Annotation of src/usr.bin/cvs/sock.c, Revision 1.7
1.1 jfb 1: /* $OpenBSD$ */
2: /*
3: * Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org>
4: * All rights reserved.
5: *
6: * Redistribution and use in source and binary forms, with or without
7: * modification, are permitted provided that the following conditions
8: * are met:
9: *
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. The name of the author may not be used to endorse or promote products
13: * derived from this software without specific prior written permission.
14: *
15: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
16: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
17: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
18: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: #include <sys/types.h>
28: #include <sys/socket.h>
29: #include <sys/un.h>
30:
31: #include <poll.h>
32: #include <stdlib.h>
33: #include <stdio.h>
34: #include <unistd.h>
35: #include <errno.h>
36: #include <string.h>
37:
38: #include "log.h"
39: #include "sock.h"
40: #include "cvsd.h"
41: #include "event.h"
42:
43:
44: volatile sig_atomic_t cvs_sock_doloop;
45:
46:
47: char *cvsd_sock_path = CVSD_SOCK_PATH;
48:
49:
50:
51: /* daemon API */
1.4 jfb 52: #ifdef CVSD
1.2 jfb 53: int cvsd_sock = -1;
1.1 jfb 54: static struct sockaddr_un cvsd_sun;
1.4 jfb 55: #endif
1.1 jfb 56:
57: /* for client API */
1.4 jfb 58: #ifdef CVS
1.1 jfb 59: static int cvs_sock = -1;
60: static struct sockaddr_un cvs_sun;
1.4 jfb 61: #endif
1.1 jfb 62:
63:
1.3 jfb 64: #ifdef CVSD
1.1 jfb 65: /*
66: * cvsd_sock_open()
67: *
1.2 jfb 68: * Open the daemon's local socket. If the server socket is already opened,
69: * we close it before reopening it.
70: * Returns 0 on success, -1 on failure.
1.1 jfb 71: */
72:
73: int
74: cvsd_sock_open(void)
75: {
1.4 jfb 76: if (cvsd_sock >= 0)
1.2 jfb 77: cvsd_sock_close();
78:
1.1 jfb 79: cvsd_sun.sun_family = AF_LOCAL;
80: strlcpy(cvsd_sun.sun_path, cvsd_sock_path, sizeof(cvsd_sun.sun_path));
81:
82: cvsd_sock = socket(AF_LOCAL, SOCK_STREAM, 0);
83: if (cvsd_sock == -1) {
84: cvs_log(LP_ERRNO, "failed to open socket");
85: return (-1);
86: }
87:
88: if (bind(cvsd_sock, (struct sockaddr *)&cvsd_sun,
89: SUN_LEN(&cvsd_sun)) == -1) {
90: cvs_log(LP_ERRNO, "failed to bind local socket to `%s'",
91: cvsd_sock_path);
92: (void)close(cvsd_sock);
93: return (-1);
94: }
95:
1.5 jfb 96: (void)listen(cvsd_sock, 10);
97:
98: if (chown(cvsd_sock_path, getuid(), cvsd_gid) == -1) {
99: cvs_log(LP_ERRNO, "failed to change owner of `%s'",
100: cvsd_sock_path);
101: (void)close(cvsd_sock);
102: (void)unlink(cvsd_sock_path);
103: return (-1);
104: }
1.1 jfb 105:
106: if (chmod(cvsd_sock_path, CVSD_SOCK_PERMS) == -1) {
107: cvs_log(LP_ERRNO, "failed to change mode of `%s'",
108: cvsd_sock_path);
109: (void)close(cvsd_sock);
110: (void)unlink(cvsd_sock_path);
111: return (-1);
112: }
113:
114: cvs_log(LP_DEBUG, "opened local socket `%s'", cvsd_sock_path);
115:
116: return (0);
117: }
118:
119:
120: /*
121: * cvsd_sock_close()
122: *
123: * Close the local socket.
124: */
125:
126: void
127: cvsd_sock_close(void)
128: {
129: cvs_log(LP_DEBUG, "closing local socket `%s'", CVSD_SOCK_PATH);
130: if (close(cvsd_sock) == -1) {
131: cvs_log(LP_ERRNO, "failed to close local socket");
132: }
1.6 jfb 133: if (seteuid(0) == -1)
134: cvs_log(LP_ERRNO, "failed to regain privileges");
135: else if (unlink(cvsd_sock_path) == -1)
1.1 jfb 136: cvs_log(LP_ERRNO, "failed to unlink local socket `%s'",
1.2 jfb 137: cvsd_sock_path);
1.1 jfb 138: }
139:
140:
141: /*
1.2 jfb 142: * cvsd_sock_accept()
1.1 jfb 143: *
1.2 jfb 144: * Handler for connections made on the server's local domain socket.
145: * It accepts connections and looks for a child process that is currently
146: * idle to which it can dispatch the connection's descriptor. If there are
147: * no available child processes, a new one will be created unless the number
148: * of children has attained the maximum.
1.1 jfb 149: */
150:
1.2 jfb 151: int
152: cvsd_sock_accept(int fd)
1.1 jfb 153: {
1.2 jfb 154: int cfd;
1.1 jfb 155: socklen_t slen;
156: struct sockaddr_un sun;
157:
1.2 jfb 158: slen = sizeof(sun);
159: cfd = accept(fd, (struct sockaddr *)&sun, &slen);
160: if (cfd == -1) {
161: cvs_log(LP_ERRNO, "failed to accept client connection");
1.1 jfb 162: return (-1);
163: }
164:
1.7 ! krapht 165: return (cfd);
1.1 jfb 166: }
1.3 jfb 167: #endif
1.1 jfb 168:
1.3 jfb 169: #ifdef CVS
1.1 jfb 170: /*
171: * cvs_sock_connect()
172: *
173: * Open a connection to the CVS server's local socket.
174: */
175:
176: int
1.3 jfb 177: cvs_sock_connect(const char *path)
1.1 jfb 178: {
179: cvs_sun.sun_family = AF_LOCAL;
1.3 jfb 180: strlcpy(cvs_sun.sun_path, path, sizeof(cvs_sun.sun_path));
1.1 jfb 181:
182: cvs_log(LP_INFO, "connecting to CVS server socket `%s'",
183: cvs_sun.sun_path);
184:
185: cvs_sock = socket(AF_LOCAL, SOCK_STREAM, 0);
186: if (cvs_sock == -1) {
187: cvs_log(LP_ERRNO, "failed to open local socket");
188: return (-1);
189: }
190:
191: if (connect(cvs_sock, (struct sockaddr *)&cvs_sun,
192: SUN_LEN(&cvs_sun)) == -1) {
193: cvs_log(LP_ERRNO, "failed to connect to server socket `%s'",
194: cvs_sun.sun_path);
195: (void)close(cvs_sock);
196: return (-1);
197: }
198:
199: return (0);
200: }
201:
202:
203: /*
204: * cvs_sock_disconnect()
205: *
206: * Disconnect from the open socket to the CVS server.
207: */
208:
209: void
210: cvs_sock_disconnect(void)
211: {
212: if (close(cvs_sock) == -1)
213: cvs_log(LP_ERRNO, "failed to close local socket");
214: }
1.3 jfb 215: #endif
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