Annotation of src/usr.bin/cvs/proto.c, Revision 1.78
1.78 ! xsa 1: /* $OpenBSD: proto.c,v 1.77 2005/09/05 19:31:21 xsa Exp $ */
1.1 jfb 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: * CVS client/server protocol
28: * ==========================
29: *
30: * The following code implements the CVS client/server protocol, which is
31: * documented at the following URL:
1.72 joris 32: * http://www.iam.unibe.ch/~til/documentation/cvs/cvsclient_toc.html
33: * http://www.elegosoft.com/cvs/cvsclient_toc.html
1.1 jfb 34: *
35: * The protocol is split up into two parts; the first part is the client side
36: * of things and is composed of all the response handlers, which are all named
37: * with a prefix of "cvs_resp_". The second part is the set of request
38: * handlers used by the server. These handlers process the request and
39: * generate the appropriate response to send back. The prefix for request
40: * handlers is "cvs_req_".
41: *
42: */
43:
44: #include <sys/types.h>
45: #include <sys/stat.h>
46:
1.56 xsa 47: #include <errno.h>
1.1 jfb 48: #include <fcntl.h>
1.56 xsa 49: #include <libgen.h>
50: #include <pwd.h>
1.1 jfb 51: #include <stdio.h>
52: #include <stdlib.h>
1.56 xsa 53: #include <string.h>
1.1 jfb 54: #include <unistd.h>
55:
56: #include "cvs.h"
57: #include "log.h"
1.13 jfb 58: #include "proto.h"
1.1 jfb 59:
60:
1.11 jfb 61: /* request flags */
1.68 xsa 62: #define CVS_REQF_RESP 0x01
1.11 jfb 63:
64:
1.68 xsa 65: static int cvs_initlog(void);
1.1 jfb 66:
1.18 jfb 67: struct cvs_req cvs_requests[] = {
68: { CVS_REQ_DIRECTORY, "Directory", 0 },
69: { CVS_REQ_MAXDOTDOT, "Max-dotdot", 0 },
70: { CVS_REQ_STATICDIR, "Static-directory", 0 },
71: { CVS_REQ_STICKY, "Sticky", 0 },
72: { CVS_REQ_ENTRY, "Entry", 0 },
73: { CVS_REQ_ENTRYEXTRA, "EntryExtra", 0 },
74: { CVS_REQ_CHECKINTIME, "Checkin-time", 0 },
75: { CVS_REQ_MODIFIED, "Modified", 0 },
76: { CVS_REQ_ISMODIFIED, "Is-modified", 0 },
77: { CVS_REQ_UNCHANGED, "Unchanged", 0 },
78: { CVS_REQ_USEUNCHANGED, "UseUnchanged", 0 },
79: { CVS_REQ_NOTIFY, "Notify", 0 },
80: { CVS_REQ_NOTIFYUSER, "NotifyUser", 0 },
81: { CVS_REQ_QUESTIONABLE, "Questionable", 0 },
82: { CVS_REQ_CASE, "Case", 0 },
83: { CVS_REQ_UTF8, "Utf8", 0 },
84: { CVS_REQ_ARGUMENT, "Argument", 0 },
85: { CVS_REQ_ARGUMENTX, "Argumentx", 0 },
86: { CVS_REQ_GLOBALOPT, "Global_option", 0 },
87: { CVS_REQ_GZIPSTREAM, "Gzip-stream", 0 },
88: { CVS_REQ_READCVSRC2, "read-cvsrc2", 0 },
89: { CVS_REQ_READWRAP, "read-cvswrappers", 0 },
90: { CVS_REQ_READIGNORE, "read-cvsignore", 0 },
91: { CVS_REQ_ERRIFREADER, "Error-If-Reader", 0 },
92: { CVS_REQ_VALIDRCSOPT, "Valid-RcsOptions", 0 },
93: { CVS_REQ_SET, "Set", 0 },
94: { CVS_REQ_XPANDMOD, "expand-modules", CVS_REQF_RESP },
1.26 jfb 95: { CVS_REQ_LOG, "log", CVS_REQF_RESP },
1.18 jfb 96: { CVS_REQ_CO, "co", CVS_REQF_RESP },
97: { CVS_REQ_EXPORT, "export", CVS_REQF_RESP },
1.26 jfb 98: { CVS_REQ_ANNOTATE, "annotate", CVS_REQF_RESP },
99: { CVS_REQ_RDIFF, "rdiff", CVS_REQF_RESP },
1.18 jfb 100: { CVS_REQ_RTAG, "rtag", CVS_REQF_RESP },
101: { CVS_REQ_INIT, "init", CVS_REQF_RESP },
102: { CVS_REQ_STATUS, "status", CVS_REQF_RESP },
103: { CVS_REQ_UPDATE, "update", CVS_REQF_RESP },
1.26 jfb 104: { CVS_REQ_HISTORY, "history", CVS_REQF_RESP },
1.18 jfb 105: { CVS_REQ_IMPORT, "import", CVS_REQF_RESP },
106: { CVS_REQ_ADD, "add", CVS_REQF_RESP },
107: { CVS_REQ_REMOVE, "remove", CVS_REQF_RESP },
108: { CVS_REQ_RELEASE, "release", CVS_REQF_RESP },
109: { CVS_REQ_ROOT, "Root", 0 },
110: { CVS_REQ_VALIDRESP, "Valid-responses", 0 },
111: { CVS_REQ_VALIDREQ, "valid-requests", CVS_REQF_RESP },
112: { CVS_REQ_VERSION, "version", CVS_REQF_RESP },
113: { CVS_REQ_NOOP, "noop", CVS_REQF_RESP },
114: { CVS_REQ_DIFF, "diff", CVS_REQF_RESP },
1.29 jfb 115: { CVS_REQ_CI, "ci", CVS_REQF_RESP },
1.35 jfb 116: { CVS_REQ_TAG, "tag", CVS_REQF_RESP },
1.41 joris 117: { CVS_REQ_ADMIN, "admin", CVS_REQF_RESP },
1.76 xsa 118: { CVS_REQ_WATCHERS, "watchers", CVS_REQF_RESP },
1.78 ! xsa 119: { CVS_REQ_EDITORS, "editors", CVS_REQF_RESP },
1.1 jfb 120: };
121:
1.18 jfb 122: struct cvs_resp cvs_responses[] = {
123: { CVS_RESP_OK, "ok" },
124: { CVS_RESP_ERROR, "error" },
125: { CVS_RESP_VALIDREQ, "Valid-requests" },
126: { CVS_RESP_M, "M" },
127: { CVS_RESP_MBINARY, "Mbinary" },
128: { CVS_RESP_MT, "MT" },
129: { CVS_RESP_E, "E" },
130: { CVS_RESP_F, "F" },
131: { CVS_RESP_CREATED, "Created" },
132: { CVS_RESP_UPDATED, "Updated" },
133: { CVS_RESP_UPDEXIST, "Update-existing" },
134: { CVS_RESP_MERGED, "Merged" },
