8d3b64e3cb
Decode gzip -l output with strtoimax() (not sscanf()) so we don't use an uninitialised variable if the output format isn't what we expect. This might fix some installation PRs (no error being reported)
248 lines
6.2 KiB
C
248 lines
6.2 KiB
C
/* $NetBSD: progress.c,v 1.10 2005/02/23 22:32:31 dsl Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by John Hawkinson.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: progress.c,v 1.10 2005/02/23 22:32:31 dsl Exp $");
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <netinet/in.h>
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#include <arpa/ftp.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <glob.h>
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#include <signal.h>
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#include <limits.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <time.h>
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#include <tzfile.h>
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#include <unistd.h>
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#define GLOBAL /* force GLOBAL decls in progressbar.h to be
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* declared */
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#include "progressbar.h"
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static void usage(void);
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int main(int, char *[]);
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: %s [-z] [-f file] [-l length] [-p prefix] cmd [args...]\n",
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getprogname());
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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static char fb_buf[BUFSIZ];
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char *infile = NULL;
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pid_t pid = 0, gzippid = 0, deadpid;
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int ch, fd, outpipe[2];
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int ws, gzipstat, cmdstat;
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int lflag = 0, zflag = 0;
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ssize_t nr, nw, off;
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struct stat statb;
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struct ttysize ts;
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setprogname(argv[0]);
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/* defaults: Read from stdin, 0 filesize (no completion estimate) */
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fd = STDIN_FILENO;
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filesize = 0;
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prefix=NULL;
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while ((ch = getopt(argc, argv, "f:l:p:z")) != -1)
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switch (ch) {
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case 'f':
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infile = optarg;
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break;
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case 'l':
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lflag++;
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filesize = strsuftoll("input size", optarg, 0,
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LLONG_MAX);
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break;
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case 'p':
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prefix = optarg;
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break;
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case 'z':
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zflag++;
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break;
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default:
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case '?':
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usage();
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/* NOTREACHED */
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}
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argc -= optind;
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argv += optind;
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if (argc < 1)
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usage();
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if (infile && (fd = open(infile, O_RDONLY, 0)) < 0)
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err(1, "%s", infile);
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/* stat() to get the filesize unless overridden, or -z */
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if (!zflag && !lflag && (fstat(fd, &statb) == 0))
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filesize = statb.st_size;
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/* gzip -l the file if we have the name and -z is given */
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if (zflag && !lflag && infile != NULL) {
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FILE *gzipsizepipe;
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char buf[256], *cp, *cmd;
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/*
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* Read second word of last line of gzip -l output. Looks like:
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* % gzip -l ../etc.tgz
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* compressed uncompressed ratio uncompressed_name
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* 119737 696320 82.8% ../etc.tar
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*/
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asprintf(&cmd, "gzip -l %s", infile);
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if ((gzipsizepipe = popen(cmd, "r")) == NULL)
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err(1, "reading compressed file length");
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for (; fgets(buf, 256, gzipsizepipe) != NULL;)
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continue;
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strtoimax(buf, &cp, 10);
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filesize = strtoimax(cp, NULL, 10);
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if (pclose(gzipsizepipe) < 0)
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err(1, "closing compressed file length pipe");
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free(cmd);
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}
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/* Pipe input through gzip -dc if -z is given */
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if (zflag) {
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int gzippipe[2];
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if (pipe(gzippipe) < 0)
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err(1, "gzip pipe");
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gzippid = fork();
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if (gzippid < 0)
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err(1, "fork for gzip");
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if (gzippid) {
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/* parent */
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dup2(gzippipe[0], fd);
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close(gzippipe[0]);
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close(gzippipe[1]);
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} else {
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dup2(gzippipe[1], STDOUT_FILENO);
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dup2(fd, STDIN_FILENO);
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close(gzippipe[0]);
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close(gzippipe[1]);
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if (execlp("gzip", "gzip", "-dc", NULL))
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err(1, "exec()ing gzip");
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}
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}
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/* Initialize progressbar.c's global state */
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bytes = 0;
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progress = 1;
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ttyout = stdout;
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if (ioctl(fileno(ttyout), TIOCGSIZE, &ts) == -1) {
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ttywidth = 80;
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} else
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ttywidth = ts.ts_cols;
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if (pipe(outpipe) < 0)
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err(1, "output pipe");
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pid = fork();
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if (pid < 0)
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err(1, "fork for output pipe");
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if (pid == 0) {
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/* child */
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dup2(outpipe[0], STDIN_FILENO);
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close(outpipe[0]);
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close(outpipe[1]);
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execvp(argv[0], argv);
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err(1, "could not exec %s", argv[0]);
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}
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close(outpipe[0]);
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progressmeter(-1);
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while ((nr = read(fd, fb_buf, BUFSIZ)) > 0)
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for (off = 0; nr; nr -= nw, off += nw, bytes += nw)
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if ((nw = write(outpipe[1], fb_buf + off,
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(size_t) nr)) < 0)
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err(1, "writing %u bytes to output pipe",
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(unsigned) nr);
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close(outpipe[1]);
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gzipstat = 0;
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cmdstat = 0;
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while (pid || gzippid) {
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deadpid = wait(&ws);
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/*
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* We need to exit with an error if the command (or gzip)
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* exited abnormally.
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* Unfortunately we can't generate a true 'exited by signal'
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* error without sending the signal to ourselves :-(
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*/
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ws = WIFSIGNALED(ws) ? WTERMSIG(ws) : WEXITSTATUS(ws);
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if (deadpid != -1 && errno == EINTR)
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continue;
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if (deadpid == pid) {
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pid = 0;
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cmdstat = ws;
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continue;
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}
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if (deadpid == gzippid) {
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gzippid = 0;
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gzipstat = ws;
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continue;
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}
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break;
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}
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progressmeter(1);
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exit(cmdstat ? cmdstat : gzipstat);
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}
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