1 /* $NetBSD: progress.c,v 1.18 2010/07/17 10:51:03 tron 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 1.18 2010/07/17 10:51:03 tron 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 static void usage(void); 68 int main(int, char *[]); 69 70 static void 71 broken_pipe(int unused) 72 { 73 signal(SIGPIPE, SIG_DFL); 74 progressmeter(1); 75 kill(getpid(), SIGPIPE); 76 } 77 78 static void 79 usage(void) 80 { 81 fprintf(stderr, 82 "usage: %s [-ez] [-b buffersize] [-f file] [-l length]\n" 83 " %*.s [-p prefix] cmd [args...]\n", 84 getprogname(), (int) strlen(getprogname()), ""); 85 exit(EXIT_FAILURE); 86 } 87 88 89 int 90 main(int argc, char *argv[]) 91 { 92 char *fb_buf; 93 char *infile = NULL; 94 pid_t pid = 0, gzippid = 0, deadpid; 95 int ch, fd, outpipe[2]; 96 int ws, gzipstat, cmdstat; 97 int eflag = 0, lflag = 0, zflag = 0; 98 ssize_t nr, nw, off; 99 size_t buffersize; 100 struct stat statb; 101 struct ttysize ts; 102 103 setprogname(argv[0]); 104 105 /* defaults: Read from stdin, 0 filesize (no completion estimate) */ 106 fd = STDIN_FILENO; 107 filesize = 0; 108 buffersize = 64 * 1024; 109 prefix = NULL; 110 111 while ((ch = getopt(argc, argv, "b:ef:l:p:z")) != -1) 112 switch (ch) { 113 case 'b': 114 buffersize = (size_t) strsuftoll("buffer size", optarg, 115 0, SSIZE_MAX); 116 break; 117 case 'e': 118 eflag++; 119 break; 120 case 'f': 121 infile = optarg; 122 break; 123 case 'l': 124 lflag++; 125 filesize = strsuftoll("input size", optarg, 0, 126 LLONG_MAX); 127 break; 128 case 'p': 129 prefix = optarg; 130 break; 131 case 'z': 132 zflag++; 133 break; 134 case '?': 135 default: 136 usage(); 137 /* NOTREACHED */ 138 } 139 argc -= optind; 140 argv += optind; 141 142 if (argc < 1) 143 usage(); 144 145 if (infile && (fd = open(infile, O_RDONLY, 0)) < 0) 146 err(1, "%s", infile); 147 148 /* stat() to get the filesize unless overridden, or -z */ 149 if (!zflag && !lflag && (fstat(fd, &statb) == 0)) { 150 if (S_ISFIFO(statb.st_mode)) { 151 /* stat(2) on pipe may return only the 152 * first few bytes with more coming. 153 * Don't trust! 154 */ 155 } else { 156 filesize = statb.st_size; 157 } 158 } 159 160 /* gzip -l the file if we have the name and -z is given */ 161 if (zflag && !lflag && infile != NULL) { 162 FILE *gzipsizepipe; 163 char buf[256], *cp, *cmd; 164 165 /* 166 * Read second word of last line of gzip -l output. Looks like: 167 * % gzip -l ../etc.tgz 168 * compressed uncompressed ratio uncompressed_name 169 * 119737 696320 82.8% ../etc.tar 170 */ 171 172 asprintf(&cmd, "gzip -l %s", infile); 173 if ((gzipsizepipe = popen(cmd, "r")) == NULL) 174 err(1, "reading compressed file length"); 175 for (; fgets(buf, 256, gzipsizepipe) != NULL;) 176 continue; 177 strtoimax(buf, &cp, 10); 178 filesize = strtoimax(cp, NULL, 10); 179 if (pclose(gzipsizepipe) < 0) 180 err(1, "closing compressed file length pipe"); 181 free(cmd); 182 } 183 /* Pipe input through gzip -dc if -z is given */ 184 if (zflag) { 185 int gzippipe[2]; 186 187 if (pipe(gzippipe) < 0) 188 err(1, "gzip pipe"); 189 gzippid = fork(); 190 if (gzippid < 0) 191 err(1, "fork for gzip"); 192 193 if (gzippid) { 194 /* parent */ 195 dup2(gzippipe[0], fd); 196 close(gzippipe[0]); 197 close(gzippipe[1]); 198 } else { 199 dup2(gzippipe[1], STDOUT_FILENO); 200 dup2(fd, STDIN_FILENO); 201 close(gzippipe[0]); 202 close(gzippipe[1]); 203 if (execlp("gzip", "gzip", "-dc", NULL)) 204 err(1, "exec()ing gzip"); 205 } 206 } 207 208 /* Initialize progressbar.c's global state */ 209 bytes = 0; 210 progress = 1; 211 ttyout = eflag ? stderr : stdout; 212 213 if (ioctl(fileno(ttyout), TIOCGSIZE, &ts) == -1) 214 ttywidth = 80; 215 else 216 ttywidth = ts.ts_cols; 217 218 fb_buf = malloc(buffersize); 219 if (fb_buf == NULL) 220 err(1, "malloc for buffersize"); 221 222 if (pipe(outpipe) < 0) 223 err(1, "output pipe"); 224 pid = fork(); 225 if (pid < 0) 226 err(1, "fork for output pipe"); 227 228 if (pid == 0) { 229 /* child */ 230 dup2(outpipe[0], STDIN_FILENO); 231 close(outpipe[0]); 232 close(outpipe[1]); 233 execvp(argv[0], argv); 234 err(1, "could not exec %s", argv[0]); 235 } 236 close(outpipe[0]); 237 238 signal(SIGPIPE, broken_pipe); 239 progressmeter(-1); 240 241 while ((nr = read(fd, fb_buf, buffersize)) > 0) 242 for (off = 0; nr; nr -= nw, off += nw, bytes += nw) 243 if ((nw = write(outpipe[1], fb_buf + off, 244 (size_t) nr)) < 0) { 245 progressmeter(1); 246 err(1, "writing %u bytes to output pipe", 247 (unsigned) nr); 248 } 249 close(outpipe[1]); 250 251 gzipstat = 0; 252 cmdstat = 0; 253 while (pid || gzippid) { 254 deadpid = wait(&ws); 255 /* 256 * We need to exit with an error if the command (or gzip) 257 * exited abnormally. 258 * Unfortunately we can't generate a true 'exited by signal' 259 * error without sending the signal to ourselves :-( 260 */ 261 ws = WIFSIGNALED(ws) ? WTERMSIG(ws) : WEXITSTATUS(ws); 262 263 if (deadpid != -1 && errno == EINTR) 264 continue; 265 if (deadpid == pid) { 266 pid = 0; 267 cmdstat = ws; 268 continue; 269 } 270 if (deadpid == gzippid) { 271 gzippid = 0; 272 gzipstat = ws; 273 continue; 274 } 275 break; 276 } 277 278 progressmeter(1); 279 signal(SIGPIPE, SIG_DFL); 280 281 free(fb_buf); 282 283 exit(cmdstat ? cmdstat : gzipstat); 284 } 285