Annotation of src/usr.bin/cvs/proto.c, Revision 1.84
1.84 ! reyk 1: /* $OpenBSD: proto.c,v 1.83 2005/12/30 16:47:36 joris 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 },
1.79 moritz 119: { CVS_REQ_WATCH_ON, "watch-on", CVS_REQF_RESP },
120: { CVS_REQ_WATCH_OFF, "watch-off", CVS_REQF_RESP },
121: { CVS_REQ_WATCH_ADD, "watch-add", CVS_REQF_RESP },
122: { CVS_REQ_WATCH_REMOVE, "watch-remove", CVS_REQF_RESP },
1.78 xsa 123: { CVS_REQ_EDITORS, "editors", CVS_REQF_RESP },
1.1 jfb 124: };
125:
1.18 jfb 126: struct cvs_resp cvs_responses[] = {
127: { CVS_RESP_OK, "ok" },
128: { CVS_RESP_ERROR, "error" },
129: { CVS_RESP_VALIDREQ, "Valid-requests" },
130: { CVS_RESP_M, "M" },
131: { CVS_RESP_MBINARY, "Mbinary" },
132: { CVS_RESP_MT, "MT" },
133: { CVS_RESP_E, "E" },
134: { CVS_RESP_F, "F" },
135: { CVS_RESP_CREATED, "Created" },
136: { CVS_RESP_UPDATED, "Updated" },
137: { CVS_RESP_UPDEXIST, "Update-existing" },
138: { CVS_RESP_MERGED, "Merged" },
139: { CVS_RESP_REMOVED, "Removed" },
1.63 joris 140: { CVS_RESP_RMENTRY, "Remove-entry" },
1.18 jfb 141: { CVS_RESP_CKSUM, "Checksum" },
142: { CVS_RESP_CLRSTATDIR, "Clear-static-directory" },
143: { CVS_RESP_SETSTATDIR, "Set-static-directory" },
144: { CVS_RESP_NEWENTRY, "New-entry" },
145: { CVS_RESP_CHECKEDIN, "Checked-in" },
146: { CVS_RESP_MODE, "Mode" },
147: { CVS_RESP_MODTIME, "Mod-time" },
148: { CVS_RESP_MODXPAND, "Module-expansion" },
149: { CVS_RESP_SETSTICKY, "Set-sticky" },
150: { CVS_RESP_CLRSTICKY, "Clear-sticky" },
151: { CVS_RESP_RCSDIFF, "Rcs-diff" },
152: { CVS_RESP_TEMPLATE, "Template" },
1.34 jfb 153: { CVS_RESP_COPYFILE, "Copy-file" },
1.1 jfb 154: };
155:
1.68 xsa 156: #define CVS_NBREQ (sizeof(cvs_requests)/sizeof(cvs_requests[0]))
157: #define CVS_NBRESP (sizeof(cvs_responses)/sizeof(cvs_responses[0]))
1.17 jfb 158:
159: /* hack to receive the remote version without outputting it */
1.18 jfb 160: u_int cvs_version_sent = 0;
1.17 jfb 161:
1.13 jfb 162: static char cvs_proto_buf[4096];
163:
164: /*
1.37 david 165: * Output files for protocol logging when the CVS_CLIENT_LOG environment
1.13 jfb 166: * variable is set.
167: */
168: static int cvs_server_logon = 0;
169: static FILE *cvs_server_inlog = NULL;
170: static FILE *cvs_server_outlog = NULL;
171:
1.28 jfb 172: static pid_t cvs_subproc_pid;
173:
1.32 jfb 174: /* last directory sent with cvs_senddir() */
175: static char cvs_lastdir[MAXPATHLEN] = "";
176:
1.13 jfb 177:
178: /*
179: * cvs_connect()
180: *
181: * Open a client connection to the cvs server whose address is given in
182: * the <root> variable. The method used to connect depends on the
183: * setting of the CVS_RSH variable.
1.17 jfb 184: * Once the connection has been established, we first send the list of
185: * responses we support and request the list of supported requests from the
186: * server. Then, a version request is sent and various global flags are sent.
