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 * No Difference 14 * 15 * The user file looks modified judging from its time stamp; however it needn't 16 * be. No_Difference() finds out whether it is or not. If it is not, it 17 * updates the administration. 18 * 19 * returns 0 if no differences are found and non-zero otherwise 20 */ 21 22 #include "cvs.h" 23 #include <assert.h> 24 25 int 26 No_Difference (struct file_info *finfo, Vers_TS *vers) 27 { 28 Node *p; 29 int ret; 30 char *ts, *options; 31 int retcode = 0; 32 char *tocvsPath; 33 34 /* If ts_user is "Is-modified", we can only conclude the files are 35 different (since we don't have the file's contents). */ 36 if (vers->ts_user != NULL 37 && strcmp (vers->ts_user, "Is-modified") == 0) 38 return -1; 39 40 if (!vers->srcfile || !vers->srcfile->path) 41 return (-1); /* different since we couldn't tell */ 42 43 #ifdef PRESERVE_PERMISSIONS_SUPPORT 44 /* If special files are in use, then any mismatch of file metadata 45 information also means that the files should be considered different. */ 46 if (preserve_perms && special_file_mismatch (finfo, vers->vn_user, NULL)) 47 return 1; 48 #endif 49 50 if (vers->entdata && vers->entdata->options) 51 options = xstrdup (vers->entdata->options); 52 else 53 options = xstrdup (""); 54 55 tocvsPath = wrap_tocvs_process_file (finfo->file); 56 retcode = RCS_cmp_file (vers->srcfile, vers->vn_user, NULL, NULL, options, 57 tocvsPath == NULL ? finfo->file : tocvsPath); 58 if (retcode == 0) 59 { 60 /* no difference was found, so fix the entries file */ 61 ts = time_stamp (finfo->file); 62 Register (finfo->entries, finfo->file, 63 vers->vn_user ? vers->vn_user : vers->vn_rcs, ts, 64 options, vers->tag, vers->date, NULL); 65 #ifdef SERVER_SUPPORT 66 if (server_active) 67 { 68 /* We need to update the entries line on the client side. */ 69 server_update_entries (finfo->file, finfo->update_dir, 70 finfo->repository, SERVER_UPDATED); 71 } 72 #endif 73 free (ts); 74 75 /* update the entdata pointer in the vers_ts structure */ 76 p = findnode (finfo->entries, finfo->file); 77 assert (p); 78 vers->entdata = p->data; 79 80 ret = 0; 81 } 82 else 83 ret = 1; /* files were really different */ 84 85 if (tocvsPath) 86 { 87 /* Need to call unlink myself because the noexec variable 88 * has been set to 1. */ 89 TRACE (TRACE_FUNCTION, "unlink (%s)", tocvsPath); 90 if ( CVS_UNLINK (tocvsPath) < 0) 91 error (0, errno, "could not remove %s", tocvsPath); 92 } 93 94 free (options); 95 return ret; 96 } 97