progress.c

   1 /*      $NetBSD: progress.c,v 1.7 2003/02/12 00:58:34 ross 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 1.7 2003/02/12 00:58:34 ross 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
  69 static void usage(void);
  70 int main(int, char *[]);
  71
  72 static void
  73 usage(void)
  74 {
  75         fprintf(stderr,
  76             "usage: %s [-z] [-f file] [-l length] cmd [args...]\n",
  77             getprogname());
  78         exit(1);
  79 }
  80
  81
  82 int
  83 main(int argc, char *argv[])
  84 {
  85         static char fb_buf[BUFSIZ];
  86         char *infile = NULL;
  87         pid_t pid = 0, gzippid = 0;
  88         int ch, fd, outpipe[2], waitstat;
  89         int lflag = 0, zflag = 0;
  90         ssize_t nr, nw, off;
  91         struct stat statb;
  92         struct ttysize ts;
  93
  94         setprogname(argv[0]);
  95
  96         /* defaults: Read from stdin, 0 filesize (no completion estimate) */
  97         fd = STDIN_FILENO;
  98         filesize = 0;
  99
 100         while ((ch = getopt(argc, argv, "f:l:z")) != -1)
 101                 switch (ch) {
 102                 case 'f':
 103                         infile = optarg;
 104                         break;
 105                 case 'l':
 106                         lflag++;
 107                         filesize = strtoull(optarg, NULL, 0);
 108                         break;
 109                 case 'z':
 110                         zflag++;
 111                         break;
 112                 default:
 113                 case '?':
 114                         usage();
 115                         /* NOTREACHED */
 116                 }
 117         argc -= optind;
 118         argv += optind;
 119
 120         if (argc < 1)
 121                 usage();
 122         if (infile && (fd = open(infile, O_RDONLY, 0)) < 0)
 123                 err(1, "%s", infile);
 124
 125         /* stat() to get the filesize unless overridden, or -z */
 126         if (!zflag && !lflag && (fstat(fd, &statb) == 0))
 127                 filesize = statb.st_size;
 128
 129         /* gzip -l the file if we have the name and -z is given */
 130         if (zflag && !lflag && infile != NULL) {
 131                 FILE *gzipsizepipe;
 132                 char buf[256], *cmd;
 133                 long size;
 134
 135                 /*
 136                  * Read second word of last line of gzip -l output. Looks like:
 137                  * % gzip -l ../etc.tgz
 138                  *   compressed uncompressed  ratio uncompressed_name
 139                  *       119737       696320  82.8% ../etc.tar
 140                  */
 141
 142                 asprintf(&cmd, "gzip -l %s", infile);
 143                 if ((gzipsizepipe = popen(cmd, "r")) == NULL)
 144                         err(1, "reading compressed file length");
 145                 for (; fgets(buf, 256, gzipsizepipe) != NULL;)
 146                     continue;
 147                 sscanf(buf, "%*d %ld", &size);
 148                 filesize = size;
 149                 if (pclose(gzipsizepipe) < 0)
 150                         err(1, "closing compressed file length pipe");
 151                 free(cmd);
 152         }
 153         /* Pipe input through gzip -dc if -z is given */
 154         if (zflag) {
 155                 int gzippipe[2];
 156
 157                 if (pipe(gzippipe) < 0)
 158                         err(1, "gzip pipe");
 159                 gzippid = fork();
 160                 if (gzippid < 0)
 161                         err(1, "fork for gzip");
 162
 163                 if (gzippid) {
 164                         /* parent */
 165                         dup2(gzippipe[0], fd);
 166                         close(gzippipe[0]);
 167                         close(gzippipe[1]);
 168                 } else {
 169                         dup2(gzippipe[1], STDOUT_FILENO);
 170                         dup2(fd, STDIN_FILENO);
 171                         close(gzippipe[0]);
 172                         close(gzippipe[1]);
 173                         if (execlp("gzip", "gzip", "-dc", NULL))
 174                                 err(1, "exec()ing gzip");
 175                 }
 176         }
 177
 178         /* Initialize progressbar.c's global state */
 179         bytes = 0;
 180         progress = 1;
 181         ttyout = stdout;
 182
 183         if (ioctl(fileno(ttyout), TIOCGSIZE, &ts) == -1) {
 184                 ttywidth = 80;
 185         } else
 186                 ttywidth = ts.ts_cols;
 187
 188         if (pipe(outpipe) < 0)
 189                 err(1, "output pipe");
 190         pid = fork();
 191         if (pid < 0)
 192                 err(1, "fork for output pipe");
 193
 194         if (pid == 0) {
 195                 /* child */
 196                 dup2(outpipe[0], STDIN_FILENO);
 197                 close(outpipe[0]);
 198                 close(outpipe[1]);
 199                 execvp(argv[0], argv);
 200                 err(1, "could not exec %s", argv[0]);
 201         }
 202         close(outpipe[0]);
 203
 204         progressmeter(-1);
 205         while ((nr = read(fd, fb_buf, BUFSIZ)) > 0)
 206                 for (off = 0; nr; nr -= nw, off += nw, bytes += nw)
 207                         if ((nw = write(outpipe[1], fb_buf + off,
 208                             (size_t) nr)) < 0)
 209                                 err(1, "writing %u bytes to output pipe",
 210                                                         (unsigned) nr);
 211         close(outpipe[1]);
 212
 213         while (pid || gzippid) {
 214                 int deadpid;
 215
 216                 deadpid = wait(&waitstat);
 217
 218                 if (deadpid == pid)
 219                         pid = 0;
 220                 else if (deadpid == gzippid)
 221                         gzippid = 0;
 222                 else if (deadpid != -1)
 223                         continue;
 224                 else if (errno == EINTR)
 225                         continue;
 226                 else break;
 227         }
 228
 229         progressmeter(1);
 230         return 0;
 231 }