repos.c revision 128266
1/* 2 * Copyright (c) 1992, Brian Berliner and Jeff Polk 3 * Copyright (c) 1989-1992, Brian Berliner 4 * 5 * You may distribute under the terms of the GNU General Public License as 6 * specified in the README file that comes with the CVS source distribution. 7 */ 8 9#include <assert.h> 10#include "cvs.h" 11#include "getline.h" 12 13/* Determine the name of the RCS repository for directory DIR in the 14 current working directory, or for the current working directory 15 itself if DIR is NULL. Returns the name in a newly-malloc'd 16 string. On error, gives a fatal error and does not return. 17 UPDATE_DIR is the path from where cvs was invoked (for use in error 18 messages), and should contain DIR as its last component. 19 UPDATE_DIR can be NULL to signify the directory in which cvs was 20 invoked. */ 21 22char * 23Name_Repository (dir, update_dir) 24 const char *dir; 25 const char *update_dir; 26{ 27 FILE *fpin; 28 const char *xupdate_dir; 29 char *repos = NULL; 30 size_t repos_allocated = 0; 31 char *tmp; 32 char *cp; 33 34 if (update_dir && *update_dir) 35 xupdate_dir = update_dir; 36 else 37 xupdate_dir = "."; 38 39 if (dir != NULL) 40 { 41 tmp = xmalloc (strlen (dir) + sizeof (CVSADM_REP) + 10); 42 (void) sprintf (tmp, "%s/%s", dir, CVSADM_REP); 43 } 44 else 45 tmp = xstrdup (CVSADM_REP); 46 47 /* 48 * The assumption here is that the repository is always contained in the 49 * first line of the "Repository" file. 50 */ 51 fpin = CVS_FOPEN (tmp, "r"); 52 53 if (fpin == NULL) 54 { 55 int save_errno = errno; 56 char *cvsadm; 57 58 if (dir != NULL) 59 { 60 cvsadm = xmalloc (strlen (dir) + sizeof (CVSADM) + 10); 61 (void) sprintf (cvsadm, "%s/%s", dir, CVSADM); 62 } 63 else 64 cvsadm = xstrdup (CVSADM); 65 66 if (!isdir (cvsadm)) 67 { 68 error (0, 0, "in directory %s:", xupdate_dir); 69 error (1, 0, "there is no version here; do '%s checkout' first", 70 program_name); 71 } 72 free (cvsadm); 73 74 if (existence_error (save_errno)) 75 { 76 /* FIXME: This is a very poorly worded error message. It 77 occurs at least in the case where the user manually 78 creates a directory named CVS, so the error message 79 should be more along the lines of "CVS directory found 80 without administrative files; use CVS to create the CVS 81 directory, or rename it to something else if the 82 intention is to store something besides CVS 83 administrative files". */ 84 error (0, 0, "in directory %s:", xupdate_dir); 85 error (1, 0, "*PANIC* administration files missing"); 86 } 87 88 error (1, save_errno, "cannot open %s", tmp); 89 } 90 91 if (getline (&repos, &repos_allocated, fpin) < 0) 92 { 93 /* FIXME: should be checking for end of file separately. */ 94 error (0, 0, "in directory %s:", xupdate_dir); 95 error (1, errno, "cannot read %s", CVSADM_REP); 96 } 97 if (fclose (fpin) < 0) 98 error (0, errno, "cannot close %s", tmp); 99 free (tmp); 100 101 if ((cp = strrchr (repos, '\n')) != NULL) 102 *cp = '\0'; /* strip the newline */ 103 104 /* 105 * If this is a relative repository pathname, turn it into an absolute 106 * one by tacking on the CVSROOT environment variable. If the CVSROOT 107 * environment variable is not set, die now. 108 */ 109 if (! isabsolute(repos)) 110 { 111 char *newrepos; 112 113 if (current_parsed_root == NULL) 114 { 115 error (0, 0, "in directory %s:", xupdate_dir); 116 error (0, 0, "must set the CVSROOT environment variable\n"); 117 error (0, 0, "or specify the '-d' option to %s.", program_name); 118 error (1, 0, "illegal repository setting"); 119 } 120 if (pathname_levels (repos) > 0) 121 { 122 error (0, 0, "in directory %s:", xupdate_dir); 123 error (0, 0, "`..'-relative repositories are not supported."); 124 error (1, 0, "illegal source repository"); 125 } 126 newrepos = xmalloc (strlen (current_parsed_root->directory) 127 + strlen (repos) + 2); 128 sprintf (newrepos, "%s/%s", current_parsed_root->directory, repos); 129 free (repos); 130 repos = newrepos; 131 } 132 133 Sanitize_Repository_Name (repos); 134 135 return repos; 136} 137 138 139 140/* 141 * Return a pointer to the repository name relative to CVSROOT from a 142 * possibly fully qualified repository 143 */ 144const char * 145Short_Repository (repository) 146 const char *repository; 147{ 148 if (repository == NULL) 149 return NULL; 150 151 /* If repository matches CVSroot at the beginning, strip off CVSroot */ 152 /* And skip leading '/' in rep, in case CVSroot ended with '/'. */ 153 if (strncmp (current_parsed_root->directory, repository, 154 strlen (current_parsed_root->directory)) == 0) 155 { 156 const char *rep = repository + strlen (current_parsed_root->directory); 157 return (*rep == '/') ? rep+1 : rep; 158 } 159 else 160 return repository; 161} 162 163 164 165/* Sanitize the repository name (in place) by removing trailing 166 * slashes and a trailing "." if present. It should be safe for 167 * callers to use strcat and friends to create repository names. 168 * Without this check, names like "/path/to/repos/./foo" and 169 * "/path/to/repos//foo" would be created. For example, one 170 * significant case is the CVSROOT-detection code in commit.c. It 171 * decides whether or not it needs to rebuild the administrative file 172 * database by doing a string compare. If we've done a `cvs co .' to 173 * get the CVSROOT files, "/path/to/repos/./CVSROOT" and 174 * "/path/to/repos/CVSROOT" are the arguments that are compared! 175 * 176 * This function ends up being called from the same places as 177 * strip_path, though what it does is much more conservative. Many 178 * comments about this operation (which was scattered around in 179 * several places in the source code) ran thus: 180 * 181 * ``repository ends with "/."; omit it. This sort of thing used 182 * to be taken care of by strip_path. Now we try to be more 183 * selective. I suspect that it would be even better to push it 184 * back further someday, so that the trailing "/." doesn't get into 185 * repository in the first place, but we haven't taken things that 186 * far yet.'' --Jim Kingdon (recurse.c, 07-Sep-97) 187 */ 188 189void 190Sanitize_Repository_Name (repository) 191 char *repository; 192{ 193 size_t len; 194 195 assert (repository != NULL); 196 197 strip_trailing_slashes (repository); 198 199 len = strlen (repository); 200 if (len >= 2 201 && repository[len - 1] == '.' 202 && ISDIRSEP (repository[len - 2])) 203 { 204 repository[len - 2] = '\0'; 205 } 206} 207