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 25int 26No_Difference (finfo, vers) 27 struct file_info *finfo; 28 Vers_TS *vers; 29{ 30 Node *p; 31 int ret; 32 char *ts, *options; 33 int retcode = 0; 34 char *tocvsPath; 35 36 /* If ts_user is "Is-modified", we can only conclude the files are 37 different (since we don't have the file's contents). */ 38 if (vers->ts_user != NULL 39 && strcmp (vers->ts_user, "Is-modified") == 0) 40 return -1; 41 42 if (!vers->srcfile || !vers->srcfile->path) 43 return (-1); /* different since we couldn't tell */ 44 45#ifdef PRESERVE_PERMISSIONS_SUPPORT 46 /* If special files are in use, then any mismatch of file metadata 47 information also means that the files should be considered different. */ 48 if (preserve_perms && special_file_mismatch (finfo, vers->vn_user, NULL)) 49 return 1; 50#endif 51 52 if (vers->entdata && vers->entdata->options) 53 options = xstrdup (vers->entdata->options); 54 else 55 options = xstrdup (""); 56 57 tocvsPath = wrap_tocvs_process_file (finfo->file); 58 retcode = RCS_cmp_file( vers->srcfile, vers->vn_user, (char **)NULL, 59 (char *)NULL, options, 60 tocvsPath == NULL ? finfo->file : tocvsPath ); 61 if (retcode == 0) 62 { 63 /* no difference was found, so fix the entries file */ 64 ts = time_stamp (finfo->file); 65 Register (finfo->entries, finfo->file, 66 vers->vn_user ? vers->vn_user : vers->vn_rcs, ts, 67 options, vers->tag, vers->date, (char *) 0); 68#ifdef SERVER_SUPPORT 69 if (server_active) 70 { 71 /* We need to update the entries line on the client side. */ 72 server_update_entries 73 (finfo->file, finfo->update_dir, finfo->repository, SERVER_UPDATED); 74 } 75#endif 76 free (ts); 77 78 /* update the entdata pointer in the vers_ts structure */ 79 p = findnode (finfo->entries, finfo->file); 80 assert (p); 81 vers->entdata = p->data; 82 83 ret = 0; 84 } 85 else 86 ret = 1; /* files were really different */ 87 88 if (tocvsPath) 89 { 90 /* Need to call unlink myself because the noexec variable 91 * has been set to 1. */ 92 if (trace) 93 (void) fprintf (stderr, "%s-> unlink (%s)\n", 94 CLIENT_SERVER_STR, tocvsPath); 95 if ( CVS_UNLINK (tocvsPath) < 0) 96 error (0, errno, "could not remove %s", tocvsPath); 97 } 98 99 free (options); 100 return (ret); 101} 102