/* $OpenBSD: proto.c,v 1.97 2006/04/14 02:49:43 deraadt Exp $ */ /* * Copyright (c) 2004 Jean-Francois Brousseau * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * CVS client/server protocol * ========================== * * The following code implements the CVS client/server protocol, which is * documented at the following URL: * http://www.iam.unibe.ch/~til/documentation/cvs/cvsclient_toc.html * http://www.elegosoft.com/cvs/cvsclient_toc.html * * The protocol is split up into two parts; the first part is the client side * of things and is composed of all the response handlers, which are all named * with a prefix of "cvs_resp_". The second part is the set of request * handlers used by the server. These handlers process the request and * generate the appropriate response to send back. The prefix for request * handlers is "cvs_req_". * */ #include "includes.h" #include "cvs.h" #include "log.h" #include "proto.h" /* request flags */ #define CVS_REQF_RESP 0x01 static void cvs_initlog(void); struct cvs_req cvs_requests[] = { { CVS_REQ_DIRECTORY, "Directory", 0 }, { CVS_REQ_MAXDOTDOT, "Max-dotdot", 0 }, { CVS_REQ_STATICDIR, "Static-directory", 0 }, { CVS_REQ_STICKY, "Sticky", 0 }, { CVS_REQ_ENTRY, "Entry", 0 }, { CVS_REQ_ENTRYEXTRA, "EntryExtra", 0 }, { CVS_REQ_CHECKINTIME, "Checkin-time", 0 }, { CVS_REQ_MODIFIED, "Modified", 0 }, { CVS_REQ_ISMODIFIED, "Is-modified", 0 }, { CVS_REQ_UNCHANGED, "Unchanged", 0 }, { CVS_REQ_USEUNCHANGED, "UseUnchanged", 0 }, { CVS_REQ_NOTIFY, "Notify", 0 }, { CVS_REQ_NOTIFYUSER, "NotifyUser", 0 }, { CVS_REQ_QUESTIONABLE, "Questionable", 0 }, { CVS_REQ_CASE, "Case", 0 }, { CVS_REQ_UTF8, "Utf8", 0 }, { CVS_REQ_ARGUMENT, "Argument", 0 }, { CVS_REQ_ARGUMENTX, "Argumentx", 0 }, { CVS_REQ_GLOBALOPT, "Global_option", 0 }, { CVS_REQ_GZIPSTREAM, "Gzip-stream", 0 }, { CVS_REQ_READCVSRC2, "read-cvsrc2", 0 }, { CVS_REQ_READWRAP, "read-cvswrappers", 0 }, { CVS_REQ_READIGNORE, "read-cvsignore", 0 }, { CVS_REQ_ERRIFREADER, "Error-If-Reader", 0 }, { CVS_REQ_VALIDRCSOPT, "Valid-RcsOptions", 0 }, { CVS_REQ_SET, "Set", 0 }, { CVS_REQ_XPANDMOD, "expand-modules", CVS_REQF_RESP }, { CVS_REQ_LOG, "log", CVS_REQF_RESP }, { CVS_REQ_CO, "co", CVS_REQF_RESP }, { CVS_REQ_EXPORT, "export", CVS_REQF_RESP }, { CVS_REQ_ANNOTATE, "annotate", CVS_REQF_RESP }, { CVS_REQ_RDIFF, "rdiff", CVS_REQF_RESP }, { CVS_REQ_RTAG, "rtag", CVS_REQF_RESP }, { CVS_REQ_INIT, "init", CVS_REQF_RESP }, { CVS_REQ_STATUS, "status", CVS_REQF_RESP }, { CVS_REQ_UPDATE, "update", CVS_REQF_RESP }, { CVS_REQ_HISTORY, "history", CVS_REQF_RESP }, { CVS_REQ_IMPORT, "import", CVS_REQF_RESP }, { CVS_REQ_ADD, "add", CVS_REQF_RESP }, { CVS_REQ_REMOVE, "remove", CVS_REQF_RESP }, { CVS_REQ_RELEASE, "release", CVS_REQF_RESP }, { CVS_REQ_ROOT, "Root", 0 }, { CVS_REQ_VALIDRESP, "Valid-responses", 0 }, { CVS_REQ_VALIDREQ, "valid-requests", CVS_REQF_RESP }, { CVS_REQ_VERSION, "version", CVS_REQF_RESP }, { CVS_REQ_NOOP, "noop", CVS_REQF_RESP }, { CVS_REQ_DIFF, "diff", CVS_REQF_RESP }, { CVS_REQ_CI, "ci", CVS_REQF_RESP }, { CVS_REQ_TAG, "tag", CVS_REQF_RESP }, { CVS_REQ_ADMIN, "admin", CVS_REQF_RESP }, { CVS_REQ_WATCHERS, "watchers", CVS_REQF_RESP }, { CVS_REQ_WATCH_ON, "watch-on", CVS_REQF_RESP }, { CVS_REQ_WATCH_OFF, "watch-off", CVS_REQF_RESP }, { CVS_REQ_WATCH_ADD, "watch-add", CVS_REQF_RESP }, { CVS_REQ_WATCH_REMOVE, "watch-remove", CVS_REQF_RESP }, { CVS_REQ_EDITORS, "editors", CVS_REQF_RESP }, }; struct cvs_resp cvs_responses[] = { { CVS_RESP_OK, "ok" }, { CVS_RESP_ERROR, "error" }, { CVS_RESP_VALIDREQ, "Valid-requests" }, { CVS_RESP_M, "M" }, { CVS_RESP_MBINARY, "Mbinary" }, { CVS_RESP_MT, "MT" }, { CVS_RESP_E, "E" }, { CVS_RESP_F, "F" }, { CVS_RESP_CREATED, "Created" }, { CVS_RESP_UPDATED, "Updated" }, { CVS_RESP_UPDEXIST, "Update-existing" }, { CVS_RESP_MERGED, "Merged" }, { CVS_RESP_REMOVED, "Removed" }, { CVS_RESP_RMENTRY, "Remove-entry" }, { CVS_RESP_CKSUM, "Checksum" }, { CVS_RESP_CLRSTATDIR, "Clear-static-directory" }, { CVS_RESP_SETSTATDIR, "Set-static-directory" }, { CVS_RESP_NEWENTRY, "New-entry" }, { CVS_RESP_CHECKEDIN, "Checked-in" }, { CVS_RESP_MODE, "Mode" }, { CVS_RESP_MODTIME, "Mod-time" }, { CVS_RESP_MODXPAND, "Module-expansion" }, { CVS_RESP_SETSTICKY, "Set-sticky" }, { CVS_RESP_CLRSTICKY, "Clear-sticky" }, { CVS_RESP_RCSDIFF, "Rcs-diff" }, { CVS_RESP_TEMPLATE, "Template" }, { CVS_RESP_COPYFILE, "Copy-file" }, }; #define CVS_NBREQ (sizeof(cvs_requests)/sizeof(cvs_requests[0])) #define CVS_NBRESP (sizeof(cvs_responses)/sizeof(cvs_responses[0])) /* hack to receive the remote version without outputting it */ u_int cvs_version_sent = 0; static char cvs_proto_buf[4096]; /* * Output files for protocol logging when the CVS_CLIENT_LOG environment * variable is set. */ static int cvs_server_logon = 0; static FILE *cvs_server_inlog = NULL; static FILE *cvs_server_outlog = NULL; static pid_t cvs_subproc_pid; /* last directory sent with cvs_senddir() */ static char cvs_lastdir[MAXPATHLEN] = ""; /* * cvs_connect() * * Open a client connection to the cvs server whose address is given in * the variable. The method used to connect depends on the * setting of the CVS_RSH variable. * Once the connection has been established, we first send the list of * responses we support and request the list of supported requests from the * server. Then, a version request is sent and various global flags are sent. */ void cvs_connect(struct cvsroot *root) { size_t len; int argc, infd[2], outfd[2], errfd[2]; char *argv[16], *cvs_server_cmd, tmsg[1024], *vresp; if (root->cr_method == CVS_METHOD_PSERVER) fatal("no pserver support due to security issues"); else if (root->cr_method == CVS_METHOD_KSERVER || root->cr_method == CVS_METHOD_GSERVER || root->cr_method == CVS_METHOD_EXT || root->cr_method == CVS_METHOD_FORK) fatal("connection method not supported yet"); if (root->cr_flags & CVS_ROOT_CONNECTED) { cvs_log(LP_NOTICE, "already connected to CVSROOT"); return; } if (pipe(infd) == -1) fatal("failed to create input pipe for client connection"); if (pipe(outfd) == -1) fatal("failed to create output pipe for client connection"); if (pipe(errfd) == -1) fatal("failed to create error pipe for client connection"); cvs_subproc_pid = fork(); if (cvs_subproc_pid == -1) { fatal("failed to fork for cvs server connection"); } else if (cvs_subproc_pid == 0) { if (dup2(infd[0], STDIN_FILENO) == -1 || dup2(outfd[1], STDOUT_FILENO) == -1) fatal("failed to setup standard streams " "for cvs server"); (void)close(infd[1]); (void)close(outfd[0]); (void)close(errfd[0]); argc = 0; argv[argc++] = cvs_rsh; if (root->cr_user != NULL) { argv[argc++] = "-l"; argv[argc++] = root->cr_user; } cvs_server_cmd = getenv("CVS_SERVER"); if (cvs_server_cmd == NULL) cvs_server_cmd = CVS_SERVER_DEFAULT; argv[argc++] = root->cr_host; argv[argc++] = cvs_server_cmd; argv[argc++] = "server"; argv[argc] = NULL; if (cvs_trace == 1) { tmsg[0] = '\0'; for (argc = 0; argv[argc] != NULL; argc++) { len = strlcat(tmsg, argv[argc], sizeof(tmsg)); if (len >= sizeof(tmsg)) fatal("truncation in cvs_connect"); len = strlcat(tmsg, " ", sizeof(tmsg)); if (len >= sizeof(tmsg)) fatal("truncation in cvs_connect"); } } cvs_log(LP_TRACE, "Starting server: %s", tmsg); execvp(argv[0], argv); fatal("failed to execute cvs server"); } /* we are the parent */ (void)close(infd[0]); (void)close(outfd[1]); (void)close(errfd[1]); root->cr_srvin = fdopen(infd[1], "w"); if (root->cr_srvin == NULL) fatal("failed to create pipe stream"); root->cr_srvout = fdopen(outfd[0], "r"); if (root->cr_srvout == NULL) fatal("failed to create pipe stream"); /* make the streams line-buffered */ (void)setvbuf(root->cr_srvin, NULL, _IOLBF, (size_t)0); (void)setvbuf(root->cr_srvout, NULL, _IOLBF, (size_t)0); cvs_initlog(); /* * Send the server the list of valid responses, then ask for valid * requests. */ vresp = cvs_resp_getvalid(); cvs_sendreq(root, CVS_REQ_VALIDRESP, vresp); xfree(vresp); cvs_sendreq(root, CVS_REQ_VALIDREQ, NULL); /* send the CVSROOT to the server */ cvs_sendreq(root, CVS_REQ_ROOT, root->cr_dir); /* don't fail if this request doesn't work */ cvs_sendreq(root, CVS_REQ_VERSION, NULL); /* now share our global options with the server */ if (verbosity <= 1) cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-q"); if (verbosity == 0) cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-Q"); if (cvs_noexec == 1) cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-n"); if (cvs_nolog == 1) cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-l"); if (cvs_readonly == 1) cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-r"); if (cvs_trace == 1) cvs_sendreq(root, CVS_REQ_GLOBALOPT, "-t"); /* not sure why, but we have to send this */ cvs_sendreq(root, CVS_REQ_USEUNCHANGED, NULL); cvs_log(LP_DEBUG, "connected to %s", root->cr_host); root->cr_flags |= CVS_ROOT_CONNECTED; } /* * cvs_disconnect() * * Disconnect from the cvs server. */ void cvs_disconnect(struct cvsroot *root) { if (!(root->cr_flags & CVS_ROOT_CONNECTED)) return; cvs_log(LP_DEBUG, "closing connection to %s", root->cr_host); if (root->cr_srvin != NULL) { (void)fclose(root->cr_srvin); root->cr_srvin = NULL; } if (root->cr_srvout != NULL) { (void)fclose(root->cr_srvout); root->cr_srvout = NULL; } root->cr_flags &= ~CVS_ROOT_CONNECTED; } /* * cvs_req_getbyid() * */ struct cvs_req* cvs_req_getbyid(int reqid) { u_int i; for (i = 0; i < CVS_NBREQ; i++) if (cvs_requests[i].req_id == reqid) return &(cvs_requests[i]); return (NULL); } /* * cvs_req_getbyname() */ struct cvs_req* cvs_req_getbyname(const char *rname) { u_int i; for (i = 0; i < CVS_NBREQ; i++) if (strcmp(cvs_requests[i].req_str, rname) == 0) return &(cvs_requests[i]); return (NULL); } /* * cvs_req_getvalid() * * Build a space-separated list of all the requests that this protocol * implementation supports. */ char * cvs_req_getvalid(void) { u_int i; size_t len; char *vrstr; BUF *buf; buf = cvs_buf_alloc((size_t)512, BUF_AUTOEXT); cvs_buf_set(buf, cvs_requests[0].req_str, strlen(cvs_requests[0].req_str), (size_t)0); for (i = 1; i < CVS_NBREQ; i++) { cvs_buf_putc(buf, ' '); cvs_buf_append(buf, cvs_requests[i].req_str, strlen(cvs_requests[i].req_str)); } /* NUL-terminate */ cvs_buf_putc(buf, '\0'); len = cvs_buf_len(buf); vrstr = xmalloc(len); cvs_buf_copy(buf, (size_t)0, vrstr, len); cvs_buf_free(buf); return (vrstr); } /* * cvs_resp_getbyid() * */ struct cvs_resp* cvs_resp_getbyid(int respid) { u_int i; for (i = 0; i < CVS_NBRESP; i++) if (cvs_responses[i].resp_id == (u_int)respid) return &(cvs_responses[i]); return (NULL); } /* * cvs_resp_getbyname() */ struct cvs_resp * cvs_resp_getbyname(const char *rname) { u_int i; for (i = 0; i < CVS_NBRESP; i++) if (strcmp(cvs_responses[i].resp_str, rname) == 0) return &(cvs_responses[i]); return (NULL); } /* * cvs_resp_getvalid() * * Build a space-separated list of all the responses that this protocol * implementation supports. */ char * cvs_resp_getvalid(void) { u_int i; size_t len; char *vrstr; BUF *buf; buf = cvs_buf_alloc((size_t)512, BUF_AUTOEXT); cvs_buf_set(buf, cvs_responses[0].resp_str, strlen(cvs_responses[0].resp_str), (size_t)0); for (i = 1; i < CVS_NBRESP; i++) { cvs_buf_putc(buf, ' '); cvs_buf_append(buf, cvs_responses[i].resp_str, strlen(cvs_responses[i].resp_str)); } /* NUL-terminate */ cvs_buf_putc(buf, '\0'); len = cvs_buf_len(buf); vrstr = xmalloc(len); cvs_buf_copy(buf, (size_t)0, vrstr, len); cvs_buf_free(buf); return (vrstr); } /* * cvs_sendfile() * * Send the mode and size of a file followed by the file's contents. * Returns 0 on success, or -1 on failure. */ void cvs_sendfile(struct cvsroot *root, const char *path) { int fd, l; ssize_t ret; char buf[4096]; struct stat st; cvs_log(LP_TRACE, "Sending file `%s' to server", basename(path)); if (stat(path, &st) == -1) { fatal("cvs_sendfile(): stat failed on '%s': %s", path, strerror(errno)); } cvs_modetostr(st.st_mode, buf, sizeof(buf)); fd = open(path, O_RDONLY, 0); if (fd == -1) { fatal("cvs_sendfile(): failed to open '%s': %s", path, strerror(errno)); } cvs_sendln(root, buf); l = snprintf(buf, sizeof(buf), "%lld\n", st.st_size); if (l == -1 || l >= (int)sizeof(buf)) fatal("overflow in cvs_sendfile"); cvs_sendln(root, buf); while ((ret = read(fd, buf, sizeof(buf))) != 0) { if (ret == -1) fatal("cvs_sendfile: read error on '%s'", path); cvs_sendraw(root, buf, (size_t)ret); } (void)close(fd); } /* * cvs_recvfile() * * Receive the mode and size of a file followed the file's contents and * create or update the file whose path is with the received * information. */ BUF* cvs_recvfile(struct cvsroot *root, mode_t *mode) { size_t len; ssize_t ret; off_t fsz, cnt; char buf[4096], *ep; BUF *fbuf; fbuf = cvs_buf_alloc(sizeof(buf), BUF_AUTOEXT); cvs_getln(root, buf, sizeof(buf)); cvs_strtomode(buf, mode); cvs_getln(root, buf, sizeof(buf)); fsz = (off_t)strtol(buf, &ep, 10); if (*ep != '\0') fatal("parse error in file size transmission"); cnt = 0; do { len = MIN(sizeof(buf), (size_t)(fsz - cnt)); if (len == 0) break; ret = cvs_recvraw(root, buf, len); cvs_buf_append(fbuf, buf, (size_t)ret); cnt += (off_t)ret; } while (cnt < fsz); return (fbuf); } /* * cvs_sendreq() * * Send a request to the