135: { CVS_RESP_REMOVED, "Removed" },
1.63 joris 136: { CVS_RESP_RMENTRY, "Remove-entry" },
1.18 jfb 137: { CVS_RESP_CKSUM, "Checksum" },
138: { CVS_RESP_CLRSTATDIR, "Clear-static-directory" },
139: { CVS_RESP_SETSTATDIR, "Set-static-directory" },
140: { CVS_RESP_NEWENTRY, "New-entry" },
141: { CVS_RESP_CHECKEDIN, "Checked-in" },
142: { CVS_RESP_MODE, "Mode" },
143: { CVS_RESP_MODTIME, "Mod-time" },
144: { CVS_RESP_MODXPAND, "Module-expansion" },
145: { CVS_RESP_SETSTICKY, "Set-sticky" },
146: { CVS_RESP_CLRSTICKY, "Clear-sticky" },
147: { CVS_RESP_RCSDIFF, "Rcs-diff" },
148: { CVS_RESP_TEMPLATE, "Template" },
1.34 jfb 149: { CVS_RESP_COPYFILE, "Copy-file" },
1.1 jfb 150: };
151:
1.68 xsa 152: #define CVS_NBREQ (sizeof(cvs_requests)/sizeof(cvs_requests[0]))
153: #define CVS_NBRESP (sizeof(cvs_responses)/sizeof(cvs_responses[0]))
1.17 jfb 154:
155: /* hack to receive the remote version without outputting it */
1.18 jfb 156: u_int cvs_version_sent = 0;
1.17 jfb 157:
1.13 jfb 158: static char cvs_proto_buf[4096];
159:
160: /*
1.37 david 161: * Output files for protocol logging when the CVS_CLIENT_LOG environment
1.13 jfb 162: * variable is set.
163: */
164: static int cvs_server_logon = 0;
165: static FILE *cvs_server_inlog = NULL;
166: static FILE *cvs_server_outlog = NULL;
167:
1.28 jfb 168: static pid_t cvs_subproc_pid;
169:
1.32 jfb 170: /* last directory sent with cvs_senddir() */
171: static char cvs_lastdir[MAXPATHLEN] = "";
172:
1.13 jfb 173:
174: /*
175: * cvs_connect()
176: *
177: * Open a client connection to the cvs server whose address is given in
178: * the <root> variable. The method used to connect depends on the
179: * setting of the CVS_RSH variable.
1.17 jfb 180: * Once the connection has been established, we first send the list of
181: * responses we support and request the list of supported requests from the
182: * server. Then, a version request is sent and various global flags are sent.
1.13 jfb 183: * Returns 0 on success, or -1 on failure.
184: */
185: int
186: cvs_connect(struct cvsroot *root)
187: {
1.20 jfb 188: int argc, infd[2], outfd[2], errfd[2];
1.71 xsa 189: char *argv[16], *cvs_server_cmd, tmsg[1024], *vresp;
1.13 jfb 190:
1.36 jfb 191: if (root->cr_method == CVS_METHOD_PSERVER) {
192: cvs_log(LP_ERR, "no pserver support due to security issues");
193: return (-1);
194: } else if ((root->cr_method == CVS_METHOD_KSERVER) ||
195: (root->cr_method == CVS_METHOD_GSERVER) ||
196: (root->cr_method == CVS_METHOD_EXT) ||
197: (root->cr_method == CVS_METHOD_FORK)) {
198: cvs_log(LP_ERR, "connection method not supported yet");
199: return (-1);
200: }
1.33 jfb 201:
202: if (root->cr_flags & CVS_ROOT_CONNECTED) {
203: cvs_log(LP_NOTICE, "already connected to CVSROOT");
204: return (0);
205: }
206:
1.13 jfb 207: if (pipe(infd) == -1) {
208: cvs_log(LP_ERRNO,
209: "failed to create input pipe for client connection");
210: return (-1);
211: }
212:
213: if (pipe(outfd) == -1) {
214: cvs_log(LP_ERRNO,
215: "failed to create output pipe for client connection");
216: (void)close(infd[0]);
217: (void)close(infd[1]);
218: return (-1);
219: }
220:
1.20 jfb 221: if (pipe(errfd) == -1) {
222: cvs_log(LP_ERRNO,
223: "failed to create error pipe for client connection");
224: (void)close(infd[0]);
225: (void)close(infd[1]);
226: (void)close(outfd[0]);
227: (void)close(outfd[1]);
228: return (-1);
229: }
230:
1.28 jfb 231: cvs_subproc_pid = fork();
232: if (cvs_subproc_pid == -1) {
1.13 jfb 233: cvs_log(LP_ERRNO, "failed to fork for cvs server connection");
234: return (-1);
1.30 deraadt 235: } else if (cvs_subproc_pid == 0) {
1.13 jfb 236: if ((dup2(infd[0], STDIN_FILENO) == -1) ||
1.23 jfb 237: (dup2(outfd[1], STDOUT_FILENO) == -1)) {
1.13 jfb 238: cvs_log(LP_ERRNO,
239: "failed to setup standard streams for cvs server");
240: return (-1);
241: }
242: (void)close(infd[1]);
243: (void)close(outfd[0]);
1.20 jfb 244: (void)close(errfd[0]);
1.13 jfb 245:
246: argc = 0;
247: argv[argc++] = cvs_rsh;
248:
249: if (root->cr_user != NULL) {
250: argv[argc++] = "-l";
251: argv[argc++] = root->cr_user;
252: }
253:
254: cvs_server_cmd = getenv("CVS_SERVER");
255: if (cvs_server_cmd == NULL)
1.20 jfb 256: cvs_server_cmd = CVS_SERVER_DEFAULT;
1.13 jfb 257:
258: argv[argc++] = root->cr_host;
259: argv[argc++] = cvs_server_cmd;
260: argv[argc++] = "server";
261: argv[argc] = NULL;
1.71 xsa 262:
263: if (cvs_trace == 1) {
264: tmsg[0] = '\0';
265: for (argc = 0; argv[argc] != NULL; argc++) {
266: strlcat(tmsg, argv[argc], sizeof(tmsg));
