1 /* $NetBSD: progress.c,v 1.19 2011/09/16 15:39:28 joerg Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by John Hawkinson. 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 #include <sys/cdefs.h> 33 #ifndef lint 34 __RCSID("$NetBSD: progress.c,v 1.19 2011/09/16 15:39:28 joerg Exp $"); 35 #endif /* not lint */ 36 37 #include <sys/types.h> 38 #include <sys/param.h> 39 #include <sys/socket.h> 40 #include <sys/ioctl.h> 41 #include <sys/time.h> 42 #include <sys/wait.h> 43 #include <netinet/in.h> 44 #include <arpa/ftp.h> 45 46 #include <err.h> 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <glob.h> 50 #include <signal.h> 51 #include <inttypes.h> 52 #include <limits.h> 53 #include <netdb.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <termios.h> 58 #include <time.h> 59 #include <tzfile.h> 60 #include <unistd.h> 61 62 #define GLOBAL /* force GLOBAL decls in progressbar.h to be 63 * declared */ 64 #include "progressbar.h" 65 66 static void broken_pipe(int unused); 67 __dead static void usage(void); 68 69 static void 70 broken_pipe(int unused) 71 { 72 signal(SIGPIPE, SIG_DFL); 73 progressmeter(1); 74 kill(getpid(), SIGPIPE); 75 } 76 77 static void 78 usage(void) 79 { 80 fprintf(stderr, 81 "usage: %s [-ez] [-b buffersize] [-f file] [-l length]\n" 82 " %*.s [-p prefix] cmd [args...]\n", 83 getprogname(), (int) strlen(getprogname()), ""); 84 exit(EXIT_FAILURE); 85 } 86 87 88 int 89 main(int argc, char *argv[]) 90 { 91 char *fb_buf; 92 char *infile = NULL; 93 pid_t pid = 0, gzippid = 0, deadpid; 94 int ch, fd, outpipe[2]; 95 int ws, gzipstat, cmdstat; 96 int eflag = 0, lflag = 0, zflag = 0; 97 ssize_t nr, nw, off; 98 size_t buffersize; 99 struct stat statb; 100 struct ttysize ts; 101 102 setprogname(argv[0]); 103 104 /* defaults: Read from stdin, 0 filesize (no completion estimate) */ 105 fd = STDIN_FILENO; 106 filesize = 0; 107 buffersize = 64 * 1024; 108 prefix = NULL; 109 110 while ((ch = getopt(argc, argv, "b:ef:l:p:z")) != -1) 111 switch (ch) { 112 case 'b': 113 buffersize = (size_t) strsuftoll("buffer size", optarg, 114 0, SSIZE_MAX); 115 break; 116 case 'e': 117 eflag++; 118 break; 119 case 'f': 120 infile = optarg; 121 break; 122 case 'l': 123 lflag++; 124 filesize = strsuftoll("input size", optarg, 0, 125 LLONG_MAX); 126 break; 127 case 'p': 128 prefix = optarg; 129 break; 130 case 'z': 131 zflag++; 132 break; 133 case '?': 134 default: 135 usage(); 136 /* NOTREACHED */ 137 } 138 argc -= optind; 139 argv += optind; 140 141 if (argc < 1) 142 usage(); 143 144 if (infile && (fd = open(infile, O_RDONLY, 0)) < 0) 145 err(1, "%s", infile); 146 147 /* stat() to get the filesize unless overridden, or -z */ 148 if (!zflag && !lflag && (fstat(fd, &statb) == 0)) { 149 if (S_ISFIFO(statb.st_mode)) { 150 /* stat(2) on pipe may return only the 151 * first few bytes with more coming. 152 * Don't trust! 