ipc_recv.c (837B)
1 /* ISC license. */ 2 3 #include <skalibs/nonposix.h> 4 #include <string.h> 5 #include <errno.h> 6 #include <sys/socket.h> 7 #include <sys/un.h> 8 9 #include <skalibs/socket.h> 10 #include <skalibs/posixishard.h> 11 12 ssize_t ipc_recv (int fd, char *s, size_t len, char *path) 13 { 14 struct sockaddr_un sa = { .sun_family = AF_UNIX } ; 15 socklen_t total = sizeof sa ; 16 char tmp[len] ; 17 ssize_t r ; 18 do r = recvfrom(fd, tmp, len, 0, (struct sockaddr *)&sa, &total) ; 19 while ((r == -1) && (errno == EINTR)) ; 20 if (r < 0) return r ; 21 if (sa.sun_family != AF_UNIX) return (errno = EPROTO, -1) ; 22 if (path) 23 { 24 if (total == sizeof(sa_family_t)) path[0] = 0 ; 25 else 26 { 27 size_t l = strlen(sa.sun_path) ; 28 if (l > IPCPATH_MAX) return (errno = EPROTO, -1) ; 29 memcpy(path, sa.sun_path, l+1) ; 30 } 31 } 32 memcpy(s, tmp, r) ; 33 return r ; 34 }