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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2012-11-29 19:57:17 -0500 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2012-11-29 19:57:17 -0500 |
| commit | c6a91c92b51a13f204495851cf7a90e55ec16f0a (patch) | |
| tree | 41156f9ca710adfef5901d613b87fb4b62175f17 /src/backend | |
| parent | 6f9a9da85c9015e773d12e8571c469e5a2a6b3fb (diff) | |
| download | postgresql-c6a91c92b51a13f204495851cf7a90e55ec16f0a.tar.gz postgresql-c6a91c92b51a13f204495851cf7a90e55ec16f0a.zip | |
Produce a more useful error message for over-length Unix socket paths.
The length of a socket path name is constrained by the size of struct
sockaddr_un, and there's not a lot we can do about it since that is a
kernel API. However, it would be a good thing if we produced an
intelligible error message when the user specifies a socket path that's too
long --- and getaddrinfo's standard API is too impoverished to do this in
the natural way. So insert explicit tests at the places where we construct
a socket path name. Now you'll get an error that makes sense and even
tells you what the limit is, rather than something generic like
"Non-recoverable failure in name resolution".
Per trouble report from Jeremy Drake and a fix idea from Andrew Dunstan.
Diffstat (limited to 'src/backend')
| -rw-r--r-- | src/backend/libpq/pqcomm.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c index b83a2efb698..c79c846a660 100644 --- a/src/backend/libpq/pqcomm.c +++ b/src/backend/libpq/pqcomm.c @@ -493,6 +493,14 @@ static int Lock_AF_UNIX(unsigned short portNumber, char *unixSocketName) { UNIXSOCK_PATH(sock_path, portNumber, unixSocketName); + if (strlen(sock_path) >= UNIXSOCK_PATH_BUFLEN) + { + ereport(LOG, + (errmsg("Unix-domain socket path \"%s\" is too long (maximum %d bytes)", + sock_path, + (int) (UNIXSOCK_PATH_BUFLEN - 1)))); + return STATUS_ERROR; + } /* * Grab an interlock file associated with the socket file. |