progress.c revision 1.10
1/* $NetBSD: progress.c,v 1.10 2005/02/23 22:32:31 dsl 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 * 3. Neither the name of The NetBSD Foundation nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35#include <sys/cdefs.h> 36#ifndef lint 37__RCSID("$NetBSD: progress.c,v 1.10 2005/02/23 22:32:31 dsl Exp $"); 38#endif /* not lint */ 39 40#include <sys/types.h> 41#include <sys/param.h> 42#include <sys/socket.h> 43#include <sys/ioctl.h> 44#include <sys/time.h> 45#include <sys/wait.h> 46#include <netinet/in.h> 47#include <arpa/ftp.h> 48 49#include <ctype.h> 50#include <err.h> 51#include <errno.h> 52#include <fcntl.h> 53#include <glob.h> 54#include <signal.h> 55#include <limits.h> 56#include <netdb.h> 57#include <stdio.h> 58#include <stdlib.h> 59#include <string.h> 60#include <termios.h> 61#include <time.h> 62#include <tzfile.h> 63#include <unistd.h> 64 65#define GLOBAL /* force GLOBAL decls in progressbar.h to be 66 * declared */ 67#include "progressbar.h" 68 69static void usage(void); 70int main(int, char *[]); 71 72static void 73usage(void) 74{ 75 fprintf(stderr, 76 "usage: %s [-z] [-f file] [-l length] [-p prefix] cmd [args...]\n", 77 getprogname()); 78 exit(1); 79} 80 81 82int 83main(int argc, char *argv[]) 84{ 85 static char fb_buf[BUFSIZ]; 86 char *infile = NULL; 87 pid_t pid = 0, gzippid = 0, deadpid; 88 int ch, fd, outpipe[2]; 89 int ws, gzipstat, cmdstat; 90 int lflag = 0, zflag = 0; 91 ssize_t nr, nw, off; 92 struct stat statb; 93 struct ttysize ts; 94 95 setprogname(argv[0]); 96 97 /* defaults: Read from stdin, 0 filesize (no completion estimate) */ 98 fd = STDIN_FILENO; 99 filesize = 0; 100 prefix=NULL; 101 102 while ((ch = getopt(argc, argv, "f:l:p:z")) != -1) 103 switch (ch) { 104 case 'f': 105 infile = optarg; 106 break; 107 case 'l': 108 lflag++; 109 filesize = strsuftoll("input size", optarg, 0, 110 LLONG_MAX); 111 break; 112 case 'p': 113 prefix = optarg; 114 break; 115 case 'z': 116 zflag++; 117 break; 118 default: 119 case '?': 120 usage(); 121 /* NOTREACHED */ 122 } 123 argc -= optind; 124 argv += optind; 125 126 if (argc < 1) 127 usage(); 128 if (infile && (fd = open(infile, O_RDONLY, 0)) < 0) 129 err(1, "%s", infile); 130 131 /* stat() to get the filesize unless overridden, or -z */ 132 if (!zflag && !lflag && (fstat(fd, &statb) == 0)) 133 filesize = statb.st_size; 134 135 /* gzip -l the file if we have the name and -z is given */ 136 if (zflag && !lflag && infile != NULL) { 137 FILE *gzipsizepipe; 138 char buf[256], *cp, *cmd; 139 140 /* 141 * Read second word of last line of gzip -l output. Looks like: 142 * % gzip -l ../etc.tgz 143 * compressed uncompressed ratio uncompressed_name 144 * 119737 696320 82.8% ../etc.tar 145 */ 146 147 asprintf(&cmd, "gzip -l %s", infile); 148 if ((gzipsizepipe = popen(cmd, "r")) == NULL) 149 err(1, "reading compressed file length"); 150 for (; fgets(buf, 256, gzipsizepipe) != NULL;) 151 continue; 152 strtoimax(buf, &cp, 10); 153 filesize = strtoimax(cp, NULL, 10); 154 if (pclose(gzipsizepipe) < 0) 155 err(1, "closing compressed file length pipe"); 156 free(cmd); 157 } 158 /* Pipe input through gzip -dc if -z is given */ 159 if (zflag) { 160 int gzippipe[2]; 161 162 if (pipe(gzippipe) < 0) 163 err(1, "gzip pipe"); 164 gzippid = fork(); 165 if (gzippid < 0) 166 err(1, "fork for gzip"); 167 168 if (gzippid) { 169 /* parent */ 170 dup2(gzippipe[0], fd); 171 close(gzippipe[0]); 172 close(gzippipe[1]); 173 } else { 174 dup2(gzippipe[1], STDOUT_FILENO); 175 dup2(fd, STDIN_FILENO); 176 close(gzippipe[0]); 177 close(gzippipe[1]); 178 if (execlp("gzip", "gzip", "-dc", NULL)) 179 err(1, "exec()ing gzip"); 180 } 181 } 182 183 /* Initialize progressbar.c's global state */ 184 bytes = 0; 185 progress = 1; 186 ttyout = stdout; 187 188 if (ioctl(fileno(ttyout), TIOCGSIZE, &ts) == -1) { 189 ttywidth = 80; 190 } else 191 ttywidth = ts.ts_cols; 192 193 if (pipe(outpipe) < 0) 194 err(1, "output pipe"); 195 pid = fork(); 196 if (pid < 0) 197 err(1, "fork for output pipe"); 198 199 if (pid == 0) { 200 /* child */ 201 dup2(outpipe[0], STDIN_FILENO); 202 close(outpipe[0]); 203 close(outpipe[1]); 204 execvp(argv[0], argv); 205 err(1, "could not exec %s", argv[0]); 206 } 207 close(outpipe[0]); 208 209 progressmeter(-1); 210 while ((nr = read(fd, fb_buf, BUFSIZ)) > 0) 211 for (off = 0; nr; nr -= nw, off += nw, bytes += nw) 212 if ((nw = write(outpipe[1], fb_buf + off, 213 (size_t) nr)) < 0) 214 err(1, "writing %u bytes to output pipe", 215 (unsigned) nr); 216 close(outpipe[1]); 217 218 gzipstat = 0; 219 cmdstat = 0; 220 while (pid || gzippid) { 221 deadpid = wait(&ws); 222 /* 223 * We need to exit with an error if the command (or gzip) 224 * exited abnormally. 225 * Unfortunately we can't generate a true 'exited by signal' 226 * error without sending the signal to ourselves :-( 227 */ 228 ws = WIFSIGNALED(ws) ? WTERMSIG(ws) : WEXITSTATUS(ws); 229 230 if (deadpid != -1 && errno == EINTR) 231 continue; 232 if (deadpid == pid) { 233 pid = 0; 234 cmdstat = ws; 235 continue; 236 } 237 if (deadpid == gzippid) { 238 gzippid = 0; 239 gzipstat = ws; 240 continue; 241 } 242 break; 243 } 244 245 progressmeter(1); 246 exit(cmdstat ? cmdstat : gzipstat); 247} 248