267: strlcat(tmsg, " ", sizeof(tmsg));
268: }
269: }
270: cvs_log(LP_TRACE, "Starting server: %s", tmsg);
1.13 jfb 271:
272: execvp(argv[0], argv);
273: cvs_log(LP_ERRNO, "failed to exec");
1.73 xsa 274: exit(CVS_EX_PROTO);
1.13 jfb 275: }
276:
277: /* we are the parent */
278: (void)close(infd[0]);
279: (void)close(outfd[1]);
1.20 jfb 280: (void)close(errfd[1]);
1.13 jfb 281:
282: root->cr_srvin = fdopen(infd[1], "w");
283: if (root->cr_srvin == NULL) {
284: cvs_log(LP_ERRNO, "failed to create pipe stream");
285: return (-1);
286: }
287:
288: root->cr_srvout = fdopen(outfd[0], "r");
289: if (root->cr_srvout == NULL) {
290: cvs_log(LP_ERRNO, "failed to create pipe stream");
1.20 jfb 291: return (-1);
292: }
293:
1.13 jfb 294: /* make the streams line-buffered */
1.75 xsa 295: (void)setvbuf(root->cr_srvin, NULL, _IOLBF, (size_t)0);
296: (void)setvbuf(root->cr_srvout, NULL, _IOLBF, (size_t)0);
1.13 jfb 297:
298: cvs_initlog();
299:
300: /*
301: * Send the server the list of valid responses, then ask for valid
302: * requests.
303: */
304:
1.40 jfb 305: if ((vresp = cvs_resp_getvalid()) == NULL) {
1.13 jfb 306: cvs_log(LP_ERR, "can't generate list of valid responses");
307: return (-1);
308: }
309:
310: if (cvs_sendreq(root, CVS_REQ_VALIDRESP, vresp) < 0) {
1.40 jfb 311: cvs_log(LP_ERR, "failed to get valid responses");
312: free(vresp);
313: return (-1);
1.13 jfb 314: }
315: free(vresp);
316:
317: if (cvs_sendreq(root, CVS_REQ_VALIDREQ, NULL) < 0) {
318: cvs_log(LP_ERR, "failed to get valid requests from server");
319: return (-1);
320: }
321:
1.62 xsa 322: /* send the CVSROOT to the server */
323: if (cvs_sendreq(root, CVS_REQ_ROOT, root->cr_dir) < 0)
1.54 joris 324: return (-1);
325:
1.40 jfb 326: /* don't fail if this request doesn't work */
1.17 jfb 327: if (cvs_sendreq(root, CVS_REQ_VERSION, NULL) < 0)
1.40 jfb 328: cvs_log(LP_WARN, "failed to get remote version");
1.17 jfb 329:
1.13 jfb 330: /* now share our global options with the server */
1.61 joris 331: if ((verbosity <= 1) &&
1.40 jfb 332: (cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-q") < 0))
333: return (-1);
1.61 joris 334: if ((verbosity == 0) &&
1.40 jfb 335: (cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-Q") < 0))
336: return (-1);
337:
1.66 xsa 338: if ((cvs_noexec == 1) &&
339: (cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-n") < 0))
1.53 jfb 340: return (-1);
1.66 xsa 341: if ((cvs_nolog == 1) &&
342: (cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-l") < 0))
1.40 jfb 343: return (-1);
1.66 xsa 344: if ((cvs_readonly == 1) &&
345: (cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-r") < 0))
1.40 jfb 346: return (-1);
1.66 xsa 347: if ((cvs_trace == 1) &&
348: (cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-t") < 0))
1.13 jfb 349: return (-1);
350:
351: /* not sure why, but we have to send this */
352: if (cvs_sendreq(root, CVS_REQ_USEUNCHANGED, NULL) < 0)
353: return (-1);
354:
355: cvs_log(LP_DEBUG, "connected to %s", root->cr_host);
356:
1.33 jfb 357: root->cr_flags |= CVS_ROOT_CONNECTED;
358:
1.13 jfb 359: return (0);
360: }
361:
362:
363: /*
364: * cvs_disconnect()
365: *
366: * Disconnect from the cvs server.
367: */
368: void
369: cvs_disconnect(struct cvsroot *root)
370: {
1.33 jfb 371: if (!(root->cr_flags & CVS_ROOT_CONNECTED))
372: return;
373:
1.13 jfb 374: cvs_log(LP_DEBUG, "closing connection to %s", root->cr_host);
375: if (root->cr_srvin != NULL) {
376: (void)fclose(root->cr_srvin);
377: root->cr_srvin = NULL;
378: }
379: if (root->cr_srvout != NULL) {
380: (void)fclose(root->cr_srvout);
381: root->cr_srvout = NULL;
382: }
1.33 jfb 383:
384: root->cr_flags &= ~CVS_ROOT_CONNECTED;
1.13 jfb 385: }
386:
1.1 jfb 387:
388: /*
389: * cvs_req_getbyid()
390: *
391: */
1.13 jfb 392: struct cvs_req*
1.1 jfb 393: cvs_req_getbyid(int reqid)
394: {
395: u_int i;
396:
397: for (i = 0; i < CVS_NBREQ; i++)
398: if (cvs_requests[i].req_id == reqid)
1.13 jfb 399: return &(cvs_requests[i]);
1.31 tedu 400:
1.1 jfb 401: return (NULL);
402: }
403:
404:
405: /*
406: * cvs_req_getbyname()
407: */
1.13 jfb 408: struct cvs_req*
1.1 jfb 409: cvs_req_getbyname(const char *rname)
410: {
411: u_int i;
412:
413: for (i = 0; i < CVS_NBREQ; i++)
414: if (strcmp(cvs_requests[i].req_str, rname) == 0)
1.13 jfb 415: return &(cvs_requests[i]);
1.1 jfb 416:
1.13 jfb 417: return (NULL);
1.1 jfb 418: }
419:
420:
421: /*
422: * cvs_req_getvalid()
423: *
424: * Build a space-separated list of all the requests that this protocol
425: * implementation supports.