server of type , with optional arguments * contained in , which should not be terminated by a newline. * Returns 0 on success, or -1 on failure. */ void cvs_sendreq(struct cvsroot *root, u_int rid, const char *arg) { int ret; struct cvs_req *req; if (root->cr_srvin == NULL) fatal("cannot send request %u: Not connected", rid); req = cvs_req_getbyid(rid); if (req == NULL) fatal("unsupported request type %u", rid); /* is this request supported by the server? */ if (!CVS_GETVR(root, req->req_id)) { if (rid == CVS_REQ_VERSION) { cvs_sendreq(root, CVS_REQ_NOOP, arg); } else { cvs_log(LP_WARN, "remote end does not support request `%s'", req->req_str); } return; } if (strlcpy(cvs_proto_buf, req->req_str, sizeof(cvs_proto_buf)) >= sizeof(cvs_proto_buf) || strlcat(cvs_proto_buf, (arg == NULL) ? "" : " ", sizeof(cvs_proto_buf)) >= sizeof(cvs_proto_buf) || strlcat(cvs_proto_buf, (arg == NULL) ? "" : arg, sizeof(cvs_proto_buf)) >= sizeof(cvs_proto_buf) || strlcat(cvs_proto_buf, "\n", sizeof(cvs_proto_buf)) >= sizeof(cvs_proto_buf)) fatal("cvs_sendreq: overflow when creating proto buffer"); if (cvs_server_inlog != NULL) fputs(cvs_proto_buf, cvs_server_inlog); ret = fputs(cvs_proto_buf, root->cr_srvin); if (ret == EOF) fatal("failed to send request to server"); if (rid == CVS_REQ_VERSION) cvs_version_sent = 1; if (req->req_flags & CVS_REQF_RESP) cvs_getresp(root); } /* * cvs_getresp() * * Get a response from the server. This call will actually read and handle * responses from the server until one of the response handlers returns * non-zero (either an error occurred or the end of the response was reached). * Returns the number of handled commands on success, or -1 on failure. */ void cvs_getresp(struct cvsroot *root) { int ret; size_t len; do { /* wait for incoming data */ if (fgets(cvs_proto_buf, (int)sizeof(cvs_proto_buf), root->cr_srvout) == NULL) { if (feof(root->cr_srvout)) return; fatal("failed to read response from server"); } if (cvs_server_outlog != NULL) fputs(cvs_proto_buf, cvs_server_outlog); if ((len = strlen(cvs_proto_buf)) != 0) { /* if len - 1 != '\n' the line is truncated */ if (cvs_proto_buf[len - 1] == '\n') cvs_proto_buf[--len] = '\0'; } ret = cvs_resp_handle(root, cvs_proto_buf); } while (ret == 0); } /* * cvs_getln() * * Get a line from the remote end and store it in . The terminating * newline character is stripped from the result. */ void cvs_getln(struct cvsroot *root, char *lbuf, size_t len) { size_t rlen; FILE *in; if (cvs_cmdop == CVS_OP_SERVER) in = stdin; else in = root->cr_srvout; if (fgets(lbuf, (int)len, in) == NULL) { if (ferror(in)) { fatal("cvs_getln: error reading server: %s", strerror(errno)); } if (feof(in)) *lbuf = '\0'; } if (cvs_server_outlog != NULL) fputs(lbuf, cvs_server_outlog); rlen = strlen(lbuf); if (rlen > 0 && lbuf[rlen - 1] == '\n') lbuf[--rlen] = '\0'; } /* * cvs_sendresp() * * Send a response of type to the client, with optional arguments * contained in , which should not be terminated by a newline. */ void cvs_sendresp(u_int rid, const char *arg) { int ret; struct cvs_resp *resp; if ((resp = cvs_resp_getbyid(rid)) == NULL) fatal("unsupported response type %u", rid); ret = fputs(resp->resp_str, stdout); if (ret == EOF) { cvs_log(LP_ERRNO, "failed to send response to client"); } else { if (arg != NULL) { putc(' ', stdout); fputs(arg, stdout); } putc('\n', stdout); } } /* * cvs_sendln() * * Send a single line string to the remote end. The line is sent as is, * without any modifications. */ void cvs_sendln(struct cvsroot *root, const char *line) { int nl; size_t len; FILE *out; if (cvs_cmdop == CVS_OP_SERVER) out = stdout; else out = root->cr_srvin; nl = 0; len = strlen(line); if (len > 0 && line[len - 1] != '\n') nl = 1; if (cvs_server_inlog != NULL) { fputs(line, cvs_server_inlog); if (nl) putc('\n', cvs_server_inlog); } fputs(line, out); if (nl) putc('\n', out); } /* * cvs_sendraw() * * Send the first bytes from the buffer to the server. */ void cvs_sendraw(struct cvsroot *root, const void *src, size_t len) { FILE *out; if (cvs_cmdop == CVS_OP_SERVER) out = stdout; else out = root->cr_srvin; if (cvs_server_inlog != NULL) fwrite(src, sizeof(char), len, cvs_server_inlog); if (fwrite(src, sizeof(char), len, out) < len) fatal("failed to send data"); } /* * cvs_recvraw() * * Receive the first bytes from the buffer to the server. */ size_t cvs_recvraw(struct cvsroot *root, void *dst, size_t len) { size_t ret; FILE *in; if (cvs_cmdop == CVS_OP_SERVER) in = stdin; else in = root->cr_srvout; ret = fread(dst, sizeof(char), len, in); if (ret == 0) { if (ferror(in)) { fatal("cvs_recvraw: error reading from server: %s", strerror(errno)); } } else { if (cvs_server_outlog != NULL) fwrite(dst, sizeof(char), len, cvs_server_outlog); } return (ret); } /* * cvs_senddir() * * Send a `Directory' request along with the 2 paths that follow it. If * the directory info to be sent is the same as the last info sent, the * call does nothing and simply returns without an error. */ void cvs_senddir(struct cvsroot *root, CVSFILE *dir) { size_t len; char lbuf[MAXPATHLEN], rbuf[MAXPATHLEN]; if (dir->cf_type != DT_DIR) fatal("cvs_senddir(): cf_type != DT_DIR: %d", dir->cf_type); cvs_file_getpath(dir, lbuf, sizeof(lbuf)); if (strcmp(lbuf, cvs_lastdir) == 0 && cvs_cmdop != CVS_OP_CHECKOUT) return; if (dir->cf_repo == NULL) { len = strlcpy(rbuf, root->cr_dir, sizeof(rbuf)); if (len >= sizeof(rbuf)) fatal("cvs_senddir: path truncation"); } else { len = cvs_path_cat(root->cr_dir, dir->cf_repo, rbuf, sizeof(rbuf)); if (len >= sizeof(rbuf)) fatal("cvs_senddir: path truncation"); } cvs_sendreq(root, CVS_REQ_DIRECTORY, lbuf); cvs_sendln(root, rbuf); len = strlcpy(cvs_lastdir, lbuf, sizeof(cvs_lastdir)); if (len >= sizeof(lbuf)) fatal("path truncation in cvs_senddir"); } /* * cvs_sendarg() * * Send the argument to the server. The argument is used to * determine if the argument should be simply appended to the last argument * sent or if it should be created as a new argument (0). */ void cvs_sendarg(struct cvsroot *root, const char *arg, int append) { cvs_sendreq(root, append == 0 ? CVS_REQ_ARGUMENT : CVS_REQ_ARGUMENTX, arg); } /* * cvs_sendentry() * * Send an `Entry' request to the server along with the mandatory fields from * the CVS entry (which are the name and revision). */ void cvs_sendentry(struct cvsroot *root, const CVSFILE *file) { char ebuf[CVS_ENT_MAXLINELEN], numbuf[64]; if (file->cf_type != DT_REG) fatal("cvs_sendentry: cf_type != DT_REG: %d", file->cf_type); /* don't send Entry for unknown files */ if (file->cf_cvstat == CVS_FST_UNKNOWN) return; if (strlcpy(ebuf, "/", sizeof(ebuf)) >= sizeof(ebuf) || strlcat(ebuf, file->cf_name, sizeof(ebuf)) >= sizeof(ebuf) || strlcat(ebuf, "/", sizeof(ebuf)) >= sizeof(ebuf) || strlcat(ebuf, (file->cf_cvstat == CVS_FST_REMOVED) ? "-" : "", sizeof(ebuf)) >= sizeof(ebuf) || strlcat(ebuf, rcsnum_tostr(file->cf_lrev, numbuf, sizeof(numbuf)), sizeof(ebuf)) >= sizeof(ebuf) || strlcat(ebuf, "///", sizeof(ebuf)) >= sizeof(ebuf)) fatal("cvs_sendentry: overflow when creating entry buffer"); cvs_sendreq(root, CVS_REQ_ENTRY, ebuf); } /* * cvs_initlog() * * Initialize protocol logging if the CVS_CLIENT_LOG environment variable is * set. In this case, the variable's value is used as a path to which the * appropriate suffix is added (".in" for server input and ".out" for server * output. * Returns 0 on success, or -1 on failure. */ static void cvs_initlog(void) { int l; u_int i; char *env, *envdup, buf[MAXPATHLEN], fpath[MAXPATHLEN]; char rpath[MAXPATHLEN], *s; struct stat st; time_t now; struct passwd *pwd; /* avoid doing it more than once */ if (cvs_server_logon) return; env = getenv("CVS_CLIENT_LOG"); if (env == NULL) return; envdup = xstrdup(env); if ((s = strchr(envdup, '%')) != NULL) *s = '\0'; if (strlcpy(buf, env, sizeof(buf)) >= sizeof(buf)) fatal("string truncation in cvs_initlog"); if (strlcpy(rpath, envdup, sizeof(rpath)) >= sizeof(rpath)) fatal("string truncation in cvs_initlog"); xfree(envdup); s = buf; while ((s = strchr(s, '%')) != NULL) { s++; switch (*s) { case 'c': if (strlcpy(fpath, cvs_command, sizeof(fpath)) >= sizeof(fpath)) fatal("string truncation in cvs_initlog"); break; case 'd': time(&now); if (strlcpy(fpath, ctime(&now), sizeof(fpath)) >= sizeof(fpath)) fatal("string truncation in cvs_initlog"); break; case 'p': snprintf(fpath, sizeof(fpath), "%d", getpid()); break; case 'u': if ((pwd = getpwuid(getuid())) != NULL) { if (strlcpy(fpath, pwd->pw_name, sizeof(fpath)) >= sizeof(fpath)) fatal("truncation in cvs_initlog"); } else { fpath[0] = '\0'; } endpwent(); break; default: fpath[0] = '\0'; break; } if (fpath[0] != '\0') { if (strlcat(rpath, "-", sizeof(rpath)) >= sizeof(rpath)) fatal("string truncation cvs_initlog"); if (strlcat(rpath, fpath, sizeof(rpath)) >= sizeof(rpath)) fatal("string truncation in cvs_initlog"); } } for (i = 0; i < UINT_MAX; i++) { l = snprintf(fpath, sizeof(fpath), "%s-%d.in", rpath, i); if (l == -1 || l >= (int)sizeof(fpath)) fatal("overflow in cvs_initlog()"); if (stat(fpath, &st) != -1) continue; if (errno != ENOENT) fatal("cvs_initlog() stat failed '%s'", strerror(errno)); break; } cvs_server_inlog = fopen(fpath, "w"); if (cvs_server_inlog == NULL) fatal("failed to open server input log `%s'", fpath); for (i = 0; i < UINT_MAX; i++) { l = snprintf(fpath, sizeof(fpath), "%s-%d.out", rpath, i); if (l == -1 || l >= (int)sizeof(fpath)) fatal("overflow in cvs_initlog()"); if (stat(fpath, &st) != -1) continue; if (errno != ENOENT) fatal("cvs_initlog() stat failed '%s'", strerror(errno)); break; } cvs_server_outlog = fopen(fpath, "w"); if (cvs_server_outlog == NULL) fatal("failed to open server output log `%s'", fpath); /* make the streams line-buffered */ setvbuf(cvs_server_inlog, NULL, _IOLBF, (size_t)0); setvbuf(cvs_server_outlog, NULL, _IOLBF, (size_t)0); cvs_server_logon = 1; }