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getpeereid.c File Reference
#include "c.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
Include dependency graph for getpeereid.c:

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Functions

int getpeereid (int sock, uid_t *uid, gid_t *gid)
 

Function Documentation

◆ getpeereid()

int getpeereid ( int  sock,
uid_t uid,
gid_t gid 
)

Definition at line 33 of file getpeereid.c.

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}
unsigned int socklen_t
Definition: port.h:40
int gid_t
Definition: win32_port.h:235
int uid_t
Definition: win32_port.h:234

Referenced by auth_peer(), and PQconnectPoll().