PostgreSQL Source Code: src/port/getpeereid.c Source File

PostgreSQL Source Code git master
getpeereid.c
Go to the documentation of this file.
1/*-------------------------------------------------------------------------
2 *
3 * getpeereid.c
4 * get peer userid for UNIX-domain socket connection
5 *
6 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
7 *
8 *
9 * IDENTIFICATION
10 * src/port/getpeereid.c
11 *
12 *-------------------------------------------------------------------------
13 */
14
15#include "c.h"
16
17#include <sys/param.h>
18#include <sys/socket.h>
19#include <sys/un.h>
20#include <unistd.h>
21#ifdef HAVE_UCRED_H
22#include <ucred.h>
23#endif
24#ifdef HAVE_SYS_UCRED_H
25#include <sys/ucred.h>
26#endif
27
28
29/*
30 * BSD-style getpeereid() for platforms that lack it.
31 */
32int
33 getpeereid(int sock, uid_t *uid, gid_t *gid)
34{
35#if defined(SO_PEERCRED)
36 /* Linux: use getsockopt(SO_PEERCRED) */
37 struct ucred peercred;
38 socklen_t so_len = sizeof(peercred);
39
40 if (getsockopt(sock, SOL_SOCKET, SO_PEERCRED, &peercred, &so_len) != 0 ||
41 so_len != sizeof(peercred))
42 return -1;
43 *uid = peercred.uid;
44 *gid = peercred.gid;
45 return 0;
46#elif defined(LOCAL_PEERCRED)
47 /* Debian with FreeBSD kernel: use getsockopt(LOCAL_PEERCRED) */
48 struct xucred peercred;
49 socklen_t so_len = sizeof(peercred);
50
51 if (getsockopt(sock, 0, LOCAL_PEERCRED, &peercred, &so_len) != 0 ||
52 so_len != sizeof(peercred) ||
53 peercred.cr_version != XUCRED_VERSION)
54 return -1;
55 *uid = peercred.cr_uid;
56 *gid = peercred.cr_gid;
57 return 0;
58#elif defined(HAVE_GETPEERUCRED)
59 /* Solaris: use getpeerucred() */
60 ucred_t *ucred;
61
62 ucred = NULL; /* must be initialized to NULL */
63 if (getpeerucred(sock, &ucred) == -1)
64 return -1;
65
66 *uid = ucred_geteuid(ucred);
67 *gid = ucred_getegid(ucred);
68 ucred_free(ucred);
69
70 if (*uid == (uid_t) (-1) || *gid == (gid_t) (-1))
71 return -1;
72 return 0;
73#else
74 /* No implementation available on this platform */
75 errno = ENOSYS;
76 return -1;
77#endif
78}
int getpeereid(int sock, uid_t *uid, gid_t *gid)
Definition: getpeereid.c:33
unsigned int socklen_t
Definition: port.h:40
int gid_t
Definition: win32_port.h:235
int uid_t
Definition: win32_port.h:234

AltStyle によって変換されたページ (->オリジナル) /