/* $OpenBSD: resp.c,v 1.18 2004/12/13 22:53:48 jfb Exp $ */ /* * Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org> * 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. */ #include <sys/types.h> #include <sys/stat.h> #include <sys/time.h> #include <fcntl.h> #include <stdio.h> #include <errno.h> #include <dirent.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <libgen.h> #include <sysexits.h> #include "buf.h" #include "cvs.h" #include "log.h" #include "file.h" #include "proto.h" #define CVS_MTSTK_MAXDEPTH 16 #define STRIP_SLASH(p) \ do { \ size_t len; \ len = strlen(p); \ while ((len > 0) && (p[len - 1] == '/')) \ p[--len] = '\0'; \ } while (0) static int cvs_resp_validreq (struct cvsroot *, int, char *); static int cvs_resp_cksum (struct cvsroot *, int, char *); static int cvs_resp_modtime (struct cvsroot *, int, char *); static int cvs_resp_m (struct cvsroot *, int, char *); static int cvs_resp_ok (struct cvsroot *, int, char *); static int cvs_resp_error (struct cvsroot *, int, char *); static int cvs_resp_statdir (struct cvsroot *, int, char *); static int cvs_resp_sticky (struct cvsroot *, int, char *); static int cvs_resp_newentry (struct cvsroot *, int, char *); static int cvs_resp_updated (struct cvsroot *, int, char *); static int cvs_resp_removed (struct cvsroot *, int, char *); static int cvs_resp_mode (struct cvsroot *, int, char *); static int cvs_resp_modxpand (struct cvsroot *, int, char *); static int cvs_resp_rcsdiff (struct cvsroot *, int, char *); static int cvs_resp_template (struct cvsroot *, int, char *); static int cvs_resp_copyfile (struct cvsroot *, int, char *); struct cvs_resphdlr { int (*hdlr)(struct cvsroot *, int, char *); } cvs_resp_swtab[CVS_RESP_MAX + 1] = { { NULL }, { cvs_resp_ok }, { cvs_resp_error }, { cvs_resp_validreq }, { cvs_resp_newentry }, { cvs_resp_newentry }, { cvs_resp_cksum }, { cvs_resp_copyfile }, { cvs_resp_updated }, { cvs_resp_updated }, { cvs_resp_updated }, /* 10 */ { cvs_resp_updated }, { cvs_resp_updated }, { cvs_resp_rcsdiff }, { cvs_resp_mode }, { cvs_resp_modtime }, { cvs_resp_removed }, { cvs_resp_removed }, { cvs_resp_statdir }, { cvs_resp_statdir }, { cvs_resp_sticky }, /* 20 */ { cvs_resp_sticky }, { cvs_resp_template }, { NULL }, { NULL }, { NULL }, { cvs_resp_modxpand }, { NULL }, { cvs_resp_m }, { cvs_resp_m }, { cvs_resp_m }, /* 30 */ { cvs_resp_m }, { cvs_resp_m }, }; /* * The MT command uses scoping to tag the data. Whenever we encouter a '+', * we push the name of the tag on the stack, and we pop it when we encounter * a '-' with the same name. */ static char *cvs_mt_stack[CVS_MTSTK_MAXDEPTH]; static u_int cvs_mtstk_depth = 0; static time_t cvs_modtime = CVS_DATE_DMSEC; /* last checksum received */ char *cvs_fcksum = NULL; mode_t cvs_lastmode = 0; /* hack to receive the remote version without outputting it */ extern u_int cvs_version_sent; /* * cvs_resp_handle() * * Generic response handler dispatcher. The handler expects the first line * of the command as single argument. * Returns the return value of the command on success, or -1 on failure. */ int cvs_resp_handle(struct cvsroot *root, char *line) { int ret; char *cp, *cmd; struct cvs_resp *resp; cmd = line; cp = strchr(cmd, ' '); if (cp != NULL) *(cp++) = '\0'; resp = cvs_resp_getbyname(cmd); if (resp == NULL) { return (-1); } else if (cvs_resp_swtab[resp->resp_id].hdlr == NULL) { cvs_log(LP_ERRNO, "handler for `%s' not implemented", cmd); return (-1); } ret = (*cvs_resp_swtab[resp->resp_id].hdlr)(root, resp->resp_id, cp); if (ret == -1) cvs_log(LP_ERR, "error in handling of `%s' response", cmd); return (ret); } /* * cvs_resp_validreq() * * Handler for the `Valid-requests' response. The list of valid requests is * split on spaces and each request's entry in the valid request array is set * to 1 to indicate the validity. * Returns 0 on success, or -1 on failure. */ static int cvs_resp_validreq(struct cvsroot *root, int type, char *line) { char *sp, *ep; struct cvs_req *req; /* parse the requests */ sp = line; do { ep = strchr(sp, ' '); if (ep != NULL) *ep = '\0'; req = cvs_req_getbyname(sp); if (req != NULL) CVS_SETVR(root, req->req_id); if (ep != NULL) sp = ep + 1; } while (ep != NULL); return (0); } /* * cvs_resp_m() * * Handler for the `M', 'MT', `F' and `E' responses. */ static int cvs_resp_m(struct cvsroot *root, int type, char *line) { char *cp; FILE *stream; stream = NULL; switch (type) { case CVS_RESP_F: fflush(stderr); return (0); case CVS_RESP_M: if (cvs_version_sent) { /* * Instead of outputting the line, we save it as the * remote server's version string. */ cvs_version_sent = 0; root->cr_version = strdup(line); return (0); } stream = stdout; break; case CVS_RESP_E: stream = stderr; break; case CVS_RESP_MT: if (*line == '+') { if (cvs_mtstk_depth == CVS_MTSTK_MAXDEPTH) { cvs_log(LP_ERR, "MT scope stack has reached max depth"); return (-1); } cvs_mt_stack[cvs_mtstk_depth] = strdup(line + 1); if (cvs_mt_stack[cvs_mtstk_depth] == NULL) return (-1); cvs_mtstk_depth++; } else if (*line == '-') { if (cvs_mtstk_depth == 0) { cvs_log(LP_ERR, "MT scope stack underflow"); return (-1); } else if (strcmp(line + 1, cvs_mt_stack[cvs_mtstk_depth - 1]) != 0) { cvs_log(LP_ERR, "mismatch in MT scope stack"); return (-1); } free(cvs_mt_stack[cvs_mtstk_depth--]); } else { if (strcmp(line, "newline") == 0) putc('\n', stdout); else if (strncmp(line, "fname ", 6) == 0) printf("%s", line + 6); else { /* assume text */ cp = strchr(line, ' '); if (cp != NULL) printf("%s", cp + 1); } } return (0); case CVS_RESP_MBINARY: cvs_log(LP_WARN, "Mbinary not supported in client yet"); break; } fputs(line, stream); fputc('\n', stream); return (0); } /* * cvs_resp_ok() * * Handler for the `ok' response. This handler's job is to */ static int cvs_resp_ok(struct cvsroot *root, int type, char *line) { return (1); } /* * cvs_resp_error() * * Handler for the `error' response. This handler's job is to */ static int cvs_resp_error(struct cvsroot *root, int type, char *line) { fprintf(stderr, "%s\n", line); return (1); } /* * cvs_resp_statdir() * * Handler for the `Clear-static-directory' and `Set-static-directory' * responses. */ static int cvs_resp_statdir(struct cvsroot *root, int type, char *line) { int fd; char rpath[MAXPATHLEN], statpath[MAXPATHLEN]; /* remote directory line */ if (cvs_getln(root, rpath, sizeof(rpath)) < 0) return (-1); snprintf(statpath, sizeof(statpath), "%s/%s", line, CVS_PATH_STATICENTRIES); if ((type == CVS_RESP_CLRSTATDIR) && (unlink(statpath) == -1) && (errno != ENOENT)) { cvs_log(LP_ERRNO, "failed to unlink %s file", CVS_PATH_STATICENTRIES); return (-1); } else if (type == CVS_RESP_SETSTATDIR) { fd = open(statpath, O_CREAT|O_TRUNC|O_WRONLY, 0400); if (fd == -1) { cvs_log(LP_ERRNO, "failed to set static directory on %s", line); return (-1); } (void)close(fd); } return (0); } /* * cvs_resp_sticky() * * Handler for the `Clear-sticky' and `Set-sticky' responses. If the * specified directory doesn't exist, we create it and attach it to the * global file structure. */ static int cvs_resp_sticky(struct cvsroot *root, int type, char *line) { char buf[MAXPATHLEN], subdir[MAXPATHLEN], *file; struct cvs_ent *ent; CVSFILE *cf, *sdir; /* get the remote path */ if (cvs_getln(root, buf, sizeof(buf)) < 0) return (-1); STRIP_SLASH(line); cvs_splitpath(line, subdir, sizeof(subdir), &file); sdir = cvs_file_find(cvs_files, subdir); if (sdir == NULL) { cvs_log(LP_ERR, "failed to find %s", subdir); return (-1); } cf = cvs_file_find(sdir, file); if (cf == NULL) { /* attempt to create it */ cf = cvs_file_create(sdir, line, DT_DIR, 0755); if (cf == NULL) return (-1); cf->cf_ddat->cd_repo = strdup(line); cf->cf_ddat->cd_root = root; root->cr_ref++; cvs_file_attach(sdir, cf); /* add a directory entry to the parent */ if (CVS_DIR_ENTRIES(sdir) != NULL) { snprintf(buf, sizeof(buf), "D/%s////", CVS_FILE_NAME(cf)); ent = cvs_ent_parse(buf); if (ent == NULL) cvs_log(LP_ERR, "failed to create directory entry"); else cvs_ent_add(CVS_DIR_ENTRIES(sdir), ent); } } if (type == CVS_RESP_CLRSTICKY) cf->cf_ddat->cd_flags &= ~CVS_DIRF_STICKY; else if (type == CVS_RESP_SETSTICKY) cf->cf_ddat->cd_flags |= CVS_DIRF_STICKY; return (0); } /* * cvs_resp_newentry() * * Handler for the `New-entry' response and `Checked-in' responses. * In the case of `New-entry', we expect the entry line */ static int cvs_resp_newentry(struct cvsroot *root, int type, char *line) { char entbuf[128]; struct cvs_ent *ent; CVSENTRIES *entfile; /* get the remote path */ cvs_getln(root, entbuf, sizeof(entbuf)); /* get the new Entries line */ if (cvs_getln(root, entbuf, sizeof(entbuf)) < 0) return (-1); entfile = cvs_ent_open(line, O_WRONLY); if (entfile == NULL) return (-1); if (type == CVS_RESP_NEWENTRY) { cvs_ent_addln(entfile, entbuf); } else if (type == CVS_RESP_CHECKEDIN) { ent = cvs_ent_parse(entbuf); if (ent == NULL) { cvs_log(LP_ERR, "failed to parse entry"); cvs_ent_close(entfile); return (-1); } /* timestamp it to now */ ent->ce_mtime = time(&(ent->ce_mtime)); /* replace the current entry with the one we just received */ if (cvs_ent_remove(entfile, ent->ce_name) < 0) cvs_log(LP_WARN, "failed to remove `%s' entry", ent->ce_name); cvs_ent_add(entfile, ent); } cvs_ent_close(entfile); return (0); } /* * cvs_resp_cksum() * * Handler for the `Checksum' response. We store the checksum received for * the next file in a dynamically-allocated buffer pointed to by <cvs_fcksum>. * Upon next file reception, the handler checks to see if there is a stored * checksum. * The file handler must make sure that the checksums match and free the * checksum buffer once it's done to indicate there is no further checksum. */ static int cvs_resp_cksum(struct cvsroot *root, int type, char *line) { if (cvs_fcksum != NULL) { cvs_log(LP_WARN, "unused checksum"); free(cvs_fcksum); } cvs_fcksum = strdup(line); if (cvs_fcksum == NULL) { cvs_log(LP_ERRNO, "failed to copy checksum string"); return (-1); } return (0); } /* * cvs_resp_copyfile() * * Handler for the `Copy-file' response, which is used to copy the contents * of a file to another file for which the name is provided. The CVS protocol * documentation states that this response is only used prior to a `Merged' * response to create a backup of the file. */ static int cvs_resp_copyfile(struct cvsroot *root, int type, char *line) { char path[MAXPATHLEN], newpath[MAXPATHLEN], newname[MAXNAMLEN], *file; /* read the remote path of the file to copy and its new name */ if ((cvs_getln(root, path, sizeof(path)) < 0) || (cvs_getln(root, newname, sizeof(newname)) < 0)) return (-1); if ((file = basename(path)) == NULL) { cvs_log(LP_ERR, "no base file name in Copy-file path"); return (-1); } snprintf(path, sizeof(path), "%s%s", line, file); snprintf(newpath, sizeof(newpath), "%s%s", line, newname); if (rename(path, newpath) == -1) { cvs_log(LP_ERRNO, "failed to rename %s to %s", line, newname); return (-1); } return (0); } /* * cvs_resp_modtime() * * Handler for the `Mod-time' file update modifying response. The timestamp * given is used to set the last modification time on the next file that * will be received. */ static int cvs_resp_modtime(struct cvsroot *root, int type, char *line) { cvs_modtime = cvs_datesec(line, CVS_DATE_RFC822, 1); return (0); } /* * cvs_resp_updated() * * Handler for the `Updated', `Update-existing', `Created', `Merged' and * `Patched' responses, which all have a very similar format. */ static int cvs_resp_updated(struct cvsroot *root, int type, char *line) { int ret; mode_t fmode; char path[MAXPATHLEN], cksum_buf[CVS_CKSUM_LEN]; BUF *fbuf; CVSENTRIES *entfile; struct cvs_ent *ep; struct timeval tv[2]; ret = 0; STRIP_SLASH(line); /* read the remote path of the file */ if (cvs_getln(root, path, sizeof(path)) < 0) return (-1); /* read the new entry */ if (cvs_getln(root, path, sizeof(path)) < 0) return (-1); if ((ep = cvs_ent_parse(path)) == NULL) return (-1); snprintf(path, sizeof(path), "%s/%s", line, ep->ce_name); entfile = cvs_ent_open(line, O_WRONLY); if (entfile == NULL) { cvs_ent_free(ep); return (-1); } if (cvs_modtime != CVS_DATE_DMSEC) { ep->ce_mtime = cvs_modtime; cvs_modtime = CVS_DATE_DMSEC; /* invalidate */ } else ep->ce_mtime = time(&(ep->ce_mtime)); if ((type == CVS_RESP_UPDEXIST) || (type == CVS_RESP_UPDATED) || (type == CVS_RESP_MERGED) || (type == CVS_RESP_CREATED)) { if (cvs_ent_remove(entfile, ep->ce_name) < 0) cvs_log(LP_WARN, "failed to remove entry for `%s'", ep->ce_name); } if (cvs_ent_add(entfile, ep) < 0) { cvs_ent_free(ep); cvs_ent_close(entfile); return (-1); } cvs_ent_close(entfile); if ((fbuf = cvs_recvfile(root, &fmode)) == NULL) return (-1); if (cvs_buf_write(fbuf, path, fmode) < 0) { cvs_buf_free(fbuf); return (-1); } cvs_buf_free(fbuf); if (cvs_modtime != CVS_DATE_DMSEC) { tv[0].tv_sec = (long)cvs_modtime; tv[0].tv_usec = 0; tv[1].tv_sec = (long)cvs_modtime; tv[1].tv_usec = 0; if (utimes(path, tv) == -1) cvs_log(LP_ERRNO, "failed to set file