1.13 jfb 187: */
1.82 joris 188: void
1.13 jfb 189: cvs_connect(struct cvsroot *root)
190: {
1.82 joris 191: size_t len;
1.20 jfb 192: int argc, infd[2], outfd[2], errfd[2];
1.71 xsa 193: char *argv[16], *cvs_server_cmd, tmsg[1024], *vresp;
1.13 jfb 194:
1.82 joris 195: if (root->cr_method == CVS_METHOD_PSERVER)
196: fatal("no pserver support due to security issues");
197: else if ((root->cr_method == CVS_METHOD_KSERVER) ||
1.36 jfb 198: (root->cr_method == CVS_METHOD_GSERVER) ||
199: (root->cr_method == CVS_METHOD_EXT) ||
1.82 joris 200: (root->cr_method == CVS_METHOD_FORK))
201: fatal("connection method not supported yet");
1.33 jfb 202:
203: if (root->cr_flags & CVS_ROOT_CONNECTED) {
204: cvs_log(LP_NOTICE, "already connected to CVSROOT");
1.82 joris 205: return;
1.33 jfb 206: }
207:
1.82 joris 208: if (pipe(infd) == -1)
209: fatal("failed to create input pipe for client connection");
1.13 jfb 210:
1.82 joris 211: if (pipe(outfd) == -1)
212: fatal("failed to create output pipe for client connection");
1.13 jfb 213:
1.82 joris 214: if (pipe(errfd) == -1)
215: fatal("failed to create error pipe for client connection");
1.20 jfb 216:
1.28 jfb 217: cvs_subproc_pid = fork();
218: if (cvs_subproc_pid == -1) {
1.82 joris 219: fatal("failed to fork for cvs server connection");
1.30 deraadt 220: } else if (cvs_subproc_pid == 0) {
1.13 jfb 221: if ((dup2(infd[0], STDIN_FILENO) == -1) ||
1.82 joris 222: (dup2(outfd[1], STDOUT_FILENO) == -1))
1.84 ! reyk 223: fatal("failed to setup standard streams "
! 224: "for cvs server");
1.82 joris 225:
1.13 jfb 226: (void)close(infd[1]);
227: (void)close(outfd[0]);
1.20 jfb 228: (void)close(errfd[0]);
1.13 jfb 229:
230: argc = 0;
231: argv[argc++] = cvs_rsh;
232:
233: if (root->cr_user != NULL) {
234: argv[argc++] = "-l";
235: argv[argc++] = root->cr_user;
236: }
237:
238: cvs_server_cmd = getenv("CVS_SERVER");
239: if (cvs_server_cmd == NULL)
1.20 jfb 240: cvs_server_cmd = CVS_SERVER_DEFAULT;
1.13 jfb 241:
242: argv[argc++] = root->cr_host;
243: argv[argc++] = cvs_server_cmd;
244: argv[argc++] = "server";
245: argv[argc] = NULL;
1.71 xsa 246:
247: if (cvs_trace == 1) {
248: tmsg[0] = '\0';
249: for (argc = 0; argv[argc] != NULL; argc++) {
1.82 joris 250: len = strlcat(tmsg, argv[argc], sizeof(tmsg));
251: if (len >= sizeof(tmsg))
252: fatal("truncation in cvs_connect");
253:
254: len = strlcat(tmsg, " ", sizeof(tmsg));
255: if (len >= sizeof(tmsg))
256: fatal("truncation in cvs_connect");
1.71 xsa 257: }
258: }
1.82 joris 259:
1.71 xsa 260: cvs_log(LP_TRACE, "Starting server: %s", tmsg);
1.13 jfb 261:
262: execvp(argv[0], argv);
1.82 joris 263: fatal("failed to execute cvs server");
1.13 jfb 264: }
265:
266: /* we are the parent */
267: (void)close(infd[0]);
268: (void)close(outfd[1]);
1.20 jfb 269: (void)close(errfd[1]);
1.13 jfb 270:
271: root->cr_srvin = fdopen(infd[1], "w");
1.82 joris 272: if (root->cr_srvin == NULL)
273: fatal("failed to create pipe stream");
1.13 jfb 274:
275: root->cr_srvout = fdopen(outfd[0], "r");
1.82 joris 276: if (root->cr_srvout == NULL)
277: fatal("failed to create pipe stream");
1.20 jfb 278:
1.13 jfb 279: /* make the streams line-buffered */
1.75 xsa 280: (void)setvbuf(root->cr_srvin, NULL, _IOLBF, (size_t)0);
281: (void)setvbuf(root->cr_srvout, NULL, _IOLBF, (size_t)0);
1.13 jfb 282:
283: cvs_initlog();
284:
285: /*
286: * Send the server the list of valid responses, then ask for valid
287: * requests.
288: */
289:
1.82 joris 290: vresp = cvs_resp_getvalid();
291: cvs_sendreq(root, CVS_REQ_VALIDRESP, vresp);
1.80 joris 292: xfree(vresp);
1.13 jfb 293:
1.82 joris 294: cvs_sendreq(root, CVS_REQ_VALIDREQ, NULL);
1.13 jfb 295:
1.62 xsa 296: /* send the CVSROOT to the server */
1.82 joris 297: cvs_sendreq(root, CVS_REQ_ROOT, root->cr_dir);
1.54 joris 298:
1.40 jfb 299: /* don't fail if this request doesn't work */
1.82 joris 300: cvs_sendreq(root, CVS_REQ_VERSION, NULL);
1.17 jfb 301:
1.13 jfb 302: /* now share our global options with the server */
1.82 joris 303: if (verbosity <= 1)
304: cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-q");
305: if (verbosity == 0)
306: cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-Q");
307:
308: if (cvs_noexec == 1)
309: cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-n");
310:
311: if (cvs_nolog == 1)
312: cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-l");
313:
314: if (cvs_readonly == 1)
315: cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-r");
1.40 jfb 316:
1.82 joris 317: if (cvs_trace == 1)
318: cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-t");
1.13 jfb 319:
320: /* not sure why, but we have to send this */
1.82 joris 321: cvs_sendreq(root, CVS_REQ_USEUNCHANGED, NULL);
1.13 jfb 322:
323: cvs_log(LP_DEBUG, "connected to %s", root->cr_host);
324:
1.33 jfb 325: root->cr_flags |= CVS_ROOT_CONNECTED;
1.13 jfb 326: }
327:
328:
329: /*
330: * cvs_disconnect()
331: *
332: * Disconnect from the cvs server.
