",
|
|
full_path, strerror(errno), errno);
|
|
}
|
|
else
|
|
*reason_p = NULL;
|
|
close(fd);
|
|
}
|
|
}
|