426: */
1.67 xsa 427: char *
1.1 jfb 428: cvs_req_getvalid(void)
429: {
430: u_int i;
431: size_t len;
432: char *vrstr;
433: BUF *buf;
434:
1.75 xsa 435: buf = cvs_buf_alloc((size_t)512, BUF_AUTOEXT);
1.1 jfb 436: if (buf == NULL)
437: return (NULL);
438:
439: cvs_buf_set(buf, cvs_requests[0].req_str,
1.75 xsa 440: strlen(cvs_requests[0].req_str), (size_t)0);
1.1 jfb 441:
442: for (i = 1; i < CVS_NBREQ; i++) {
443: if ((cvs_buf_putc(buf, ' ') < 0) ||
444: (cvs_buf_append(buf, cvs_requests[i].req_str,
445: strlen(cvs_requests[i].req_str)) < 0)) {
446: cvs_buf_free(buf);
447: return (NULL);
448: }
449: }
450:
451: /* NUL-terminate */
452: if (cvs_buf_putc(buf, '\0') < 0) {
453: cvs_buf_free(buf);
454: return (NULL);
455: }
456:
1.70 moritz 457: len = cvs_buf_len(buf);
1.1 jfb 458: vrstr = (char *)malloc(len);
1.27 jfb 459: if (vrstr == NULL) {
460: cvs_buf_free(buf);
461: return (NULL);
462: }
1.1 jfb 463:
1.75 xsa 464: cvs_buf_copy(buf, (size_t)0, vrstr, len);
1.1 jfb 465: cvs_buf_free(buf);
466:
467: return (vrstr);
468: }
469:
470:
471: /*
472: * cvs_resp_getbyid()
473: *
474: */
1.13 jfb 475: struct cvs_resp*
1.1 jfb 476: cvs_resp_getbyid(int respid)
477: {
478: u_int i;
479:
1.44 tedu 480: for (i = 0; i < CVS_NBRESP; i++)
1.13 jfb 481: if (cvs_responses[i].resp_id == (u_int)respid)
482: return &(cvs_responses[i]);
1.31 tedu 483:
1.1 jfb 484: return (NULL);
485: }
486:
487:
488: /*
489: * cvs_resp_getbyname()
490: */
1.67 xsa 491: struct cvs_resp *
1.1 jfb 492: cvs_resp_getbyname(const char *rname)
493: {
494: u_int i;
495:
1.44 tedu 496: for (i = 0; i < CVS_NBRESP; i++)
1.1 jfb 497: if (strcmp(cvs_responses[i].resp_str, rname) == 0)
1.13 jfb 498: return &(cvs_responses[i]);
1.1 jfb 499:
1.13 jfb 500: return (NULL);
1.1 jfb 501: }
502:
503:
504: /*
505: * cvs_resp_getvalid()
506: *
507: * Build a space-separated list of all the responses that this protocol
508: * implementation supports.
509: */
1.67 xsa 510: char *
1.1 jfb 511: cvs_resp_getvalid(void)
512: {
513: u_int i;
514: size_t len;
515: char *vrstr;
516: BUF *buf;
517:
1.75 xsa 518: buf = cvs_buf_alloc((size_t)512, BUF_AUTOEXT);
1.1 jfb 519: if (buf == NULL)
520: return (NULL);
521:
522: cvs_buf_set(buf, cvs_responses[0].resp_str,
1.75 xsa 523: strlen(cvs_responses[0].resp_str), (size_t)0);
1.1 jfb 524:
525: for (i = 1; i < CVS_NBRESP; i++) {
526: if ((cvs_buf_putc(buf, ' ') < 0) ||
527: (cvs_buf_append(buf, cvs_responses[i].resp_str,
528: strlen(cvs_responses[i].resp_str)) < 0)) {
529: cvs_buf_free(buf);
530: return (NULL);
531: }
532: }
533:
534: /* NUL-terminate */
535: if (cvs_buf_putc(buf, '\0') < 0) {
536: cvs_buf_free(buf);
537: return (NULL);
538: }
539:
1.70 moritz 540: len = cvs_buf_len(buf);
1.1 jfb 541: vrstr = (char *)malloc(len);
1.27 jfb 542: if (vrstr == NULL) {
543: cvs_buf_free(buf);
544: return (NULL);
545: }
1.1 jfb 546:
1.75 xsa 547: cvs_buf_copy(buf, (size_t)0, vrstr, len);
1.1 jfb 548: cvs_buf_free(buf);
549:
550: return (vrstr);
551: }
552:
553:
554: /*
555: * cvs_sendfile()
556: *
557: * Send the mode and size of a file followed by the file's contents.
558: * Returns 0 on success, or -1 on failure.
