Colony » Colony Scout » Colony Scout OS

/*

 * Copyright (c) 1989, 1993

 *        The Regents of the University of California.  All rights reserved.

 *

 * This code is derived from software contributed to Berkeley by

 * Kevin Fall.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

/* modified by Kohsuke Ohtani for Prex. */

#include <sys/stat.h>

#include <sys/fcntl.h>

#include <err.h>

#include <unistd.h>

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#ifdef CMDBOX

#define main(argc, argv)        cat_main(argc, argv)

#endif

static void do_cat(int rfd);

static char *stdbuf;

static char *filename;

static int rval;

int

main(int argc, char *argv[])

{

        int ch, fd;

        while ((ch = getopt(argc, argv, "")) != -1)

                switch(ch) {

                case '?':

                default:

                        fprintf(stderr, "usage: cat [-] [file ...]\n");

                        exit(1);

                        /* NOTREACHED */

                }

        argv += optind;

        if ((stdbuf = malloc(BUFSIZ)) == NULL)

                err(1, NULL);

        fd = fileno(stdin);

        filename = "stdin";

        do {

                if (*argv) {

                        if (!strcmp(*argv, "-"))

                                fd = fileno(stdin);

                        else if ((fd = open(*argv, O_RDONLY, 0)) < 0) {

                                warn("%s", *argv);

                                ++argv;

                                rval = 1;

                                continue;

                        }

                        filename = *argv++;

                }

                do_cat(fd);

                if (fd != fileno(stdin))

                        (void)close(fd);

        } while (*argv);

        free(stdbuf);

        exit(rval);

}

static void

do_cat(int rfd)

{

        int nr, nw, off, wfd;

        struct stat sbuf;

        wfd = fileno(stdout);

        if (fstat(wfd, &sbuf))

                err(1, "%s", filename);

        while ((nr = read(rfd, stdbuf, BUFSIZ)) > 0)

                for (off = 0; nr; nr -= nw, off += nw)

                        if ((nw = write(wfd, stdbuf + off, (size_t)nr)) < 0)

                                err(1, "stdout");

        if (nr < 0) {

                warn("%s @%d", filename, errno);

                rval = 1;

        }

}