progress.c

   1 /*      $NetBSD: progress.c,v 1.1 2003/01/22 00:14:12 jhawk 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 1.1 2003/01/22 00:14:12 jhawk 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;
  88         int ch, fd, outpipe[2], waitstat;
  89         int lflag = 0, zflag = 0;
  90         ssize_t nr, nw, off;
  91         struct stat statb;
  92
  93         setprogname(argv[0]);
  94
  95         /* defaults: Read from stdin, 0 filesize (no completion estimate) */
  96         fd = STDIN_FILENO;
  97         filesize = 0;
  98
  99         while ((ch = getopt(argc, argv, "f:l:z")) != -1)
 100                 switch (ch) {
 101                 case 'f':
 102                         infile = optarg;
 103                         break;
 104                 case 'l':
 105                         lflag++;
 106                         filesize = strtoull(optarg, NULL, 0);
 107                         break;
 108                 case 'z':
 109                         zflag++;
 110                         break;
 111                 default:
 112                 case '?':
 113                         usage();
 114                         /* NOTREACHED */
 115                 }
 116         argc -= optind;
 117         argv += optind;
 118
 119         if (argc < 1)
 120                 usage();
 121         if (infile && (fd = open(infile, O_RDONLY, 0)) < 0)
 122                 err(1, "%s", infile);
 123
 124         /* stat() to get the filesize unless overridden, or -z */
 125         if (!zflag && !lflag && (fstat(fd, &statb) == 0))
 126                 filesize = statb.st_size;
 127
 128         /* gzip -l the file if we have the name and -z is given */
 129         if (zflag && !lflag && infile != NULL) {
 130                 FILE *gzipsizepipe;
 131                 char buf[256], *cmd;
 132                 long size;
 133
 134                 /*
 135                  * Read second word of last line of gzip -l output. Looks like:
 136                  * % gzip -l ../etc.tgz
 137                  *   compressed uncompressed  ratio uncompressed_name
 138                  *       119737       696320  82.8% ../etc.tar
 139                  */
 140
 141                 asprintf(&cmd, "gzip -l %s", infile);
 142                 if ((gzipsizepipe = popen(cmd, "r")) == NULL)
 143                         err(1, "reading compressed file length");
 144                 for (; fgets(buf, 256, gzipsizepipe) != NULL;)
 145                     continue;
 146                 sscanf(buf, "%*d %ld", &size);
 147                 filesize = size;
 148                 if (pclose(gzipsizepipe) < 0)
 149                         err(1, "closing compressed file length pipe");
 150                 free(cmd);
 151         }
 152         /* Pipe input through gzip -dc if -z is given */
 153         if (zflag) {
 154                 pid_t gzippid;
 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         ttywidth = 80;
 183
 184         if (pipe(outpipe) < 0)
 185                 err(1, "output pipe");
 186         pid = fork();
 187         if (pid < 0)
 188                 err(1, "fork for output pipe");
 189
 190         if (pid == 0) {
 191                 /* child */
 192                 dup2(outpipe[0], STDIN_FILENO);
 193                 close(outpipe[0]);
 194                 close(outpipe[1]);
 195                 execvp(argv[0], argv);
 196                 err(1, "could not exec %s", argv[0]);
 197         }
 198         close(outpipe[0]);
 199
 200         progressmeter(-1);
 201         while ((nr = read(fd, fb_buf, BUFSIZ)) > 0)
 202             for (off = 0; nr; nr -= nw, off += nw, bytes += nw)
 203                 if ((nw = write(outpipe[1], &fb_buf + off, (size_t) nr)) < 0)
 204                     err(1, "writing %d bytes to output pipe", nr);
 205         close(outpipe[1]);
 206
 207         wait(&waitstat);
 208
 209         progressmeter(1);
 210         return 0;
 211 }