559: */
560: int
1.13 jfb 561: cvs_sendfile(struct cvsroot *root, const char *path)
1.1 jfb 562: {
1.51 xsa 563: int fd, l;
1.1 jfb 564: ssize_t ret;
565: char buf[4096];
566: struct stat st;
567:
1.38 jfb 568: cvs_log(LP_TRACE, "Sending file `%s' to server", basename(path));
569:
1.1 jfb 570: if (stat(path, &st) == -1) {
571: cvs_log(LP_ERRNO, "failed to stat `%s'", path);
572: return (-1);
573: }
574:
1.24 jfb 575: if (cvs_modetostr(st.st_mode, buf, sizeof(buf)) < 0)
576: return (-1);
577:
1.1 jfb 578: fd = open(path, O_RDONLY, 0);
579: if (fd == -1) {
1.38 jfb 580: cvs_log(LP_ERRNO, "failed to open `%s'", path);
1.1 jfb 581: return (-1);
582: }
583:
1.38 jfb 584: if (cvs_sendln(root, buf) < 0) {
585: (void)close(fd);
586: return (-1);
587: }
1.51 xsa 588: l = snprintf(buf, sizeof(buf), "%lld\n", st.st_size);
589: if (l == -1 || l >= (int)sizeof(buf))
590: return (-1);
591:
1.38 jfb 592: if (cvs_sendln(root, buf) < 0) {
593: (void)close(fd);
594: return (-1);
595: }
1.1 jfb 596:
597: while ((ret = read(fd, buf, sizeof(buf))) != 0) {
598: if (ret == -1) {
1.24 jfb 599: (void)close(fd);
1.1 jfb 600: cvs_log(LP_ERRNO, "failed to read file `%s'", path);
601: return (-1);
602: }
603:
1.38 jfb 604: if (cvs_sendraw(root, buf, (size_t)ret) < 0) {
605: (void)close(fd);
606: return (-1);
607: }
1.1 jfb 608: }
609:
610: (void)close(fd);
611: return (0);
612: }
613:
614:
615: /*
616: * cvs_recvfile()
617: *
618: * Receive the mode and size of a file followed the file's contents and
619: * create or update the file whose path is <path> with the received
620: * information.
621: */
1.14 jfb 622: BUF*
623: cvs_recvfile(struct cvsroot *root, mode_t *mode)
1.1 jfb 624: {
625: size_t len;
626: ssize_t ret;
627: off_t fsz, cnt;
628: char buf[4096], *ep;
1.14 jfb 629: BUF *fbuf;
630:
631: fbuf = cvs_buf_alloc(sizeof(buf), BUF_AUTOEXT);
632: if (fbuf == NULL)
633: return (NULL);
1.1 jfb 634:
1.13 jfb 635: if ((cvs_getln(root, buf, sizeof(buf)) < 0) ||
1.14 jfb 636: (cvs_strtomode(buf, mode) < 0)) {
1.44 tedu 637: cvs_buf_free(fbuf);
1.14 jfb 638: return (NULL);
1.1 jfb 639: }
640:
1.50 joris 641: if (cvs_getln(root, buf, sizeof(buf)) < 0) {
642: cvs_buf_free(fbuf);
643: return (NULL);
644: }
1.1 jfb 645:
646: fsz = (off_t)strtol(buf, &ep, 10);
647: if (*ep != '\0') {
648: cvs_log(LP_ERR, "parse error in file size transmission");
1.44 tedu 649: cvs_buf_free(fbuf);
1.14 jfb 650: return (NULL);
1.1 jfb 651: }
652:
653: cnt = 0;
654: do {
655: len = MIN(sizeof(buf), (size_t)(fsz - cnt));
1.6 jfb 656: if (len == 0)
657: break;
1.13 jfb 658: ret = cvs_recvraw(root, buf, len);
1.1 jfb 659: if (ret == -1) {
1.14 jfb 660: cvs_buf_free(fbuf);
661: return (NULL);
1.1 jfb 662: }
663:
1.14 jfb 664: if (cvs_buf_append(fbuf, buf, (size_t)ret) == -1) {
665: cvs_log(LP_ERR,
666: "failed to append received file data");
667: cvs_buf_free(fbuf);
668: return (NULL);
1.1 jfb 669: }
670:
671: cnt += (off_t)ret;
672: } while (cnt < fsz);
673:
1.14 jfb 674: return (fbuf);
1.1 jfb 675: }
1.12 jfb 676:
677: /*
678: * cvs_sendreq()
679: *
680: * Send a request to the server of type <rid>, with optional arguments
681: * contained in <arg>, which should not be terminated by a newline.
682: * Returns 0 on success, or -1 on failure.
683: */
684: int
1.13 jfb 685: cvs_sendreq(struct cvsroot *root, u_int rid, const char *arg)
1.12 jfb 686: {
1.51 xsa 687: int ret, l;
1.13 jfb 688: struct cvs_req *req;
1.12 jfb 689:
690: if (root->cr_srvin == NULL) {
1.36 jfb 691: cvs_log(LP_ERR, "cannot send request %u: Not connected", rid);
1.12 jfb 692: return (-1);
693: }
694:
1.13 jfb 695: req = cvs_req_getbyid(rid);
696: if (req == NULL) {
1.12 jfb 697: cvs_log(LP_ERR, "unsupported request type %u", rid);
698: return (-1);
699: }
700:
1.18 jfb 701: /* is this request supported by the server? */
702: if (!CVS_GETVR(root, req->req_id)) {
1.57 joris 703: if (rid == CVS_REQ_VERSION) {
704: ret = cvs_sendreq(root, CVS_REQ_NOOP, arg);
705: } else {
706: cvs_log(LP_WARN,
707: "remote end does not support request `%s'",
708: req->req_str);
709: ret = -1;
710: }
711: return (ret);
1.18 jfb 712: }
713:
1.51 xsa 714: l = snprintf(cvs_proto_buf, sizeof(cvs_proto_buf), "%s%s%s\n",
1.13 jfb 715: req->req_str, (arg == NULL) ? "" : " ", (arg == NULL) ? "" : arg);
1.51 xsa 716: if (l == -1 || l >= (int)sizeof(cvs_proto_buf))
717: return (-1);
1.12 jfb 718:
719: if (cvs_server_inlog != NULL)
1.13 jfb 720: fputs(cvs_proto_buf, cvs_server_inlog);
1.12 jfb 721:
1.13 jfb 722: ret = fputs(cvs_proto_buf, root->cr_srvin);
1.12 jfb 723: if (ret == EOF) {
724: cvs_log(LP_ERRNO, "failed to send request to server");
725: return (-1);
726: }
1.17 jfb 727:
728: if (rid == CVS_REQ_VERSION)
729: cvs_version_sent = 1;
1.12 jfb 730:
1.13 jfb 731: if (req->req_flags & CVS_REQF_RESP)
1.12 jfb 732: ret = cvs_getresp(root);
733:
1.13 jfb 734: return (ret);
1.12 jfb 735: }
736:
737:
738: /*
739: * cvs_getresp()
740: *
741: * Get a response from the server. This call will actually read and handle
742: * responses from the server until one of the response handlers returns
1.37 david 743: * non-zero (either an error occurred or the end of the response was reached).