333: */
334: void
335: cvs_disconnect(struct cvsroot *root)
336: {
1.33 jfb 337: if (!(root->cr_flags & CVS_ROOT_CONNECTED))
338: return;
339:
1.13 jfb 340: cvs_log(LP_DEBUG, "closing connection to %s", root->cr_host);
1.82 joris 341:
1.13 jfb 342: if (root->cr_srvin != NULL) {
343: (void)fclose(root->cr_srvin);
344: root->cr_srvin = NULL;
345: }
346: if (root->cr_srvout != NULL) {
347: (void)fclose(root->cr_srvout);
348: root->cr_srvout = NULL;
349: }
1.33 jfb 350:
351: root->cr_flags &= ~CVS_ROOT_CONNECTED;
1.13 jfb 352: }
353:
1.1 jfb 354:
355: /*
356: * cvs_req_getbyid()
357: *
358: */
1.13 jfb 359: struct cvs_req*
1.1 jfb 360: cvs_req_getbyid(int reqid)
361: {
362: u_int i;
363:
364: for (i = 0; i < CVS_NBREQ; i++)
365: if (cvs_requests[i].req_id == reqid)
1.13 jfb 366: return &(cvs_requests[i]);
1.31 tedu 367:
1.1 jfb 368: return (NULL);
369: }
370:
371:
372: /*
373: * cvs_req_getbyname()
374: */
1.13 jfb 375: struct cvs_req*
1.1 jfb 376: cvs_req_getbyname(const char *rname)
377: {
378: u_int i;
379:
380: for (i = 0; i < CVS_NBREQ; i++)
381: if (strcmp(cvs_requests[i].req_str, rname) == 0)
1.13 jfb 382: return &(cvs_requests[i]);
1.1 jfb 383:
1.13 jfb 384: return (NULL);
1.1 jfb 385: }
386:
387:
388: /*
389: * cvs_req_getvalid()
390: *
391: * Build a space-separated list of all the requests that this protocol
392: * implementation supports.
393: */
1.67 xsa 394: char *
1.1 jfb 395: cvs_req_getvalid(void)
396: {
397: u_int i;
398: size_t len;
399: char *vrstr;
400: BUF *buf;
401:
1.75 xsa 402: buf = cvs_buf_alloc((size_t)512, BUF_AUTOEXT);
1.1 jfb 403:
404: cvs_buf_set(buf, cvs_requests[0].req_str,
1.75 xsa 405: strlen(cvs_requests[0].req_str), (size_t)0);
1.1 jfb 406:
407: for (i = 1; i < CVS_NBREQ; i++) {
1.81 xsa 408: cvs_buf_putc(buf, ' ');
409: cvs_buf_append(buf, cvs_requests[i].req_str,
410: strlen(cvs_requests[i].req_str));
1.1 jfb 411: }
412:
413: /* NUL-terminate */
1.81 xsa 414: cvs_buf_putc(buf, '\0');
1.1 jfb 415:
1.70 moritz 416: len = cvs_buf_len(buf);
1.80 joris 417: vrstr = (char *)xmalloc(len);
1.75 xsa 418: cvs_buf_copy(buf, (size_t)0, vrstr, len);
1.1 jfb 419: cvs_buf_free(buf);
420:
421: return (vrstr);
422: }
423:
424:
425: /*
426: * cvs_resp_getbyid()
427: *
428: */
1.13 jfb 429: struct cvs_resp*
1.1 jfb 430: cvs_resp_getbyid(int respid)
431: {
432: u_int i;
433:
1.44 tedu 434: for (i = 0; i < CVS_NBRESP; i++)
1.13 jfb 435: if (cvs_responses[i].resp_id == (u_int)respid)
436: return &(cvs_responses[i]);
1.31 tedu 437:
1.1 jfb 438: return (NULL);
439: }
440:
441:
442: /*
443: * cvs_resp_getbyname()
444: */
1.67 xsa 445: struct cvs_resp *
1.1 jfb 446: cvs_resp_getbyname(const char *rname)
447: {
448: u_int i;
449:
1.44 tedu 450: for (i = 0; i < CVS_NBRESP; i++)
1.1 jfb 451: if (strcmp(cvs_responses[i].resp_str, rname) == 0)
1.13 jfb 452: return &(cvs_responses[i]);
1.1 jfb 453:
1.13 jfb 454: return (NULL);
1.1 jfb 455: }
456:
457:
458: /*
459: * cvs_resp_getvalid()
460: *
461: * Build a space-separated list of all the responses that this protocol
462: * implementation supports.