153 */ 154 } else { 155 filesize = statb.st_size; 156 } 157 } 158 159 /* gzip -l the file if we have the name and -z is given */ 160 if (zflag && !lflag && infile != NULL) { 161 FILE *gzipsizepipe; 162 char buf[256], *cp, *cmd; 163 164 /* 165 * Read second word of last line of gzip -l output. Looks like: 166 * % gzip -l ../etc.tgz 167 * compressed uncompressed ratio uncompressed_name 168 * 119737 696320 82.8% ../etc.tar 169 */ 170 171 asprintf(&cmd, "gzip -l %s", infile); 172 if ((gzipsizepipe = popen(cmd, "r")) == NULL) 173 err(1, "reading compressed file length"); 174 for (; fgets(buf, 256, gzipsizepipe) != NULL;) 175 continue; 176 strtoimax(buf, &cp, 10); 177 filesize = strtoimax(cp, NULL, 10); 178 if (pclose(gzipsizepipe) < 0) 179 err(1, "closing compressed file length pipe"); 180 free(cmd); 181 } 182 /* Pipe input through gzip -dc if -z is given */ 183 if (zflag) { 184 int gzippipe[2]; 185 186 if (pipe(gzippipe) < 0) 187 err(1, "gzip pipe"); 188 gzippid = fork(); 189 if (gzippid < 0) 190 err(1, "fork for gzip"); 191 192 if (gzippid) { 193 /* parent */ 194 dup2(gzippipe[0], fd); 195 close(gzippipe[0]); 196 close(gzippipe[1]); 197 } else { 198 dup2(gzippipe[1], STDOUT_FILENO); 199 dup2(fd, STDIN_FILENO); 200 close(gzippipe[0]); 201 close(gzippipe[1]); 202 if (execlp("gzip", "gzip", "-dc", NULL)) 203 err(1, "exec()ing gzip"); 204 } 205 } 206 207 /* Initialize progressbar.c's global state */ 208 bytes = 0; 209 progress = 1; 210 ttyout = eflag ? stderr : stdout; 211 212 if (ioctl(fileno(ttyout), TIOCGSIZE, &ts) == -1) 213 ttywidth = 80; 214 else 215 ttywidth = ts.ts_cols; 216 217 fb_buf = malloc(buffersize); 218 if (fb_buf == NULL) 219 err(1, "malloc for buffersize"); 220 221 if (pipe(outpipe) < 0) 222 err(1, "output pipe"); 223 pid = fork(); 224 if (pid < 0) 225 err(1, "fork for output pipe"); 226 227 if (pid == 0) { 228 /* child */ 229 dup2(outpipe[0], STDIN_FILENO); 230 close(outpipe[0]); 231 close(outpipe[1]); 232 execvp(argv[0], argv); 233 err(1, "could not exec %s", argv[0]); 234 } 235 close(outpipe[0]); 236 237 signal(SIGPIPE, broken_pipe); 238 progressmeter(-1); 239 240 while ((nr = read(fd, fb_buf, buffersize)) > 0) 241 for (off = 0; nr; nr -= nw, off += nw, bytes += nw) 242 if ((nw = write(outpipe[1], fb_buf + off, 243 (size_t) nr)) < 0) { 244 progressmeter(1); 245 err(1, "writing %u bytes to output pipe", 246 (unsigned) nr); 247 } 248 close(outpipe[1]); 249 250 gzipstat = 0; 251 cmdstat = 0; 252 while (pid || gzippid) { 253 deadpid = wait(&ws); 254 /* 255 * We need to exit with an error if the command (or gzip) 256 * exited abnormally. 257 * Unfortunately we can't generate a true 'exited by signal' 258 * error without sending the signal to ourselves :-( 259 */ 260 ws = WIFSIGNALED(ws) ? WTERMSIG(ws) : WEXITSTATUS(ws); 261 262 if (deadpid != -1 && errno == EINTR) 263 continue; 264 if (deadpid == pid) { 265 pid = 0; 266 cmdstat = ws; 267 continue; 268 } 269 if (deadpid == gzippid) { 270 gzippid = 0; 271 gzipstat = ws; 272 continue; 273 } 274 break; 275 } 276 277 progressmeter(1); 278 signal(SIGPIPE, SIG_DFL); 279 280 free(fb_buf); 281 282 exit(cmdstat ? cmdstat : gzipstat); 283 } 284