| 1 | /* -*- c-file-style: "linux" -*-
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| 2 | *
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| 3 | * Try creating a Unix-domain socket, opening it, and reading from it.
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| 4 | * The POSIX name for these is AF_LOCAL/PF_LOCAL.
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| 5 | *
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| 6 | * This is used by the Samba autoconf scripts to detect systems which
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| 7 | * don't have Unix-domain sockets, such as (probably) VMS, or systems
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| 8 | * on which they are broken under some conditions, such as RedHat 7.0
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| 9 | * (unpatched). We can't build WinBind there at the moment.
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| 10 | *
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| 11 | * Coding standard says to always use exit() for this, not return, so
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| 12 | * we do.
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| 13 | *
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| 14 | * Martin Pool <mbp@samba.org>, June 2000. */
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| 15 |
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| 16 | /* TODO: Look for AF_LOCAL (most standard), AF_UNIX, and AF_FILE. */
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| 17 |
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| 18 | #include <stdio.h>
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| 19 |
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| 20 | #ifdef HAVE_SYS_SOCKET_H
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| 21 | # include <sys/socket.h>
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| 22 | #endif
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| 23 |
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| 24 | #ifdef HAVE_SYS_UN_H
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| 25 | # include <sys/un.h>
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| 26 | #endif
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| 27 |
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| 28 | #ifdef HAVE_SYS_TYPES_H
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| 29 | # include <sys/types.h>
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| 30 | #endif
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| 31 |
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| 32 | #if HAVE_SYS_WAIT_H
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| 33 | # include <sys/wait.h>
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| 34 | #endif
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| 35 |
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| 36 | #if HAVE_ERRNO_DECL
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| 37 | # include <errno.h>
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| 38 | #else
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| 39 | extern int errno;
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| 40 | #endif
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| 41 |
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| 42 | static int bind_socket(char const *filename)
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| 43 | {
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| 44 | int sock_fd;
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| 45 | struct sockaddr_un name;
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| 46 | size_t size;
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| 47 |
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| 48 | /* Create the socket. */
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| 49 | if ((sock_fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
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| 50 | perror ("socket(PF_LOCAL, SOCK_STREAM)");
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| 51 | exit(1);
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| 52 | }
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| 53 |
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| 54 | /* Bind a name to the socket. */
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| 55 | name.sun_family = AF_LOCAL;
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| 56 | strncpy(name.sun_path, filename, sizeof (name.sun_path));
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| 57 |
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| 58 | /* The size of the address is
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| 59 | the offset of the start of the filename,
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| 60 | plus its length,
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| 61 | plus one for the terminating null byte.
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| 62 | Alternatively you can just do:
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| 63 | size = SUN_LEN (&name);
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| 64 | */
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| 65 | size = SUN_LEN(&name);
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| 66 | /* XXX: This probably won't work on unfriendly libcs */
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| 67 |
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| 68 | if (bind(sock_fd, (struct sockaddr *) &name, size) < 0) {
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| 69 | perror ("bind");
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| 70 | exit(1);
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| 71 | }
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| 72 |
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| 73 | return sock_fd;
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| 74 | }
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| 75 |
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| 76 |
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| 77 | int main(void)
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| 78 | {
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| 79 | int sock_fd;
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| 80 | int kid;
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| 81 | char const *filename = "conftest.unixsock.sock";
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| 82 |
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| 83 | /* abolish hanging */
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| 84 | alarm(15); /* secs */
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| 85 |
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| 86 | if ((sock_fd = bind_socket(filename)) < 0)
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| 87 | exit(1);
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| 88 |
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| 89 | /* the socket will be deleted when autoconf cleans up these
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| 90 | files. */
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| 91 |
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| 92 | exit(0);
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| 93 | }
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