getpeereid.c File Reference

#include "c.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <unistd.h>

Include dependency graph for getpeereid.c:

Go to the source code of this file.

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

---

Function Documentation

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

Definition at line 35 of file getpeereid.c.

Referenced by PQconnectPoll().

{
#if defined(SO_PEERCRED)
    /* Linux: use getsockopt(SO_PEERCRED) */
    struct ucred peercred;
    ACCEPT_TYPE_ARG3 so_len = sizeof(peercred);

    if (getsockopt(sock, SOL_SOCKET, SO_PEERCRED, &peercred, &so_len) != 0 ||
        so_len != sizeof(peercred))
        return -1;
    *uid = peercred.uid;
    *gid = peercred.gid;
    return 0;
#elif defined(LOCAL_PEERCRED)
    /* Debian with FreeBSD kernel: use getsockopt(LOCAL_PEERCRED) */
    struct xucred peercred;
    ACCEPT_TYPE_ARG3 so_len = sizeof(peercred);

    if (getsockopt(sock, 0, LOCAL_PEERCRED, &peercred, &so_len) != 0 ||
        so_len != sizeof(peercred) ||
        peercred.cr_version != XUCRED_VERSION)
        return -1;
    *uid = peercred.cr_uid;
    *gid = peercred.cr_gid;
    return 0;
#elif defined(HAVE_GETPEERUCRED)
    /* Solaris: use getpeerucred() */
    ucred_t    *ucred;

    ucred = NULL;               /* must be initialized to NULL */
    if (getpeerucred(sock, &ucred) == -1)
        return -1;

    *uid = ucred_geteuid(ucred);
    *gid = ucred_getegid(ucred);
    ucred_free(ucred);

    if (*uid == (uid_t) (-1) || *gid == (gid_t) (-1))
        return -1;
    return 0;
#else
    /* No implementation available on this platform */
    errno = ENOSYS;
    return -1;
#endif
}