timestamps"); } /* now see if there is a checksum */ if (cvs_fcksum != NULL) { if (cvs_cksum(path, cksum_buf, sizeof(cksum_buf)) < 0) ret = -1; else if (strcmp(cksum_buf, cvs_fcksum) != 0) { cvs_log(LP_ERR, "checksum error on received file"); (void)unlink(line); ret = -1; } free(cvs_fcksum); cvs_fcksum = NULL; } return (ret); } /* * cvs_resp_removed() * * Handler for the `Removed' and `Remove-entry' responses. The `Removed' * response is received when both a file and its entry need to be removed from * the local copy. The `Remove-entry' is received in cases where the file is * already gone but there is still an entry to remove in the Entries file. */ static int cvs_resp_removed(struct cvsroot *root, int type, char *line) { char base[MAXPATHLEN], *file; CVSENTRIES *ef; cvs_splitpath(line, base, sizeof(base), &file); ef = cvs_ent_open(base, O_RDWR); if (ef == NULL) { cvs_log(LP_ERR, "error handling `Removed' response"); if (type == CVS_RESP_RMENTRY) return (-1); } else { (void)cvs_ent_remove(ef, file); cvs_ent_close(ef); } if ((type == CVS_RESP_REMOVED) && (unlink(line) == -1)) { cvs_log(LP_ERRNO, "failed to unlink `%s'", line); return (-1); } return (0); } /* * cvs_resp_mode() * * Handler for the `Mode' response. */ static int cvs_resp_mode(struct cvsroot *root, int type, char *line) { if (cvs_strtomode(line, &cvs_lastmode) < 0) { cvs_log(LP_ERR, "error handling Mode response"); return (-1); } return (0); } /* * cvs_resp_modxpand() * * Handler for the `Module-expansion' response. */ static int cvs_resp_modxpand(struct cvsroot *root, int type, char *line) { return (0); } /* * cvs_resp_rcsdiff() * * Handler for the `Rcs-diff' response. */ static int cvs_resp_rcsdiff(struct cvsroot *root, int type, char *line) { char file[MAXPATHLEN], buf[MAXPATHLEN], cksum_buf[CVS_CKSUM_LEN]; char *fname, *orig, *patch; mode_t fmode; BUF *res, *fcont, *patchbuf; CVSENTRIES *entf; struct cvs_ent *ent; /* get remote path and build local path of file to be patched */ cvs_getln(root, buf, sizeof(buf)); fname = strrchr(buf, '/'); if (fname == NULL) fname = buf; snprintf(file, sizeof(file), "%s%s", line, fname); /* get updated entry fields */ cvs_getln(root, buf, sizeof(buf)); ent = cvs_ent_parse(buf); if (ent == NULL) return (-1); patchbuf = cvs_recvfile(root, &fmode); fcont = cvs_buf_load(file, BUF_AUTOEXT); if (fcont == NULL) return (-1); cvs_buf_putc(patchbuf, '\0'); cvs_buf_putc(fcont, '\0'); orig = cvs_buf_release(fcont); patch = cvs_buf_release(patchbuf); res = rcs_patch(orig, patch); if (res == NULL) return (-1); cvs_buf_write(res, file, fmode); /* now see if there is a checksum */ if (cvs_fcksum != NULL) { if (cvs_cksum(file, cksum_buf, sizeof(cksum_buf)) < 0) { } if (strcmp(cksum_buf, cvs_fcksum) != 0) { cvs_log(LP_ERR, "checksum error on received file"); (void)unlink(file); } free(cvs_fcksum); cvs_fcksum = NULL; } /* update revision in entries */ entf = cvs_ent_open(line, O_WRONLY); if (entf == NULL) return (-1); cvs_ent_close(entf); return (0); } /* * cvs_resp_template() * * Handler for the `Template' response. */ static int cvs_resp_template(struct cvsroot *root, int type, char *line) { mode_t mode; BUF *tmpl; tmpl = cvs_recvfile(root, &mode); if (tmpl == NULL) return (-1); return (0); }