463: */
1.67 xsa 464: char *
1.1 jfb 465: cvs_resp_getvalid(void)
466: {
467: u_int i;
468: size_t len;
469: char *vrstr;
470: BUF *buf;
471:
1.75 xsa 472: buf = cvs_buf_alloc((size_t)512, BUF_AUTOEXT);
1.1 jfb 473:
474: cvs_buf_set(buf, cvs_responses[0].resp_str,
1.75 xsa 475: strlen(cvs_responses[0].resp_str), (size_t)0);
1.1 jfb 476:
477: for (i = 1; i < CVS_NBRESP; i++) {
1.81 xsa 478: cvs_buf_putc(buf, ' ');
479: cvs_buf_append(buf, cvs_responses[i].resp_str,
480: strlen(cvs_responses[i].resp_str));
1.1 jfb 481: }
482:
483: /* NUL-terminate */
1.81 xsa 484: cvs_buf_putc(buf, '\0');
1.1 jfb 485:
1.70 moritz 486: len = cvs_buf_len(buf);
1.80 joris 487: vrstr = (char *)xmalloc(len);
1.75 xsa 488: cvs_buf_copy(buf, (size_t)0, vrstr, len);
1.1 jfb 489: cvs_buf_free(buf);
490:
491: return (vrstr);
492: }
493:
494:
495: /*
496: * cvs_sendfile()
497: *
498: * Send the mode and size of a file followed by the file's contents.
499: * Returns 0 on success, or -1 on failure.
500: */
1.82 joris 501: void
1.13 jfb 502: cvs_sendfile(struct cvsroot *root, const char *path)
1.1 jfb 503: {
1.51 xsa 504: int fd, l;
1.1 jfb 505: ssize_t ret;
506: char buf[4096];
507: struct stat st;
508:
1.38 jfb 509: cvs_log(LP_TRACE, "Sending file `%s' to server", basename(path));
510:
1.1 jfb 511: if (stat(path, &st) == -1) {
1.82 joris 512: fatal("cvs_sendfile(): stat failed on '%s': %s",
513: path, strerror(errno));
1.1 jfb 514: }
515:
1.82 joris 516: cvs_modetostr(st.st_mode, buf, sizeof(buf));
1.24 jfb 517:
1.1 jfb 518: fd = open(path, O_RDONLY, 0);
519: if (fd == -1) {
1.82 joris 520: fatal("cvs_sendfile(): failed to open '%s': %s",
521: path, strerror(errno));
1.1 jfb 522: }
523:
1.82 joris 524: cvs_sendln(root, buf);
525:
1.51 xsa 526: l = snprintf(buf, sizeof(buf), "%lld\n", st.st_size);
527: if (l == -1 || l >= (int)sizeof(buf))
1.82 joris 528: fatal("overflow in cvs_sendfile");
1.51 xsa 529:
1.82 joris 530: cvs_sendln(root, buf);
1.1 jfb 531:
532: while ((ret = read(fd, buf, sizeof(buf))) != 0) {
533: if (ret == -1) {
1.24 jfb 534: (void)close(fd);
1.82 joris 535: fatal("cvs_sendfile: read error on '%s'", path);
1.1 jfb 536: }
537:
1.82 joris 538: cvs_sendraw(root, buf, (size_t)ret);
1.1 jfb 539: }
540:
541: (void)close(fd);
542: }
543:
544:
545: /*
546: * cvs_recvfile()
547: *
548: * Receive the mode and size of a file followed the file's contents and
549: * create or update the file whose path is <path> with the received
550: * information.
551: */
1.14 jfb 552: BUF*
553: cvs_recvfile(struct cvsroot *root, mode_t *mode)
1.1 jfb 554: {
555: size_t len;
556: ssize_t ret;
557: off_t fsz, cnt;
558: char buf[4096], *ep;
1.14 jfb 559: BUF *fbuf;
560:
561: fbuf = cvs_buf_alloc(sizeof(buf), BUF_AUTOEXT);
1.1 jfb 562:
1.83 joris 563: cvs_getln(root, buf, sizeof(buf));
564: cvs_strtomode(buf, mode);
1.1 jfb 565:
1.83 joris 566: cvs_getln(root, buf, sizeof(buf));
1.1 jfb 567:
568: fsz = (off_t)strtol(buf, &ep, 10);
1.83 joris 569: if (*ep != '\0')
570: fatal("parse error in file size transmission");
1.1 jfb 571:
572: cnt = 0;
573: do {
574: len = MIN(sizeof(buf), (size_t)(fsz - cnt));
1.6 jfb 575: if (len == 0)
576: break;
1.13 jfb 577: ret = cvs_recvraw(root, buf, len);
1.83 joris 578: cvs_buf_append(fbuf, buf, (size_t)ret);
1.1 jfb 579: cnt += (off_t)ret;
580: } while (cnt < fsz);
581:
1.14 jfb 582: return (fbuf);
1.1 jfb 583: }
1.12 jfb 584:
585: /*
586: * cvs_sendreq()
587: *
588: * Send a request to the server of type <rid>, with optional arguments
589: * contained in <arg>, which should not be terminated by a newline.
