1 /* $NetBSD: cvslatest.c,v 1.6 2017/09/24 09:43:27 joerg 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 1.6 2017/09/24 09:43:27 joerg 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 51 #include <stdio.h> 52 #include <string.h> 53 #include <stdlib.h> 54 #include <unistd.h> 55 #include <err.h> 56 #include <fts.h> 57 #include <time.h> 58 59 static int debug = 0; 60 static int ignore = 0; 61 62 struct latest { 63 time_t time; 64 char path[MAXPATHLEN]; 65 }; 66 67 static void 68 printlat(const struct latest *lat) 69 { 70 fprintf(stderr, "%s %s", lat->path, ctime(&lat->time)); 71 } 72 73 static void 74 getrepo(const FTSENT *e, char *repo, size_t maxrepo) 75 { 76 FILE *fp; 77 char name[MAXPATHLEN], ename[MAXPATHLEN]; 78 char *ptr; 79 80 snprintf(name, sizeof(name), "%s/Repository", e->fts_accpath); 81 snprintf(ename, sizeof(ename), "%s/Repository", e->fts_path); 82 if ((fp = fopen(name, "r")) == NULL) 83 err(EXIT_FAILURE, "Can't open `%s'", ename); 84 if (fgets(repo, (int)maxrepo, fp) == NULL) 85 err(EXIT_FAILURE, "Can't read `%s'", ename); 86 if ((ptr = strchr(repo, '\n')) == NULL) 87 errx(EXIT_FAILURE, "Malformed line in `%s'", ename); 88 *ptr = '\0'; 89 fclose(fp); 90 } 91 92 static void 93 getlatest(const FTSENT *e, const char *repo, struct latest *lat) 94 { 95 static const char fmt[] = "%a %b %d %H:%M:%S %Y"; 96 char name[MAXPATHLEN], ename[MAXPATHLEN]; 97 char entry[MAXPATHLEN * 2]; 98 char *fn, *dt, *p; 99 time_t t; 100 struct tm tm; 101 FILE *fp; 102 103 snprintf(name, sizeof(name), "%s/Entries", e->fts_accpath); 104 snprintf(ename, sizeof(ename), "%s/Entries", e->fts_path); 105 if ((fp = fopen(name, "r")) == NULL) 106 err(EXIT_FAILURE, "Can't open `%s'", ename); 107 108 while (fgets(entry, (int)sizeof(entry), fp) != NULL) { 109 if (entry[0] != '/') 110 continue; 111 if ((fn = strtok(entry, "/")) == NULL) 112 goto mal; 113 if (strtok(NULL, "/") == NULL) 114 goto mal; 115 if ((dt = strtok(NULL, "/")) == NULL) 116 goto mal; 117 if ((p = strptime(dt, fmt, &tm)) == NULL || *p) { 118 warnx("Malformed time `%s' in `%s'", dt, ename); 119 if (!ignore) 120 exit(EXIT_FAILURE); 121 } 122 tm.tm_isdst = 0; // We are in GMT anyway 123 if ((t = mktime(&tm)) == (time_t)-1) 124 errx(EXIT_FAILURE, "Time conversion `%s' in `%s'", 125 dt, ename); 126 if (lat->time == 0 || lat->time < t) { 127 lat->time = t; 128 snprintf(lat->path, sizeof(lat->path), 129 "%s/%s", repo, fn); 130 if (debug > 1) 131 printlat(lat); 132 } 133 } 134 135 fclose(fp); 136 return; 137 138 mal: 139 errx(EXIT_FAILURE, "Malformed line in `%s'", ename); 140 } 141 142 static void 143 cvsscan(char **pathv, const char *name, struct latest *lat) 144 { 145 FTS *dh; 146 char repo[MAXPATHLEN]; 147 FTSENT *entry; 148 149 lat->time = 0; 150 151 dh = fts_open(pathv, FTS_PHYSICAL, NULL); 152 if (dh == NULL) 153 err(EXIT_FAILURE, "fts_open `%s'", pathv[0]); 154 155 while ((entry = fts_read(dh)) != NULL) { 156 if (entry->fts_info != FTS_D) 157 continue; 158 159 if (strcmp(entry->fts_name, name) != 0) 160 continue; 161 162 getrepo(entry, repo, sizeof(repo)); 163 getlatest(entry, repo, lat); 164 } 165 166 (void)fts_close(dh); 167 } 168 169 static __dead void 170 usage(void) 171 { 172 fprintf(stderr, "Usage: %s [-di] [-n <name>] <path> ...\n", 173 getprogname()); 174 exit(EXIT_FAILURE); 175 } 176 177 int 178 main(int argc, char *argv[]) 179 { 180 struct latest lat; 181 const char *name = "CVS"; 182 int c; 183 184 while ((c = getopt(argc, argv, "din:")) != -1) 185 switch (c) { 186 case 'i': 187 ignore++; 188 break; 189 case 'd': 190 debug++; 191 break; 192 case 'n': 193 name = optarg; 194 break; 195 default: 196 usage(); 197 } 198 199 if (argc == optind) 200 usage(); 201 202 // So that mktime behaves consistently 203 setenv("TZ", "UTC", 1); 204 205 cvsscan(argv + optind, name, &lat); 206 if (debug) 207 printlat(&lat); 208 printf("%jd\n", (intmax_t)lat.time); 209 return 0; 210 } 211