1.12 jfb 744: * Returns the number of handled commands on success, or -1 on failure.
745: */
746: int
1.13 jfb 747: cvs_getresp(struct cvsroot *root)
1.12 jfb 748: {
1.13 jfb 749: int nbcmd, ret;
750: size_t len;
1.12 jfb 751:
752: nbcmd = 0;
753:
754: do {
755: /* wait for incoming data */
1.74 xsa 756: if (fgets(cvs_proto_buf, (int)sizeof(cvs_proto_buf),
1.12 jfb 757: root->cr_srvout) == NULL) {
758: if (feof(root->cr_srvout))
759: return (0);
760: cvs_log(LP_ERRNO,
761: "failed to read response from server");
762: return (-1);
763: }
764:
765: if (cvs_server_outlog != NULL)
1.13 jfb 766: fputs(cvs_proto_buf, cvs_server_outlog);
1.12 jfb 767:
1.13 jfb 768: if ((len = strlen(cvs_proto_buf)) != 0) {
1.42 joris 769: /* if len - 1 != '\n' the line is truncated */
1.43 joris 770: if (cvs_proto_buf[len - 1] == '\n')
1.13 jfb 771: cvs_proto_buf[--len] = '\0';
1.12 jfb 772: }
773:
1.13 jfb 774: ret = cvs_resp_handle(root, cvs_proto_buf);
1.12 jfb 775: nbcmd++;
776: } while (ret == 0);
777:
778: if (ret > 0)
779: ret = nbcmd;
780: return (ret);
781: }
782:
783:
784: /*
1.13 jfb 785: * cvs_getln()
786: *
1.18 jfb 787: * Get a line from the remote end and store it in <lbuf>. The terminating
1.13 jfb 788: * newline character is stripped from the result.
1.55 jfb 789: * Returns the length in bytes of the line (not including the NUL byte), or
790: * -1 on failure.
1.13 jfb 791: */
792: int
793: cvs_getln(struct cvsroot *root, char *lbuf, size_t len)
794: {
795: size_t rlen;
1.18 jfb 796: FILE *in;
1.13 jfb 797:
1.18 jfb 798: if (cvs_cmdop == CVS_OP_SERVER)
799: in = stdin;
800: else
801: in = root->cr_srvout;
802:
1.74 xsa 803: if (fgets(lbuf, (int)len, in) == NULL) {
1.18 jfb 804: if (ferror(in)) {
805: cvs_log(LP_ERRNO, "failed to read line");
1.13 jfb 806: return (-1);
807: }
808:
1.18 jfb 809: if (feof(in))
1.13 jfb 810: *lbuf = '\0';
811: }
812:
813: if (cvs_server_outlog != NULL)
814: fputs(lbuf, cvs_server_outlog);
815:
816: rlen = strlen(lbuf);
817: if ((rlen > 0) && (lbuf[rlen - 1] == '\n'))
818: lbuf[--rlen] = '\0';
819:
1.55 jfb 820: return (rlen);
1.13 jfb 821: }
822:
1.19 jfb 823:
1.13 jfb 824: /*
1.12 jfb 825: * cvs_sendresp()
826: *
1.19 jfb 827: * Send a response of type <rid> to the client, with optional arguments
1.12 jfb 828: * contained in <arg>, which should not be terminated by a newline.
829: * Returns 0 on success, or -1 on failure.
830: */
831: int
832: cvs_sendresp(u_int rid, const char *arg)
833: {
834: int ret;
1.19 jfb 835: struct cvs_resp *resp;
1.12 jfb 836:
837: resp = cvs_resp_getbyid(rid);
1.13 jfb 838: if (resp == NULL) {
1.12 jfb 839: cvs_log(LP_ERR, "unsupported response type %u", rid);
840: return (-1);
841: }
842:
1.19 jfb 843: ret = fputs(resp->resp_str, stdout);
1.12 jfb 844: if (ret == EOF) {
845: cvs_log(LP_ERRNO, "failed to send response to client");
1.30 deraadt 846: } else {
1.19 jfb 847: if (arg != NULL) {
848: putc(' ', stdout);
849: fputs(arg, stdout);
850: }
1.12 jfb 851: putc('\n', stdout);
852: }
853: return (0);
854: }
855:
856:
1.19 jfb 857: #ifdef notyet
1.12 jfb 858: /*
859: * cvs_getreq()
860: *
861: * Get a request from the client.
862: */
863: int
864: cvs_getreq(void)
865: {
866: int nbcmd;
867:
868: nbcmd = 0;
869:
870: do {
871: /* wait for incoming data */
1.74 xsa 872: if (fgets(cvs_proto_buf, (int)sizeof(cvs_proto_buf),
1.12 jfb 873: stdin) == NULL) {
874: if (feof(stdin))
875: return (0);
876: cvs_log(LP_ERRNO,
877: "failed to read request from client");
878: return (-1);
879: }
880:
1.13 jfb 881: if ((len = strlen(cvs_proto_buf)) != 0) {
882: if (cvs_proto_buf[len - 1] != '\n') {
1.12 jfb 883: /* truncated line */
1.30 deraadt 884: } else
1.13 jfb 885: cvs_proto_buf[--len] = '\0';
1.12 jfb 886: }
887:
1.13 jfb 888: ret = cvs_resp_handle(cvs_proto_buf);
1.12 jfb 889: } while (ret == 0);
890: }
891: #endif
892:
893:
894: /*
895: * cvs_sendln()
896: *
1.18 jfb 897: * Send a single line <line> string to the remote end. The line is sent as is,
1.12 jfb 898: * without any modifications.