590: * Returns 0 on success, or -1 on failure.
591: */
1.82 joris 592: void
1.13 jfb 593: cvs_sendreq(struct cvsroot *root, u_int rid, const char *arg)
1.12 jfb 594: {
1.51 xsa 595: int ret, l;
1.13 jfb 596: struct cvs_req *req;
1.12 jfb 597:
1.82 joris 598: if (root->cr_srvin == NULL)
599: fatal("cannot send request %u: Not connected", rid);
1.12 jfb 600:
1.13 jfb 601: req = cvs_req_getbyid(rid);
1.82 joris 602: if (req == NULL)
603: fatal("unsupported request type %u", rid);
1.12 jfb 604:
1.18 jfb 605: /* is this request supported by the server? */
606: if (!CVS_GETVR(root, req->req_id)) {
1.57 joris 607: if (rid == CVS_REQ_VERSION) {
1.82 joris 608: cvs_sendreq(root, CVS_REQ_NOOP, arg);
1.57 joris 609: } else {
610: cvs_log(LP_WARN,
611: "remote end does not support request `%s'",
612: req->req_str);
613: }
1.84 ! reyk 614:
1.82 joris 615: return;
1.18 jfb 616: }
617:
1.51 xsa 618: l = snprintf(cvs_proto_buf, sizeof(cvs_proto_buf), "%s%s%s\n",
1.13 jfb 619: req->req_str, (arg == NULL) ? "" : " ", (arg == NULL) ? "" : arg);
1.51 xsa 620: if (l == -1 || l >= (int)sizeof(cvs_proto_buf))
1.82 joris 621: fatal("overflow in cvs_sendreq");
1.12 jfb 622:
623: if (cvs_server_inlog != NULL)
1.13 jfb 624: fputs(cvs_proto_buf, cvs_server_inlog);
1.12 jfb 625:
1.13 jfb 626: ret = fputs(cvs_proto_buf, root->cr_srvin);
1.82 joris 627: if (ret == EOF)
628: fatal("failed to send request to server");
1.17 jfb 629:
630: if (rid == CVS_REQ_VERSION)
631: cvs_version_sent = 1;
1.12 jfb 632:
1.13 jfb 633: if (req->req_flags & CVS_REQF_RESP)
1.82 joris 634: cvs_getresp(root);
1.12 jfb 635: }
636:
637:
638: /*
639: * cvs_getresp()
640: *
641: * Get a response from the server. This call will actually read and handle
642: * responses from the server until one of the response handlers returns
1.37 david 643: * non-zero (either an error occurred or the end of the response was reached).
1.12 jfb 644: * Returns the number of handled commands on success, or -1 on failure.
645: */
1.82 joris 646: void
1.13 jfb 647: cvs_getresp(struct cvsroot *root)
1.12 jfb 648: {
1.82 joris 649: int ret;
1.13 jfb 650: size_t len;
1.12 jfb 651:
652: do {
653: /* wait for incoming data */
1.74 xsa 654: if (fgets(cvs_proto_buf, (int)sizeof(cvs_proto_buf),
1.12 jfb 655: root->cr_srvout) == NULL) {
656: if (feof(root->cr_srvout))
1.82 joris 657: return;
658: fatal("failed to read response from server");
1.12 jfb 659: }
660:
661: if (cvs_server_outlog != NULL)
1.13 jfb 662: fputs(cvs_proto_buf, cvs_server_outlog);
1.12 jfb 663:
1.13 jfb 664: if ((len = strlen(cvs_proto_buf)) != 0) {
1.42 joris 665: /* if len - 1 != '\n' the line is truncated */
1.43 joris 666: if (cvs_proto_buf[len - 1] == '\n')
1.13 jfb 667: cvs_proto_buf[--len] = '\0';
1.12 jfb 668: }
669:
1.13 jfb 670: ret = cvs_resp_handle(root, cvs_proto_buf);
1.12 jfb 671: } while (ret == 0);
672: }
673:
674:
675: /*
1.13 jfb 676: * cvs_getln()
677: *
1.18 jfb 678: * Get a line from the remote end and store it in <lbuf>. The terminating
1.13 jfb 679: * newline character is stripped from the result.
