/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the original program's authors 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <string.h>
#include <fcntl.h>
#include "config.h"
#include "util.h"
#include "errors.h"
#include "entry.h"
#include "cp.h"
#include "cmds.h"
#define CP_VERSION "0.0.1"
#define CP_DEFAULT_BUFLEN 1024
static const char *cmdname = "cp";
static struct option const long_options[] = {
{ "buffer", required_argument, 0, 'b' },
{ "force", no_argument, 0, 'f' },
{ "recursive", no_argument, 0, 'r' },
{ "help", no_argument, 0, 'h' },
{ "version", no_argument, 0, 'v' },
{ "verbose", no_argument, 0, 'V' },
{ 0, 0, 0, 0 }
};
static int strtoint(const char *s1)
{
long t1;
if (-1 == (t1
= strtol(s1
, (char **) NULL
, 10))) return -1;
if (t1 <= 0)
return -1;
return (int) t1;
}
static int64_t copy_file(const char *src, const char *dest, size_t blen, int vb)
{
int fd1, fd2, bytes = 0;
off_t total = 0;
int64_t copied = 0;
char *buff = NULL;
if (vb)
printf("Copying %s to %s\n", src
, dest
);
if (-1 == (fd1 = open(src, O_RDONLY))) {
printf("Unable to open source file %s\n", src
); return -1;
}
if (-1 == (fd2 = open(dest, O_CREAT))) {
printf("Unable to open destination file %s\n", dest
); close(fd1);
return -1;
}
total = lseek(fd1, 0, SEEK_END);
if (vb)
printf("%d bytes to copy\n", total
);
lseek(fd1, 0, SEEK_SET);
if (NULL
== (buff
= (char *) malloc(blen
))) { printf("Unable to allocate enough memory to read %s\n", src);
copied = -1;
goto out;
}
for (;;) {
ssize_t res;
bytes = read(fd1, buff, blen);
if (bytes <= 0)
break;
copied += bytes;
res = bytes;
do {
/*
* Theoretically, it may not be enough to call write()
* only once. Also the previous read() may have
* returned less data than requested.
*/
bytes = write(fd2, buff, res);
if (bytes < 0)
goto err;
res -= bytes;
} while (res > 0);
/* TODO: re-insert assert() once this is stand alone,
* removed as abort() exits the entire shell
*/
if (res != 0) {
printf("\n%d more bytes than actually exist were copied\n", res
); goto err;
}
}
if (bytes < 0) {
err:
printf("\nError copying %s, (%d)\n", src
, bytes
); copied = bytes;
}
out:
close(fd1);
close(fd2);
if (buff)
return copied;
}
void help_cmd_cp(unsigned int level)
{
static char helpfmt[] =
"Usage: %s [options] <source> <dest>\n"
"Options: (* indicates not yet implemented)\n"
" -h, --help A short option summary\n"
" -v, --version Print version information and exit\n"
"* -V, --verbose Be annoyingly noisy about what's being done\n"
"* -f, --force Do not complain when <dest> exists\n"
"* -r, --recursive Copy entire directories\n"
" -b, --buffer ## Set the read buffer size to ##\n"
"Currently, %s is under development, some options may not work.\n";
if (level == HELP_SHORT) {
printf("`%s' copies files and directories\n", cmdname
); } else {
help_cmd_cp(HELP_SHORT);
printf(helpfmt
, cmdname
, cmdname
); }
return;
}
int cmd_cp(char **argv)
{
unsigned int argc, buffer = 0, verbose = 0;
int c, opt_ind;
int64_t ret;
argc = cli_count_args(argv);
for (c = 0, optind = 0, opt_ind = 0; c != -1;) {
c = getopt_long(argc, argv, "hvVfrb:", long_options, &opt_ind);
switch (c) {
case 'h':
help_cmd_cp(1);
return CMD_SUCCESS;
case 'v':
return CMD_SUCCESS;
case 'V':
verbose = 1;
break;
case 'f':
break;
case 'r':
break;
case 'b':
if (-1 == (buffer = strtoint(optarg))) {
printf("%s: Invalid buffer specification, " "(should be a number greater than zero)\n",
cmdname);
return CMD_FAILURE;
}
if (verbose)
printf("Buffer = %d\n", buffer
); break;
}
}
if (buffer == 0)
buffer = CP_DEFAULT_BUFLEN;
argc -= optind;
if (argc != 2) {
printf("%s: invalid number of arguments. Try %s --help\n", cmdname, cmdname);
return CMD_FAILURE;
}
ret = copy_file(argv[optind], argv[optind + 1], buffer, verbose);
if (verbose)
printf("%d bytes copied\n", ret
);
if (ret >= 0)
return CMD_SUCCESS;
else
return CMD_FAILURE;
}