cvslatest.c revision 1.10
1 /* $NetBSD: cvslatest.c,v 1.10 2023/02/15 17:00:24 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2016 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifdef __linux__ 33 #define _GNU_SOURCE 34 #endif 35 36 #ifdef HAVE_NBTOOL_CONFIG_H 37 #include "nbtool_config.h" 38 #endif 39 40 #include <sys/cdefs.h> 41 __RCSID("$NetBSD: cvslatest.c,v 1.10 2023/02/15 17:00:24 martin Exp $"); 42 43 /* 44 * Find the latest timestamp in a set of CVS trees, by examining the 45 * Entries files 46 */ 47 48 #include <sys/param.h> 49 #include <sys/types.h> 50 #include <sys/stat.h> 51 52 #include <stdio.h> 53 #include <string.h> 54 #include <stdlib.h> 55 #include <unistd.h> 56 #include <dirent.h> 57 #include <err.h> 58 #include <fts.h> 59 #include <time.h> 60 61 static int debug = 0; 62 static int ignore = 0; 63 64 struct latest { 65 time_t time; 66 char path[MAXPATHLEN]; 67 }; 68 69 static void 70 printlat(const struct latest *lat) 71 { 72 fprintf(stderr, "%s %s", lat->path, ctime(&lat->time)); 73 } 74 75 static void 76 getrepo(const FTSENT *e, char *repo, size_t maxrepo) 77 { 78 FILE *fp; 79 char name[MAXPATHLEN], ename[MAXPATHLEN]; 80 char *ptr; 81 82 snprintf(name, sizeof(name), "%s/Repository", e->fts_accpath); 83 snprintf(ename, sizeof(ename), "%s/Repository", e->fts_path); 84 if ((fp = fopen(name, "r")) == NULL) 85 err(EXIT_FAILURE, "Can't open `%s'", ename); 86 if (fgets(repo, (int)maxrepo, fp) == NULL) 87 err(EXIT_FAILURE, "Can't read `%s'", ename); 88 if ((ptr = strchr(repo, '\n')) == NULL) 89 errx(EXIT_FAILURE, "Malformed line in `%s'", ename); 90 *ptr = '\0'; 91 fclose(fp); 92 } 93 94 static void 95 getlatest(const FTSENT *e, const char *repo, struct latest *lat) 96 { 97 static const char fmt[] = "%a %b %d %H:%M:%S %Y"; 98 char name[MAXPATHLEN], ename[MAXPATHLEN]; 99 char entry[MAXPATHLEN * 2]; 100 char *fn, *dt, *p; 101 time_t t; 102 struct tm tm; 103 struct stat sb; 104 FILE *fp; 105 106 snprintf(name, sizeof(name), "%s/Entries", e->fts_accpath); 107 snprintf(ename, sizeof(ename), "%s/Entries", e->fts_path); 108 if ((fp = fopen(name, "r")) == NULL) 109 err(EXIT_FAILURE, "Can't open `%s'", ename); 110 111 while (fgets(entry, (int)sizeof(entry), fp) != NULL) { 112 if (entry[0] != '/') 113 continue; 114 if ((fn = strtok(entry, "/")) == NULL) 115 goto mal; 116 if (strtok(NULL, "/") == NULL) 117 goto mal; 118 if ((dt = strtok(NULL, "/")) == NULL) 119 goto mal; 120 if (strcmp(dt, "dummy timestamp") == 0) { 121 warnx("Can't get timestamp from uncommitted file %s in `%s'", 122 fn, ename); 123 if (!ignore) 124 exit(EXIT_FAILURE); 125 continue; 126 } 127 /* 128 * This may not be visible in real world, but the cvs code 129 * has paths that would create this string (mabe server 130 * side only?) 131 */ 132 if (strcmp(dt, "dummy timestamp from new-entry") == 0) { 133 warnx("Can't get timestamp from uncommitted file %s in `%s'", 134 fn, ename); 135 if (!ignore) 136 exit(EXIT_FAILURE); 137 continue; 138 } 139 if (strcmp(dt, "Result of merge") == 0) { 140 warnx("Can't get cvs timestamp for localy modified file %s in `%s', using modification time.", 141 fn, ename); 142 if (fstat(fileno(fp), &sb) == 0) { 143 t = sb.st_mtime; 