1 /* $NetBSD: cvslatest.c,v 1.5 2017/01/12 14:27:14 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 1.5 2017/01/12 14:27:14 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 FTSENT *e, char *repo, size_t maxrepo) 71 { 72 FILE *fp; 73 char name[MAXPATHLEN], ename[MAXPATHLEN]; 74 char *ptr; 75 76 snprintf(name, sizeof(name), "%s/Repository", e->fts_accpath); 77 snprintf(ename, sizeof(ename), "%s/Repository", e->fts_path); 78 if ((fp = fopen(name, "r")) == NULL) 79 err(EXIT_FAILURE, "Can't open `%s'", ename); 80 if (fgets(repo, (int)maxrepo, fp) == NULL) 81 err(EXIT_FAILURE, "Can't read `%s'", ename); 82 if ((ptr = strchr(repo, '\n')) == NULL) 83 errx(EXIT_FAILURE, "Malformed line in `%s'", ename); 84 *ptr = '\0'; 85 fclose(fp); 86 } 87 88 static void 89 getlatest(const FTSENT *e, const char *repo, struct latest *lat) 90 { 91 static const char fmt[] = "%a %b %d %H:%M:%S %Y"; 92 char name[MAXPATHLEN], ename[MAXPATHLEN]; 93 char entry[MAXPATHLEN * 2]; 94 char *fn, *dt, *p; 95 time_t t; 96 struct tm tm; 97 FILE *fp; 98 99 snprintf(name, sizeof(name), "%s/Entries", e->fts_accpath); 100 snprintf(ename, sizeof(ename), "%s/Entries", e->fts_path); 101 if ((fp = fopen(name, "r")) == NULL) 102 err(EXIT_FAILURE, "Can't open `%s'", ename); 103 104 while (fgets(entry, (int)sizeof(entry), fp) != NULL) { 105 if (entry[0] != '/') 106 continue; 107 if ((fn = strtok(entry, "/")) == NULL) 108 goto mal; 109 if (strtok(NULL, "/") == NULL) 110 goto mal; 111 if ((dt = strtok(NULL, "/")) == NULL) 112 goto mal; 113 if ((p = strptime(dt, fmt, &tm)) == NULL || *p) { 114 warnx("Malformed time `%s' in `%s'", dt, ename); 115 if (!ignore) 116 exit(EXIT_FAILURE); 117 } 118 tm.tm_isdst = 0; // We are in GMT anyway 119 if ((t = mktime(&tm)) == (time_t)-1) 120 errx(EXIT_FAILURE, "Time conversion `%s' in `%s'", 121 dt, ename); 122 if (lat->time == 0 || lat->time < t) { 123 lat->time = t; 124 snprintf(lat->path, sizeof(lat->path), 125 "%s/%s", repo, fn); 126 if (debug > 1) 127 printlat(lat); 128 } 129 } 130 131 fclose(fp); 132 return; 133 134 mal: 135 errx(EXIT_FAILURE, "Malformed line in `%s'", ename); 136 } 137 138 static void 139 cvsscan(char **pathv, const char *name, struct latest *lat) 140 { 141 FTS *dh; 142 char repo[MAXPATHLEN]; 143 FTSENT *entry; 144 145 lat->time = 0; 146 147 dh = fts_open(pathv, FTS_PHYSICAL, NULL); 148 if (dh == NULL) 149 err(EXIT_FAILURE, "fts_open `%s'", pathv[0]); 150 151 while ((entry = fts_read(dh)) != NULL) { 152 if (entry->fts_info != FTS_D) 153 continue; 154 155 if (strcmp(entry->fts_name, name) != 0) 156 continue; 157 158 getrepo(entry, repo, sizeof(repo)); 159 getlatest(entry, repo, lat); 160 } 161 162 (void)fts_close(dh); 163 } 164 165 static __dead void 166 usage(void) 167 { 168 fprintf(stderr, "Usage: %s [-di] [-n <name>] <path> ...\n", 169 getprogname()); 170 exit(EXIT_FAILURE); 171 } 172 173 int 174 main(int argc, char *argv[]) 175 { 176 struct latest lat; 177 const char *name = "CVS"; 178 int c; 179 180 while ((c = getopt(argc, argv, "din:")) != -1) 181 switch (c) { 182 case 'i': 183 ignore++; 184 break; 185 case 'd': 186 debug++; 187 break; 188 case 'n': 189 name = optarg; 190 break; 191 default: 192 usage(); 193 } 194 195 if (argc == optind) 196 usage(); 197 198 // So that mktime behaves consistently 199 setenv("TZ", "UTC", 1); 200 201 cvsscan(argv + optind, name, &lat); 202 if (debug) 203 printlat(&lat); 204 printf("%jd\n", (intmax_t)lat.time); 205 return 0; 206 } 207