899: * Returns 0 on success, or -1 on failure.
900: */
901: int
902: cvs_sendln(struct cvsroot *root, const char *line)
903: {
904: int nl;
905: size_t len;
1.18 jfb 906: FILE *out;
907:
908: if (cvs_cmdop == CVS_OP_SERVER)
909: out = stdout;
910: else
911: out = root->cr_srvin;
1.12 jfb 912:
913: nl = 0;
914: len = strlen(line);
915:
916: if ((len > 0) && (line[len - 1] != '\n'))
917: nl = 1;
918:
919: if (cvs_server_inlog != NULL) {
920: fputs(line, cvs_server_inlog);
921: if (nl)
1.55 jfb 922: putc('\n', cvs_server_inlog);
1.12 jfb 923: }
1.18 jfb 924: fputs(line, out);
1.12 jfb 925: if (nl)
1.55 jfb 926: putc('\n', out);
1.12 jfb 927: return (0);
928: }
929:
930:
931: /*
1.13 jfb 932: * cvs_sendraw()
1.12 jfb 933: *
934: * Send the first <len> bytes from the buffer <src> to the server.
935: */
936: int
1.13 jfb 937: cvs_sendraw(struct cvsroot *root, const void *src, size_t len)
1.12 jfb 938: {
1.18 jfb 939: FILE *out;
940:
941: if (cvs_cmdop == CVS_OP_SERVER)
942: out = stdout;
943: else
944: out = root->cr_srvin;
945:
1.12 jfb 946: if (cvs_server_inlog != NULL)
947: fwrite(src, sizeof(char), len, cvs_server_inlog);
1.18 jfb 948: if (fwrite(src, sizeof(char), len, out) < len) {
1.38 jfb 949: cvs_log(LP_ERR, "failed to send data");
1.12 jfb 950: return (-1);
951: }
952:
953: return (0);
954: }
955:
956:
957: /*
1.13 jfb 958: * cvs_recvraw()
1.12 jfb 959: *
960: * Receive the first <len> bytes from the buffer <src> to the server.
961: */
962: ssize_t
1.13 jfb 963: cvs_recvraw(struct cvsroot *root, void *dst, size_t len)
1.12 jfb 964: {
965: size_t ret;
1.18 jfb 966: FILE *in;
967:
968: if (cvs_cmdop == CVS_OP_SERVER)
969: in = stdin;
970: else
971: in = root->cr_srvout;
1.12 jfb 972:
1.18 jfb 973: ret = fread(dst, sizeof(char), len, in);
1.12 jfb 974: if (ret == 0)
975: return (-1);
976: if (cvs_server_outlog != NULL)
977: fwrite(dst, sizeof(char), len, cvs_server_outlog);
978: return (ssize_t)ret;
979: }
980:
981:
982: /*
1.13 jfb 983: * cvs_senddir()
1.12 jfb 984: *
1.32 jfb 985: * Send a `Directory' request along with the 2 paths that follow it. If
986: * the directory info to be sent is the same as the last info sent, the
987: * call does nothing and simply returns without an error.
1.12 jfb 988: */
989: int
1.31 tedu 990: cvs_senddir(struct cvsroot *root, CVSFILE *dir)
1.12 jfb 991: {
1.60 xsa 992: size_t len;
1.28 jfb 993: char lbuf[MAXPATHLEN], rbuf[MAXPATHLEN];
1.12 jfb 994:
1.47 jfb 995: if (dir->cf_type != DT_DIR)
996: return (-1);
997:
1.32 jfb 998: cvs_file_getpath(dir, lbuf, sizeof(lbuf));
1.45 joris 999: if (strcmp(lbuf, cvs_lastdir) == 0 && cvs_cmdop != CVS_OP_CHECKOUT)
1.32 jfb 1000: return (0);
1001:
1.47 jfb 1002: if (dir->cf_repo == NULL)
1.28 jfb 1003: strlcpy(rbuf, root->cr_dir, sizeof(rbuf));
1.51 xsa 1004: else {
1.60 xsa 1005: len = cvs_path_cat(root->cr_dir, dir->cf_repo, rbuf,
1006: sizeof(rbuf));
1007: if (len >= sizeof(rbuf))
1.51 xsa 1008: return (-1);
1009: }
1.12 jfb 1010:
1.28 jfb 1011:
1012: if ((cvs_sendreq(root, CVS_REQ_DIRECTORY, lbuf) < 0) ||
1013: (cvs_sendln(root, rbuf) < 0))
1.12 jfb 1014: return (-1);
1.32 jfb 1015:
1016: strlcpy(cvs_lastdir, lbuf, sizeof(cvs_lastdir));
1.12 jfb 1017:
1018: return (0);
1019: }
1020:
1021:
1022: /*
1.13 jfb 1023: * cvs_sendarg()
1.12 jfb 1024: *
1025: * Send the argument <arg> to the server. The argument <append> is used to
1026: * determine if the argument should be simply appended to the last argument
1027: * sent or if it should be created as a new argument (0).
1028: */
1029: int
1.13 jfb 1030: cvs_sendarg(struct cvsroot *root, const char *arg, int append)
1.12 jfb 1031: {
1.13 jfb 1032: return cvs_sendreq(root, ((append == 0) ?
1033: CVS_REQ_ARGUMENT : CVS_REQ_ARGUMENTX), arg);
1.12 jfb 1034: }
1035:
1036:
1037: /*
1.13 jfb 1038: * cvs_sendentry()
1.12 jfb 1039: *
1040: * Send an `Entry' request to the server along with the mandatory fields from
1041: * the CVS entry <ent> (which are the name and revision).
