scoutos / prex-0.9.0 / usr / bin / cat / cat.c @ 03e9c04a
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kevin Fall.
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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 University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* modified by Kohsuke Ohtani for Prex. */
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#include <sys/stat.h> |
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#include <sys/fcntl.h> |
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#include <err.h> |
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#include <unistd.h> |
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#include <errno.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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#ifdef CMDBOX
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#define main(argc, argv) cat_main(argc, argv)
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#endif
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static void do_cat(int rfd); |
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static char *stdbuf; |
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static char *filename; |
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static int rval; |
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int
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main(int argc, char *argv[]) |
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{ |
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int ch, fd;
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while ((ch = getopt(argc, argv, "")) != -1) |
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switch(ch) {
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case '?': |
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default:
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fprintf(stderr, "usage: cat [-] [file ...]\n");
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exit(1);
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/* NOTREACHED */
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} |
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argv += optind; |
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if ((stdbuf = malloc(BUFSIZ)) == NULL) |
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err(1, NULL); |
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fd = fileno(stdin); |
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filename = "stdin";
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do {
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if (*argv) {
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if (!strcmp(*argv, "-")) |
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fd = fileno(stdin); |
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else if ((fd = open(*argv, O_RDONLY, 0)) < 0) { |
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warn("%s", *argv);
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++argv; |
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rval = 1;
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continue;
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} |
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filename = *argv++; |
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} |
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do_cat(fd); |
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if (fd != fileno(stdin))
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(void)close(fd);
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} while (*argv);
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free(stdbuf); |
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exit(rval); |
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} |
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static void |
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do_cat(int rfd)
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{ |
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int nr, nw, off, wfd;
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struct stat sbuf;
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wfd = fileno(stdout); |
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if (fstat(wfd, &sbuf))
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err(1, "%s", filename); |
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while ((nr = read(rfd, stdbuf, BUFSIZ)) > 0) |
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for (off = 0; nr; nr -= nw, off += nw) |
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if ((nw = write(wfd, stdbuf + off, (size_t)nr)) < 0) |
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err(1, "stdout"); |
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if (nr < 0) { |
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warn("%s @%d", filename, errno);
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rval = 1;
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} |
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} |