680: */
1.83 joris 681: void
1.13 jfb 682: cvs_getln(struct cvsroot *root, char *lbuf, size_t len)
683: {
684: size_t rlen;
1.18 jfb 685: FILE *in;
1.13 jfb 686:
1.18 jfb 687: if (cvs_cmdop == CVS_OP_SERVER)
688: in = stdin;
689: else
690: in = root->cr_srvout;
691:
1.74 xsa 692: if (fgets(lbuf, (int)len, in) == NULL) {
1.18 jfb 693: if (ferror(in)) {
1.83 joris 694: fatal("cvs_getln: error reading server: %s",
695: strerror(errno));
1.13 jfb 696: }
697:
1.18 jfb 698: if (feof(in))
1.13 jfb 699: *lbuf = '\0';
700: }
701:
702: if (cvs_server_outlog != NULL)
703: fputs(lbuf, cvs_server_outlog);
704:
705: rlen = strlen(lbuf);
706: if ((rlen > 0) && (lbuf[rlen - 1] == '\n'))
707: lbuf[--rlen] = '\0';
708: }
709:
1.19 jfb 710:
1.13 jfb 711: /*
1.12 jfb 712: * cvs_sendresp()
713: *
1.19 jfb 714: * Send a response of type <rid> to the client, with optional arguments
1.12 jfb 715: * contained in <arg>, which should not be terminated by a newline.
716: * Returns 0 on success, or -1 on failure.
717: */
718: int
719: cvs_sendresp(u_int rid, const char *arg)
720: {
721: int ret;
1.19 jfb 722: struct cvs_resp *resp;
1.12 jfb 723:
724: resp = cvs_resp_getbyid(rid);
1.13 jfb 725: if (resp == NULL) {
1.12 jfb 726: cvs_log(LP_ERR, "unsupported response type %u", rid);
727: return (-1);
728: }
729:
1.19 jfb 730: ret = fputs(resp->resp_str, stdout);
1.12 jfb 731: if (ret == EOF) {
732: cvs_log(LP_ERRNO, "failed to send response to client");
1.30 deraadt 733: } else {
1.19 jfb 734: if (arg != NULL) {
735: putc(' ', stdout);
736: fputs(arg, stdout);
737: }
1.12 jfb 738: putc('\n', stdout);
739: }
740: return (0);
741: }
742:
743:
1.19 jfb 744: #ifdef notyet
1.12 jfb 745: /*
746: * cvs_getreq()
747: *
748: * Get a request from the client.
749: */
750: int
751: cvs_getreq(void)
752: {
753: int nbcmd;
754:
755: nbcmd = 0;
756:
757: do {
758: /* wait for incoming data */
1.74 xsa 759: if (fgets(cvs_proto_buf, (int)sizeof(cvs_proto_buf),
1.12 jfb 760: stdin) == NULL) {
761: if (feof(stdin))
762: return (0);
763: cvs_log(LP_ERRNO,
764: "failed to read request from client");
765: return (-1);
766: }
767:
1.13 jfb 768: if ((len = strlen(cvs_proto_buf)) != 0) {
769: if (cvs_proto_buf[len - 1] != '\n') {
1.12 jfb 770: /* truncated line */
1.30 deraadt 771: } else
1.13 jfb 772: cvs_proto_buf[--len] = '\0';
1.12 jfb 773: }
774:
1.13 jfb 775: ret = cvs_resp_handle(cvs_proto_buf);
1.12 jfb 776: } while (ret == 0);
777: }
778: #endif
779:
780:
781: /*
782: * cvs_sendln()
783: *
1.18 jfb 784: * Send a single line <line> string to the remote end. The line is sent as is,
1.12 jfb 785: * without any modifications.
786: */
1.82 joris 787: void
1.12 jfb 788: cvs_sendln(struct cvsroot *root, const char *line)
789: {
790: int nl;
791: size_t len;
1.18 jfb 792: FILE *out;
793:
794: if (cvs_cmdop == CVS_OP_SERVER)
795: out = stdout;
796: else
797: out = root->cr_srvin;
1.12 jfb 798:
799: nl = 0;
800: len = strlen(line);
801:
802: if ((len > 0) && (line[len - 1] != '\n'))
803: nl = 1;
804:
805: if (cvs_server_inlog != NULL) {
806: fputs(line, cvs_server_inlog);
807: if (nl)
1.55 jfb 808: putc('\n', cvs_server_inlog);
1.12 jfb 809: }
1.18 jfb 810: fputs(line, out);
1.12 jfb 811: if (nl)
1.55 jfb 812: putc('\n', out);
1.12 jfb 813: }
814:
815:
816: /*
1.13 jfb 817: * cvs_sendraw()
1.12 jfb 818: *
819: * Send the first <len> bytes from the buffer <src> to the server.
820: */
1.82 joris 821: void
1.13 jfb 822: cvs_sendraw(struct cvsroot *root, const void *src, size_t len)
1.12 jfb 823: {
1.18 jfb 824: FILE *out;
825:
826: if (cvs_cmdop == CVS_OP_SERVER)
827: out = stdout;
828: else
829: out = root->cr_srvin;
830:
1.12 jfb 831: if (cvs_server_inlog != NULL)
832: fwrite(src, sizeof(char), len, cvs_server_inlog);
1.82 joris 833: if (fwrite(src, sizeof(char), len, out) < len)
834: fatal("failed to send data");
1.12 jfb 835: }
836:
837:
838: /*
1.13 jfb 839: * cvs_recvraw()
1.12 jfb 840: *
841: * Receive the first <len> bytes from the buffer <src> to the server.