144 goto compare; 145 } 146 if (!ignore) 147 exit(EXIT_FAILURE); 148 continue; 149 } 150 if ((p = strptime(dt, fmt, &tm)) == NULL || *p) { 151 warnx("Malformed time `%s' in `%s'", dt, ename); 152 if (!ignore) 153 exit(EXIT_FAILURE); 154 continue; 155 } 156 tm.tm_isdst = 0; // We are in GMT anyway 157 if ((t = mktime(&tm)) == (time_t)-1) 158 errx(EXIT_FAILURE, "Time conversion `%s' in `%s'", 159 dt, ename); 160 compare: 161 if (lat->time == 0 || lat->time < t) { 162 lat->time = t; 163 snprintf(lat->path, sizeof(lat->path), 164 "%s/%s", repo, fn); 165 if (debug > 1) 166 printlat(lat); 167 } 168 } 169 if (ferror(fp)) 170 err(EXIT_FAILURE, "Can't read `%s'", ename); 171 172 fclose(fp); 173 return; 174 175 mal: 176 errx(EXIT_FAILURE, "Malformed line in `%s'", ename); 177 } 178 179 static void 180 cvsscan(char **pathv, const char *name, struct latest *lat) 181 { 182 FTS *dh; 183 char repo[MAXPATHLEN]; 184 FTSENT *entry; 185 186 lat->time = 0; 187 188 dh = fts_open(pathv, FTS_PHYSICAL, NULL); 189 if (dh == NULL) 190 err(EXIT_FAILURE, "fts_open `%s'", pathv[0]); 191 192 while ((entry = fts_read(dh)) != NULL) { 193 if (entry->fts_info != FTS_D) 194 continue; 195 196 if (strcmp(entry->fts_name, name) != 0) 197 continue; 198 199 getrepo(entry, repo, sizeof(repo)); 200 getlatest(entry, repo, lat); 201 } 202 203 (void)fts_close(dh); 204 } 205 206 static __dead void 207 usage(void) 208 { 209 fprintf(stderr, "Usage: %s [-di] [-n <name>] <path> ...\n", 210 getprogname()); 211 exit(EXIT_FAILURE); 212 } 213 214 static int 215 checkDir(char *path, size_t pathlen, const char *name) 216 { 217 static const char *files[] = { 218 "Entries", "Root", "Repository", 219 }; 220 size_t i; 221 222 for (i = 0; i < __arraycount(files); i++) { 223 snprintf(path, pathlen, "%s/%s", name, files[i]); 224 if (access(path, F_OK) == -1) 225 return 0; 226 } 227 228 return 1; 229 } 230 231 static const char * 232 findCVSDir(char *path, size_t pathlen, const char *name) 233 { 234 DIR *dirp; 235 struct dirent *dp; 236 const char *n; 237 238 if ((dirp = opendir(name)) == NULL) 239 err(EXIT_FAILURE, "Can't open `%s'", name); 240 241 while ((dp = readdir(dirp)) != NULL) { 242 n = dp->d_name; 243 if (n[0] == '.' && (n[1] == '\0' || 244 (n[1] == '.' && n[2] == '\0'))) 245 continue; 246 if (checkDir(path, pathlen, n)) 247 goto out; 248 } 249 n = "CVS"; 250 out: 251 strlcpy(path, n, pathlen); 252 closedir(dirp); 253 return path; 254 } 255 256 257 int 258 main(int argc, char *argv[]) 259 { 260 struct latest lat; 261 const char *name = NULL; 262 char path[MAXPATHLEN]; 263 int c; 264 265 while ((c = getopt(argc, argv, "din:")) != -1) 266 switch (c) { 267 case 'i': 268 ignore++; 269 break; 270 case 'd': 271 debug++; 272 break; 273 case 'n': 274 name = optarg; 275 break; 276 default: 277 usage(); 278 } 279 280 if (argc == optind) 281 usage(); 282 283 // So that mktime behaves consistently 284 setenv("TZ", "UTC", 1); 285 286 if (name == NULL) 287 name = findCVSDir(path, sizeof(path), argv[optind]); 288 289 cvsscan(argv + optind, name, &lat); 290 if (debug) 291 printlat(&lat); 292 printf("%jd\n", (intmax_t)lat.time); 293 return 0; 294 } 295
Indexes created Thu Oct 02 01:09:59 GMT 2025