1 /* $NetBSD: cvslatest.c,v 1.4 2016/12/26 14:53:17 christos 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 HAVE_NBTOOL_CONFIG_H 33 #include "nbtool_config.h" 34 #endif 35 36 #include <sys/cdefs.h> 37 __RCSID("$NetBSD: cvslatest.c,v 1.4 2016/12/26 14:53:17 christos Exp $"); 38 39 /* 40 * Find the latest timestamp in a set of CVS trees, by examining the 41 * Entries files 42 */ 43 44 #include <sys/param.h> 45 #include <sys/types.h> 46 47 #include <stdio.h> 48 #include <string.h> 49 #include <stdlib.h> 50 #include <unistd.h> 51 #include <err.h> 52 #include <fts.h> 53 #include <time.h> 54 55 static int debug = 0; 56 static int ignore = 0; 57 58 struct latest { 59 time_t time; 60 char path[MAXPATHLEN]; 61 }; 62 63 static void 64 printlat(const struct latest *lat) 65 { 66 fprintf(stderr, "%s %s", lat->path, ctime(&lat->time)); 67 } 68 69 static void 70 getrepo(const char *path, char *repo, size_t maxrepo) 71 { 72 FILE *fp; 73 char name[MAXPATHLEN]; 74 char *ptr; 75 76 snprintf(name, sizeof(name), "%s/Repository", path); 77 if ((fp = fopen(name, "r")) == NULL) 78 err(EXIT_FAILURE, "Can't open `%s'", name); 79 if (fgets(repo, (int)maxrepo, fp) == NULL) 80 err(EXIT_FAILURE, "Can't read `%s'", name); 81 if ((ptr = strchr(repo, '\n')) == NULL) 82 errx(EXIT_FAILURE, "Malformed line in `%s'", name); 83 *ptr = '\0'; 84 fclose(fp); 85 } 86 87 static void 88 getlatest(const char *path, const char *repo, struct latest *lat) 89 { 90 static const char fmt[] = "%a %b %d %H:%M:%S %Y"; 91 char name[MAXPATHLEN]; 92 char entry[MAXPATHLEN * 2]; 93 char *fn, *dt, *p; 94 time_t t; 95 struct tm tm; 96 FILE *fp; 97 98 snprintf(name, sizeof(name), "%s/Entries", path); 99 if ((fp = fopen(name, "r")) == NULL) 100 err(EXIT_FAILURE, "Can't open `%s'", name); 101 102 while (fgets(entry, (int)sizeof(entry), fp) != NULL) { 103 if (entry[0] != '/') 104 continue; 105 if ((fn = strtok(entry, "/")) == NULL) 106 goto mal; 107 if (strtok(NULL, "/") == NULL) 108 goto mal; 109 if ((dt = strtok(NULL, "/")) == NULL) 110 goto mal; 111 if ((p = strptime(dt, fmt, &tm)) == NULL || *p) { 112 warnx("Malformed time `%s' in `%s'", dt, name); 113 if (!ignore) 114 exit(EXIT_FAILURE); 115 } 116 tm.tm_isdst = 0; // We are in GMT anyway 117 if ((t = mktime(&tm)) == (time_t)-1) 118 errx(EXIT_FAILURE, "Time conversion `%s' in `%s'", 119 dt, name); 120 if (lat->time == 0 || lat->time < t) { 121 lat->time = t; 122 snprintf(lat->path, sizeof(lat->path), 123 "%s/%s", repo, fn); 124 if (debug > 1) 125 printlat(lat); 126 } 127 } 128 129 fclose(fp); 130 return; 131 132 mal: 133 errx(EXIT_FAILURE, "Malformed line in `%s'", name); 134 } 135 136 static void 137 cvsscan(char **pathv, const char *name, struct latest *lat) 138 { 139 FTS *dh; 140 char repo[MAXPATHLEN]; 141 FTSENT *entry; 142 143 lat->time = 0; 144 145 dh = fts_open(pathv, FTS_PHYSICAL, NULL); 146 if (dh == NULL) 147 err(EXIT_FAILURE, "fts_open `%s'", pathv[0]); 148 149 while ((entry = fts_read(dh)) != NULL) { 150 if (entry->fts_info != FTS_D) 151 continue; 152 153 if (strcmp(entry->fts_name, name) != 0) 154 continue; 155 156 getrepo(entry->fts_accpath, repo, sizeof(repo)); 157 getlatest(entry->fts_accpath, repo, lat); 158 } 159 160 (void)fts_close(dh); 161 } 162 163 static __dead void 164 usage(void) 165 { 166 fprintf(stderr, "Usage: %s [-di] [-n <name>] <path> ...\n", 167 getprogname()); 168 exit(EXIT_FAILURE); 169 } 170 171 int 172 main(int argc, char *argv[]) 173 { 174 struct latest lat; 175 const char *name = "CVS"; 176 int c; 177 178 while ((c = getopt(argc, argv, "din:")) != -1) 179 switch (c) { 180 case 'i': 181 ignore++; 182 break; 183 case 'd': 184 debug++; 185 break; 186 case 'n': 187 name = optarg; 188 break; 189 default: 190 usage(); 191 } 192 193 if (argc == optind) 194 usage(); 195 196 // So that mktime behaves consistently 197 setenv("TZ", "UTC", 1); 198 199 cvsscan(argv + optind, name, &lat); 200 if (debug) 201 printlat(&lat); 202 printf("%jd\n", (intmax_t)lat.time); 203 return 0; 204 } 205