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blind-to-named.c - blind - suckless command-line video editing utility
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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 }
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