842: */
1.83 joris 843: size_t
1.13 jfb 844: cvs_recvraw(struct cvsroot *root, void *dst, size_t len)
1.12 jfb 845: {
846: size_t ret;
1.18 jfb 847: FILE *in;
848:
849: if (cvs_cmdop == CVS_OP_SERVER)
850: in = stdin;
851: else
852: in = root->cr_srvout;
1.12 jfb 853:
1.18 jfb 854: ret = fread(dst, sizeof(char), len, in);
1.83 joris 855: if (ret == 0) {
856: if (ferror(in)) {
857: fatal("cvs_recvraw: error reading from server: %s",
858: strerror(errno));
859: }
860: } else {
861: if (cvs_server_outlog != NULL)
862: fwrite(dst, sizeof(char), len, cvs_server_outlog);
863: }
864:
865: return (ret);
1.12 jfb 866: }
867:
868:
869: /*
1.13 jfb 870: * cvs_senddir()
1.12 jfb 871: *
1.32 jfb 872: * Send a `Directory' request along with the 2 paths that follow it. If
873: * the directory info to be sent is the same as the last info sent, the
874: * call does nothing and simply returns without an error.
1.12 jfb 875: */
1.82 joris 876: void
1.31 tedu 877: cvs_senddir(struct cvsroot *root, CVSFILE *dir)
1.12 jfb 878: {
1.60 xsa 879: size_t len;
1.28 jfb 880: char lbuf[MAXPATHLEN], rbuf[MAXPATHLEN];
1.12 jfb 881:
1.47 jfb 882: if (dir->cf_type != DT_DIR)
1.82 joris 883: fatal("cvs_senddir(): cf_type != DT_DIR: %d", dir->cf_type);
1.47 jfb 884:
1.32 jfb 885: cvs_file_getpath(dir, lbuf, sizeof(lbuf));
1.45 joris 886: if (strcmp(lbuf, cvs_lastdir) == 0 && cvs_cmdop != CVS_OP_CHECKOUT)
1.82 joris 887: return;
1.32 jfb 888:
1.82 joris 889: if (dir->cf_repo == NULL) {
890: len = strlcpy(rbuf, root->cr_dir, sizeof(rbuf));
891: if (len >= sizeof(rbuf))
892: fatal("cvs_senddir: path truncation");
893: } else {
1.60 xsa 894: len = cvs_path_cat(root->cr_dir, dir->cf_repo, rbuf,
895: sizeof(rbuf));
896: if (len >= sizeof(rbuf))
1.82 joris 897: fatal("cvs_senddir: path truncation");
1.51 xsa 898: }
1.12 jfb 899:
1.82 joris 900: cvs_sendreq(root, CVS_REQ_DIRECTORY, lbuf);
901: cvs_sendln(root, rbuf);
1.28 jfb 902:
1.82 joris 903: len = strlcpy(cvs_lastdir, lbuf, sizeof(cvs_lastdir));
904: if (len >= sizeof(lbuf))
905: fatal("path truncation in cvs_senddir");
1.12 jfb 906: }
907:
908:
909: /*
1.13 jfb 910: * cvs_sendarg()
1.12 jfb 911: *
912: * Send the argument <arg> to the server. The argument <append> is used to
913: * determine if the argument should be simply appended to the last argument
914: * sent or if it should be created as a new argument (0).
915: */
1.82 joris 916: void
1.13 jfb 917: cvs_sendarg(struct cvsroot *root, const char *arg, int append)
1.12 jfb 918: {
1.82 joris 919: cvs_sendreq(root, ((append == 0) ? CVS_REQ_ARGUMENT :
920: CVS_REQ_ARGUMENTX), arg);
1.12 jfb 921: }
922:
923:
924: /*
1.13 jfb 925: * cvs_sendentry()
1.12 jfb 926: *
927: * Send an `Entry' request to the server along with the mandatory fields from
928: * the CVS entry <ent> (which are the name and revision).
929: */
1.82 joris 930: void
1.47 jfb 931: cvs_sendentry(struct cvsroot *root, const CVSFILE *file)
1.12 jfb 932: {
1.51 xsa 933: int l;
1.77 xsa 934: char ebuf[CVS_ENT_MAXLINELEN], numbuf[64];
1.12 jfb 935:
1.82 joris 936: if (file->cf_type != DT_REG)
937: fatal("cvs_sendentry: cf_type != DT_REG: %d", file->cf_type);
1.48 joris 938:
939: /* don't send Entry for unknown files */
940: if (file->cf_cvstat == CVS_FST_UNKNOWN)
1.82 joris 941: return;
1.47 jfb 942:
1.51 xsa 943: l = snprintf(ebuf, sizeof(ebuf), "/%s/%s%s///", file->cf_name,
1.49 joris 944: (file->cf_cvstat == CVS_FST_REMOVED) ? "-" : "",
1.47 jfb 945: rcsnum_tostr(file->cf_lrev, numbuf, sizeof(numbuf)));
1.82 joris 946: if (l == -1 || l >= (int)sizeof(ebuf))
947: fatal("cvs_sendentry: overflow when creating entry buffer");
1.12 jfb 948:
1.82 joris 949: cvs_sendreq(root, CVS_REQ_ENTRY, ebuf);
1.12 jfb 950: }
951:
952:
953: /*
1.13 jfb 954: * cvs_initlog()
1.12 jfb 955: *
956: * Initialize protocol logging if the CVS_CLIENT_LOG environment variable is
957: * set. In this case, the variable's value is used as a path to which the
958: * appropriate suffix is added (".in" for server input and ".out" for server
959: * output.
