repos.c revision 175261
1/* 2 * Copyright (C) 1986-2005 The Free Software Foundation, Inc. 3 * 4 * Portions Copyright (C) 1998-2005 Derek Price, Ximbiot <http://ximbiot.com>, 5 * and others. 6 * 7 * Portions Copyright (C) 1992, Brian Berliner and Jeff Polk 8 * Portions Copyright (C) 1989-1992, Brian Berliner 9 * 10 * You may distribute under the terms of the GNU General Public License as 11 * specified in the README file that comes with the CVS source distribution. 12 */ 13 14#include <assert.h> 15#include "cvs.h" 16#include "getline.h" 17 18/* Determine the name of the RCS repository for directory DIR in the 19 current working directory, or for the current working directory 20 itself if DIR is NULL. Returns the name in a newly-malloc'd 21 string. On error, gives a fatal error and does not return. 22 UPDATE_DIR is the path from where cvs was invoked (for use in error 23 messages), and should contain DIR as its last component. 24 UPDATE_DIR can be NULL to signify the directory in which cvs was 25 invoked. */ 26 27char * 28Name_Repository (dir, update_dir) 29 const char *dir; 30 const char *update_dir; 31{ 32 FILE *fpin; 33 const char *xupdate_dir; 34 char *repos = NULL; 35 size_t repos_allocated = 0; 36 char *tmp; 37 char *cp; 38 39 if (update_dir && *update_dir) 40 xupdate_dir = update_dir; 41 else 42 xupdate_dir = "."; 43 44 if (dir != NULL) 45 { 46 tmp = xmalloc (strlen (dir) + sizeof (CVSADM_REP) + 10); 47 (void) sprintf (tmp, "%s/%s", dir, CVSADM_REP); 48 } 49 else 50 tmp = xstrdup (CVSADM_REP); 51 52 /* 53 * The assumption here is that the repository is always contained in the 54 * first line of the "Repository" file. 55 */ 56 fpin = CVS_FOPEN (tmp, "r"); 57 58 if (fpin == NULL) 59 { 60 int save_errno = errno; 61 char *cvsadm; 62 63 if (dir != NULL) 64 { 65 cvsadm = xmalloc (strlen (dir) + sizeof (CVSADM) + 10); 66 (void) sprintf (cvsadm, "%s/%s", dir, CVSADM); 67 } 68 else 69 cvsadm = xstrdup (CVSADM); 70 71 if (!isdir (cvsadm)) 72 { 73 error (0, 0, "in directory %s:", xupdate_dir); 74 error (1, 0, "there is no version here; do '%s checkout' first", 75 program_name); 76 } 77 free (cvsadm); 78 79 if (existence_error (save_errno)) 80 { 81 /* FIXME: This is a very poorly worded error message. It 82 occurs at least in the case where the user manually 83 creates a directory named CVS, so the error message 84 should be more along the lines of "CVS directory found 85 without administrative files; use CVS to create the CVS 86 directory, or rename it to something else if the 87 intention is to store something besides CVS 88 administrative files". */ 89 error (0, 0, "in directory %s:", xupdate_dir); 90 error (1, 0, "*PANIC* administration files missing"); 91 } 92 93 error (1, save_errno, "cannot open %s", tmp); 94 } 95 96 if (getline (&repos, &repos_allocated, fpin) < 0) 97 { 98 /* FIXME: should be checking for end of file separately. */ 99 error (0, 0, "in directory %s:", xupdate_dir); 100 error (1, errno, "cannot read %s", CVSADM_REP); 101 } 102 if (fclose (fpin) < 0) 103 error (0, errno, "cannot close %s", tmp); 104 free (tmp); 105 106 if ((cp = strrchr (repos, '\n')) != NULL) 107 *cp = '\0'; /* strip the newline */ 108 109 /* 110 * If this is a relative repository pathname, turn it into an absolute 111 * one by tacking on the CVSROOT environment variable. If the CVSROOT 112 * environment variable is not set, die now. 113 */ 114 if (! isabsolute(repos)) 115 { 116 char *newrepos; 117 118 if (current_parsed_root == NULL) 119 { 120 error (0, 0, "in directory %s:", xupdate_dir); 121 error (0, 0, "must set the CVSROOT environment variable\n"); 122 error (0, 0, "or specify the '-d' option to %s.", program_name); 123 error (1, 0, "illegal repository setting"); 124 } 125 if (pathname_levels (repos) > 0) 126 { 127 error (0, 0, "in directory %s:", xupdate_dir); 128 error (0, 0, "`..'-relative repositories are not supported."); 129 error (1, 0, "illegal source repository"); 130 } 131 newrepos = xmalloc (strlen (current_parsed_root->directory) 132 + strlen (repos) + 2); 133 sprintf (newrepos, "%s/%s", current_parsed_root->directory, repos); 134 free (repos); 135 repos = newrepos; 136 } 137 138 Sanitize_Repository_Name (repos); 139 140 return repos; 141} 142 143 144 145/* 146 * Return a pointer to the repository name relative to CVSROOT from a 147 * possibly fully qualified repository 148 */ 149const char * 150Short_Repository (repository) 151 const char *repository; 152{ 153 if (repository == NULL) 154 return NULL; 155 156 /* If repository matches CVSroot at the beginning, strip off CVSroot */ 157 /* And skip leading '/' in rep, in case CVSroot ended with '/'. */ 158 if (strncmp (current_parsed_root->directory, repository, 159 strlen (current_parsed_root->directory)) == 0) 160 { 161 const char *rep = repository + strlen (current_parsed_root->directory); 162 return (*rep == '/') ? rep+1 : rep; 163 } 164 else 165 return repository; 166} 167 168 169 170/* Sanitize the repository name (in place) by removing trailing 171 * slashes and a trailing "." if present. It should be safe for 172 * callers to use strcat and friends to create repository names. 173 * Without this check, names like "/path/to/repos/./foo" and 174 * "/path/to/repos//foo" would be created. For example, one 175 * significant case is the CVSROOT-detection code in commit.c. It 176 * decides whether or not it needs to rebuild the administrative file 177 * database by doing a string compare. If we've done a `cvs co .' to 178 * get the CVSROOT files, "/path/to/repos/./CVSROOT" and 179 * "/path/to/repos/CVSROOT" are the arguments that are compared! 180 * 181 * This function ends up being called from the same places as 182 * strip_path, though what it does is much more conservative. Many 183 * comments about this operation (which was scattered around in 184 * several places in the source code) ran thus: 185 * 186 * ``repository ends with "/."; omit it. This sort of thing used 187 * to be taken care of by strip_path. Now we try to be more 188 * selective. I suspect that it would be even better to push it 189 * back further someday, so that the trailing "/." doesn't get into 190 * repository in the first place, but we haven't taken things that 191 * far yet.'' --Jim Kingdon (recurse.c, 07-Sep-97) 192 */ 193 194void 195Sanitize_Repository_Name (repository) 196 char *repository; 197{ 198 size_t len; 199 200 assert (repository != NULL); 201 202 strip_trailing_slashes (repository); 203 204 len = strlen (repository); 205 if (len >= 2 206 && repository[len - 1] == '.' 207 && ISDIRSEP (repository[len - 2])) 208 { 209 repository[len - 2] = '\0'; 210 } 211} 212