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Repair postmaster memory leakage during password authentication.

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This commit is contained in:
Tom Lane 2001-02-07 23:31:38 +00:00
parent 6aa0821bcd
commit 6b52dc7491
1 changed files with 16 additions and 7 deletions
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23
src/backend/libpq/crypt.c
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@ -9,7 +9,7 @@
* Dec 17, 1997 - Todd A. Brandys
* Orignal Version Completed.
*
* $Id: crypt.c,v 1.29 2000/08/27 21:50:18 tgl Exp $
* $Id: crypt.c,v 1.30 2001/02/07 23:31:38 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -30,8 +30,11 @@
char **pwd_cache = NULL;
int pwd_cache_count = 0;
/*-------------------------------------------------------------------------*/
/*
* crypt_getpwdfilename --- get name of password file
*
* Note that result string is palloc'd, and should be freed by the caller.
*/
char *
crypt_getpwdfilename(void)
{
@ -45,8 +48,11 @@ crypt_getpwdfilename(void)
return pfnam;
}
/*-------------------------------------------------------------------------*/
/*
* crypt_getpwdreloadfilename --- get name of password-reload-needed flag file
*
* Note that result string is palloc'd, and should be freed by the caller.
*/
char *
crypt_getpwdreloadfilename(void)
{
@ -58,6 +64,7 @@ crypt_getpwdreloadfilename(void)
bufsize = strlen(pwdfilename) + strlen(CRYPT_PWD_RELOAD_SUFX) + 1;
rpfnam = (char *) palloc(bufsize);
snprintf(rpfnam, bufsize, "%s%s", pwdfilename, CRYPT_PWD_RELOAD_SUFX);
pfree(pwdfilename);
return rpfnam;
}
@ -77,6 +84,8 @@ crypt_openpwdfile(void)
fprintf(stderr, "Couldn't read %s: %s\n",
filename, strerror(errno));
pfree(filename);
return pwdfile;
}
@ -119,7 +128,6 @@ compar_user(const void *user_a, const void *user_b)
static void
crypt_loadpwdfile(void)
{
char *filename;
int result;
FILE *pwd_file;
@ -127,6 +135,7 @@ crypt_loadpwdfile(void)
filename = crypt_getpwdreloadfilename();
result = unlink(filename);
pfree(filename);
/*
* We want to delete the flag file before reading the contents of the
@ -134,7 +143,7 @@ crypt_loadpwdfile(void)
* successful. This means that a backend performed a COPY of the
* pg_shadow file to pg_pwd. Therefore we must now do a reload.
*/
if (!pwd_cache || !result)
if (!pwd_cache || result == 0)
{
if (pwd_cache)
{ /* free the old data only if this is a