1042: */
1043: int
1.47 jfb 1044: cvs_sendentry(struct cvsroot *root, const CVSFILE *file)
1.12 jfb 1045: {
1.51 xsa 1046: int l;
1.77 xsa 1047: char ebuf[CVS_ENT_MAXLINELEN], numbuf[64];
1.12 jfb 1048:
1.47 jfb 1049: if (file->cf_type != DT_REG) {
1050: cvs_log(LP_ERR, "attempt to send Entry for non-regular file");
1051: return (-1);
1052: }
1.48 joris 1053:
1054: /* don't send Entry for unknown files */
1055: if (file->cf_cvstat == CVS_FST_UNKNOWN)
1056: return (0);
1.47 jfb 1057:
1.51 xsa 1058: l = snprintf(ebuf, sizeof(ebuf), "/%s/%s%s///", file->cf_name,
1.49 joris 1059: (file->cf_cvstat == CVS_FST_REMOVED) ? "-" : "",
1.47 jfb 1060: rcsnum_tostr(file->cf_lrev, numbuf, sizeof(numbuf)));
1.51 xsa 1061: if (l == -1 || l >= (int)sizeof(ebuf)) {
1062: errno = ENAMETOOLONG;
1063: cvs_log(LP_ERRNO, "%s", ebuf);
1064: return (-1);
1065: }
1.12 jfb 1066:
1.13 jfb 1067: return cvs_sendreq(root, CVS_REQ_ENTRY, ebuf);
1.12 jfb 1068: }
1069:
1070:
1071: /*
1.13 jfb 1072: * cvs_initlog()
1.12 jfb 1073: *
1074: * Initialize protocol logging if the CVS_CLIENT_LOG environment variable is
1075: * set. In this case, the variable's value is used as a path to which the
1076: * appropriate suffix is added (".in" for server input and ".out" for server
1077: * output.
1078: * Returns 0 on success, or -1 on failure.
1079: */
1080: static int
1.13 jfb 1081: cvs_initlog(void)
1.12 jfb 1082: {
1.52 joris 1083: int l;
1084: u_int i;
1085: char *env, *envdup, buf[MAXPATHLEN], fpath[MAXPATHLEN];
1086: char rpath[MAXPATHLEN], *s;
1087: struct stat st;
1088: time_t now;
1089: struct passwd *pwd;
1.12 jfb 1090:
1.13 jfb 1091: /* avoid doing it more than once */
1092: if (cvs_server_logon)
1093: return (0);
1094:
1.12 jfb 1095: env = getenv("CVS_CLIENT_LOG");
1096: if (env == NULL)
1097: return (0);
1098:
1.52 joris 1099: if ((envdup = strdup(env)) == NULL)
1100: return (-1);
1101:
1102: if ((s = strchr(envdup, '%')) != NULL)
1103: *s = '\0';
1104:
1105: strlcpy(buf, env, sizeof(buf));
1106: strlcpy(rpath, envdup, sizeof(rpath));
1.69 moritz 1107: free(envdup);
1.52 joris 1108:
1109: s = buf;
1110: while ((s = strchr(s, '%')) != NULL) {
1111: *s++;
1112: switch (*s) {
1113: case 'c':
1114: strlcpy(fpath, cvs_command, sizeof(fpath));
1115: break;
1116: case 'd':
1117: time(&now);
1.59 niallo 1118: strlcpy(fpath, ctime(&now), sizeof(fpath));
1.52 joris 1119: break;
1120: case 'p':
1121: snprintf(fpath, sizeof(fpath), "%d", getpid());
1122: break;
1123: case 'u':
1124: if ((pwd = getpwuid(getuid())) != NULL)
1125: strlcpy(fpath, pwd->pw_name, sizeof(fpath));
1126: else
1127: fpath[0] = '\0';
1128: endpwent();
1129: break;
1130: default:
1131: fpath[0] = '\0';
1132: break;
1.58 joris 1133: }
1.52 joris 1134:
1135: if (fpath[0] != '\0') {
1136: strlcat(rpath, "-", sizeof(rpath));
1137: strlcat(rpath, fpath, sizeof(rpath));
1138: }
1139: }
1140:
1141: for (i = 0; i < UINT_MAX; i++) {
1142: l = snprintf(fpath, sizeof(fpath), "%s-%d.in", rpath, i);
1143: if (l == -1 || l >= (int)sizeof(fpath)) {
1144: errno = ENAMETOOLONG;
1145: cvs_log(LP_ERRNO, "%s", fpath);
1146: return (-1);
1147: }
1148:
1149: if (stat(fpath, &st) != -1)
1150: continue;
1151:
1152: if (errno != ENOENT)
1153: return (-1);
1154:
1155: break;
1156: }
1157:
1.12 jfb 1158: cvs_server_inlog = fopen(fpath, "w");
1159: if (cvs_server_inlog == NULL) {
1160: cvs_log(LP_ERRNO, "failed to open server input log `%s'",
1161: fpath);
1162: return (-1);
1163: }
1164:
1.52 joris 1165: for (i = 0; i < UINT_MAX; i++) {
1166: l = snprintf(fpath, sizeof(fpath), "%s-%d.out", rpath, i);
1167: if (l == -1 || l >= (int)sizeof(fpath)) {
1168: errno = ENAMETOOLONG;
1169: cvs_log(LP_ERRNO, "%s", fpath);
1170: return (-1);
1171: }
1172:
1173: if (stat(fpath, &st) != -1)
1174: continue;
1175:
1176: if (errno != ENOENT)
1177: return (-1);
1178:
1179: break;
1180: }
1181:
1.12 jfb 1182: cvs_server_outlog = fopen(fpath, "w");
1183: if (cvs_server_outlog == NULL) {
1184: cvs_log(LP_ERRNO, "failed to open server output log `%s'",
1185: fpath);
1186: return (-1);
1187: }
1188:
1189: /* make the streams line-buffered */
1.75 xsa 1190: setvbuf(cvs_server_inlog, NULL, _IOLBF, (size_t)0);
1191: setvbuf(cvs_server_outlog, NULL, _IOLBF, (size_t)0);
1.12 jfb 1192:
1.13 jfb 1193: cvs_server_logon = 1;
1.12 jfb 1194:
1195: return (0);
1196: }
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