GopherProxy

	blind-to-named.c - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
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	---
	blind-to-named.c (1722B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include "common.h"
	3
	4 USAGE("[-a] path")
	5
	6 static void
	7 esend_fd(int sock, int fd)
	8 {
	9 char buf[1];
	10 struct iovec iov;
	11 struct msghdr msg;
	12 struct cmsghdr *cmsg;
	13 char cms[CMSG_SPACE(sizeof(fd))];
	14
	15 buf[0] = 0;
	16 iov.iov_base = buf;
	17 iov.iov_len = 1;
	18
	19 memset(&msg, 0, sizeof(msg));
	20 msg.msg_iov = &iov;
	21 msg.msg_iovlen = 1;
	22 msg.msg_control = (caddr_t)cms;
	23 msg.msg_controllen = CMSG_LEN(sizeof(fd));
	24
	25 cmsg = CMSG_FIRSTHDR(&msg);
	26 cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
	27 cmsg->cmsg_level = SOL_SOCKET;
	28 cmsg->cmsg_type = SCM_RIGHTS;
	29 memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));
	30
	31 if (sendmsg(sock, &msg, 0) != (ssize_t)iov.iov_len)
	32 eprintf("sendmsg:");
	33 }
	34
	35 int
	36 main(int argc, char *argv[])
	37 {
	38 struct sockaddr_un addr;
	39 int abstract = 0;
	40 int serverfd, connfd;
	41
	42 ARGBEGIN {
	43 case 'a':
	44 abstract = 1;
	45 break;
	46 default:
	47 usage();
	48 } ARGEND;
	49 if (argc != 1)
	50 usage();
	51
	52 memset(&addr, 0, sizeof(addr));
	53 addr.sun_family = AF_UNIX;
	54 if (strlen(argv[0]) + (size_t)(1 + abstract) > sizeof(addr.sun_p…
	55 errno = ENAMETOOLONG;
	56 eprintf("%s:", argv[0]);
	57 }
	58 strcpy(addr.sun_path + abstract, argv[0]);
	59
	60 serverfd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
	61 if (serverfd < 0)
	62 eprintf("socket PF_UNIX SOCK_SEQPACKET:");
	63
	64 if (bind(serverfd, (const struct sockaddr *)&addr, (size_t)sizeo…
	65 eprintf("bind %s%s%s:",
	66 abstract ? "<abstract:" : "",
	67 addr.sun_path + abstract,
	68 abstract ? ">" : "");
	69
	70 if (listen(serverfd, 1) < 0)
	71 eprintf("listen:");
	72
	73 connfd = accept(serverfd, NULL, NULL);
	74 if (connfd < 0)
	75 eprintf("accept:");
	76
	77 if (*addr.sun_path)
	78 unlink(addr.sun_path);
	79 close(serverfd);
	80
	81 esend_fd(connfd, STDIN_FILENO);
	82 close(connfd);
	83 return 0;
	84 }