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os: Add an implementation of wl_os_socket_peercred() for darwin

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This adds an alternative implementation of wl_os_socket_peercred() using
getpeereid(3) and LOCAL_PEERPID, similar to changes I recently made to
xorg-server.

Signed-off-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com>
This commit is contained in:
Jeremy Huddleston Sequoia 2023-01-27 16:42:29 -08:00
parent 83e9c9e117
commit aa7c02ff80
2 changed files with 17 additions and 0 deletions
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1
meson.build
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@ -40,6 +40,7 @@ endforeach
have_funcs = [
'accept4',
'getpeereid',
'mkostemp',
'posix_fallocate',
'prctl',

16
src/wayland-os.c
View file

@ -115,6 +115,22 @@ wl_os_socket_peercred(int sockfd, uid_t *uid, gid_t *gid, pid_t *pid)
*pid = ucred.pid;
return 0;
}
#elif defined(HAVE_GETPEEREID) && defined(LOCAL_PEERPID)
int
wl_os_socket_peercred(int sockfd, uid_t *uid, gid_t *gid, pid_t *pid)
{
socklen_t len;
if (getpeereid(sockfd, uid, gid) != 0) {
return -1;
}
len = sizeof(pid_t);
if (getsockopt(sockfd, SOL_LOCAL, LOCAL_PEERPID, pid, &len) != 0) {
return -1;
}
return 0;
}
#else
#error "Don't know how to read ucred on this platform"
#endif