960: * Returns 0 on success, or -1 on failure.
961: */
962: static int
1.13 jfb 963: cvs_initlog(void)
1.12 jfb 964: {
1.52 joris 965: int l;
966: u_int i;
967: char *env, *envdup, buf[MAXPATHLEN], fpath[MAXPATHLEN];
968: char rpath[MAXPATHLEN], *s;
969: struct stat st;
970: time_t now;
971: struct passwd *pwd;
1.12 jfb 972:
1.13 jfb 973: /* avoid doing it more than once */
974: if (cvs_server_logon)
975: return (0);
976:
1.12 jfb 977: env = getenv("CVS_CLIENT_LOG");
978: if (env == NULL)
979: return (0);
980:
1.80 joris 981: envdup = xstrdup(env);
1.52 joris 982: if ((s = strchr(envdup, '%')) != NULL)
983: *s = '\0';
984:
985: strlcpy(buf, env, sizeof(buf));
986: strlcpy(rpath, envdup, sizeof(rpath));
1.80 joris 987: xfree(envdup);
1.52 joris 988:
989: s = buf;
990: while ((s = strchr(s, '%')) != NULL) {
991: *s++;
992: switch (*s) {
993: case 'c':
994: strlcpy(fpath, cvs_command, sizeof(fpath));
995: break;
996: case 'd':
997: time(&now);
1.59 niallo 998: strlcpy(fpath, ctime(&now), sizeof(fpath));
1.52 joris 999: break;
1000: case 'p':
1001: snprintf(fpath, sizeof(fpath), "%d", getpid());
1002: break;
1003: case 'u':
1004: if ((pwd = getpwuid(getuid())) != NULL)
1005: strlcpy(fpath, pwd->pw_name, sizeof(fpath));
1006: else
1007: fpath[0] = '\0';
1008: endpwent();
1009: break;
1010: default:
1011: fpath[0] = '\0';
1012: break;
1.58 joris 1013: }
1.52 joris 1014:
1015: if (fpath[0] != '\0') {
1016: strlcat(rpath, "-", sizeof(rpath));
1017: strlcat(rpath, fpath, sizeof(rpath));
1018: }
1019: }
1020:
1021: for (i = 0; i < UINT_MAX; i++) {
1022: l = snprintf(fpath, sizeof(fpath), "%s-%d.in", rpath, i);
1023: if (l == -1 || l >= (int)sizeof(fpath)) {
1024: errno = ENAMETOOLONG;
1025: cvs_log(LP_ERRNO, "%s", fpath);
1026: return (-1);
1027: }
1028:
1029: if (stat(fpath, &st) != -1)
1030: continue;
1031:
1032: if (errno != ENOENT)
1033: return (-1);
1034:
1035: break;
1036: }
1037:
1.12 jfb 1038: cvs_server_inlog = fopen(fpath, "w");
1039: if (cvs_server_inlog == NULL) {
1040: cvs_log(LP_ERRNO, "failed to open server input log `%s'",
1041: fpath);
1042: return (-1);
1043: }
1044:
1.52 joris 1045: for (i = 0; i < UINT_MAX; i++) {
1046: l = snprintf(fpath, sizeof(fpath), "%s-%d.out", rpath, i);
1047: if (l == -1 || l >= (int)sizeof(fpath)) {
1048: errno = ENAMETOOLONG;
1049: cvs_log(LP_ERRNO, "%s", fpath);
1050: return (-1);
1051: }
1052:
1053: if (stat(fpath, &st) != -1)
1054: continue;
1055:
1056: if (errno != ENOENT)
1057: return (-1);
1058:
1059: break;
1060: }
1061:
1.12 jfb 1062: cvs_server_outlog = fopen(fpath, "w");
1063: if (cvs_server_outlog == NULL) {
1064: cvs_log(LP_ERRNO, "failed to open server output log `%s'",
1065: fpath);
1066: return (-1);
1067: }
1068:
1069: /* make the streams line-buffered */
1.75 xsa 1070: setvbuf(cvs_server_inlog, NULL, _IOLBF, (size_t)0);
1071: setvbuf(cvs_server_outlog, NULL, _IOLBF, (size_t)0);
1.12 jfb 1072:
1.13 jfb 1073: cvs_server_logon = 1;
1.12 jfb 1074:
1075: return (0);
1076: }
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