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libpq: pass a memory allocation failure error up to PQconndefaults()

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Previously user name memory allocation failures were ignored and the
default user name set to NULL.
This commit is contained in:
Bruce Momjian
2014-03-20 11:48:31 -04:00
parent d1bdab2fa3
commit a4c8f14364
2 changed files with 16 additions and 7 deletions
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16
src/interfaces/libpq/fe-auth.c
View File

@@ -741,16 +741,18 @@ pg_fe_getauthname(void)
*/
pglock_thread();
if (!name)
{
/*
* We document PQconndefaults() to return NULL for a memory allocation
* failure. We don't have an API to return a user name lookup failure,
* so we just assume it always succeeds.
*/
#ifdef WIN32
if (GetUserName(username, &namesize))
name = username;
if (GetUserName(username, &namesize))
name = username;
#else
if (pqGetpwuid(geteuid(), &pwdstr, pwdbuf, sizeof(pwdbuf), &pw) == 0)
name = pw->pw_name;
if (pqGetpwuid(geteuid(), &pwdstr, pwdbuf, sizeof(pwdbuf), &pw) == 0)
name = pw->pw_name;
#endif
}
authn = name ? strdup(name) : NULL;

7
src/interfaces/libpq/fe-connect.c
View File

@@ -4482,6 +4482,13 @@ conninfo_add_defaults(PQconninfoOption *options, PQExpBuffer errorMessage)
if (strcmp(option->keyword, "user") == 0)
{
option->val = pg_fe_getauthname();
if (!option->val)
{
if (errorMessage)
printfPQExpBuffer(errorMessage,
libpq_gettext("out of memory\n"));
return false;
}
continue;
}
}