Subversion Repositories HelenOS

Rev

Rev 3816 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
3420 post 1
/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
2
 * All rights reserved.
3
 *
4
 * Redistribution and use in source and binary forms, with or without
5
 * modification, are permitted provided that the following conditions are met:
6
 *
7
 * Redistributions of source code must retain the above copyright notice, this
8
 * list of conditions and the following disclaimer.
9
 *
10
 * Redistributions in binary form must reproduce the above copyright notice,
11
 * this list of conditions and the following disclaimer in the documentation
12
 * and/or other materials provided with the distribution.
13
 *
14
 * Neither the name of the original program's authors nor the names of its
15
 * contributors may be used to endorse or promote products derived from this
16
 * software without specific prior written permission.
17
 *
18
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28
 * POSSIBILITY OF SUCH DAMAGE.
29
 */
30
 
31
#include <stdio.h>
32
#include <stdlib.h>
3640 post 33
#include <unistd.h>
34
#include <getopt.h>
35
#include <string.h>
36
#include <fcntl.h>
3420 post 37
#include "config.h"
38
#include "util.h"
39
#include "errors.h"
40
#include "entry.h"
41
#include "cp.h"
42
#include "cmds.h"
43
 
3640 post 44
#define CP_VERSION "0.0.1"
45
#define CP_DEFAULT_BUFLEN  1024
3420 post 46
 
3640 post 47
static const char *cmdname = "cp";
48
 
49
static struct option const long_options[] = {
50
    { "buffer", required_argument, 0, 'b' },
51
    { "force", no_argument, 0, 'f' },
52
    { "recursive", no_argument, 0, 'r' },
53
    { "help", no_argument, 0, 'h' },
54
    { "version", no_argument, 0, 'v' },
55
    { "verbose", no_argument, 0, 'V' },
56
    { 0, 0, 0, 0 }
57
};
58
 
59
static int strtoint(const char *s1)
60
{
61
    long t1;
62
 
63
    if (-1 == (t1 = strtol(s1, (char **) NULL, 10)))
64
        return -1;
65
 
66
    if (t1 <= 0)
67
        return -1;
68
 
69
    return (int) t1;
70
}
71
 
3816 post 72
static int64_t copy_file(const char *src, const char *dest,
73
    size_t blen, int vb)
3640 post 74
{
75
    int fd1, fd2, bytes = 0;
76
    off_t total = 0;
3650 jermar 77
    int64_t copied = 0;
3640 post 78
    char *buff = NULL;
79
 
80
    if (vb)
81
        printf("Copying %s to %s\n", src, dest);
82
 
83
    if (-1 == (fd1 = open(src, O_RDONLY))) {
84
        printf("Unable to open source file %s\n", src);
3651 jermar 85
        return -1;
3640 post 86
    }
87
 
88
    if (-1 == (fd2 = open(dest, O_CREAT))) {
89
        printf("Unable to open destination file %s\n", dest);
3650 jermar 90
        close(fd1);
3651 jermar 91
        return -1;
3640 post 92
    }
93
 
94
    total = lseek(fd1, 0, SEEK_END);
95
 
96
    if (vb)
97
        printf("%d bytes to copy\n", total);
98
 
99
    lseek(fd1, 0, SEEK_SET);
100
 
3650 jermar 101
    if (NULL == (buff = (char *) malloc(blen))) {
3640 post 102
        printf("Unable to allocate enough memory to read %s\n",
3650 jermar 103
            src);
104
        copied = -1;
3640 post 105
        goto out;
106
    }
107
 
3650 jermar 108
    for (;;) {
109
        ssize_t res;
110
 
111
        bytes = read(fd1, buff, blen);
112
        if (bytes <= 0)
3640 post 113
            break;
114
        copied += bytes;
3650 jermar 115
        res = bytes;
116
        do {
117
            /*
118
             * Theoretically, it may not be enough to call write()
119
             * only once. Also the previous read() may have
120
             * returned less data than requested.
121
             */
122
            bytes = write(fd2, buff, res);
123
            if (bytes < 0)
124
                goto err;
125
            res -= bytes;
126
        } while (res > 0);
3815 post 127
 
128
        /* TODO: re-insert assert() once this is stand alone,
129
         * removed as abort() exits the entire shell
130
         */
131
        if (res != 0) {
132
            printf("\n%d more bytes than actually exist were copied\n", res);
133
            goto err;
134
        }
3650 jermar 135
    }
3640 post 136
 
3650 jermar 137
    if (bytes < 0) {
138
err:
3815 post 139
        printf("\nError copying %s, (%d)\n", src, bytes);
3642 post 140
        copied = bytes;
3640 post 141
    }
142
 
143
out:
144
    close(fd1);
145
    close(fd2);
146
    if (buff)
147
        free(buff);
148
    return copied;
149
}
150
 
3420 post 151
void help_cmd_cp(unsigned int level)
152
{
3650 jermar 153
    static char helpfmt[] =
154
        "Usage:  %s [options] <source> <dest>\n"
155
        "Options: (* indicates not yet implemented)\n"
156
        "  -h, --help       A short option summary\n"
157
        "  -v, --version    Print version information and exit\n"
158
        "* -V, --verbose    Be annoyingly noisy about what's being done\n"
159
        "* -f, --force      Do not complain when <dest> exists\n"
160
        "* -r, --recursive  Copy entire directories\n"
161
        "  -b, --buffer ## Set the read buffer size to ##\n"
162
        "Currently, %s is under development, some options may not work.\n";
3640 post 163
    if (level == HELP_SHORT) {
164
        printf("`%s' copies files and directories\n", cmdname);
165
    } else {
166
        help_cmd_cp(HELP_SHORT);
3650 jermar 167
        printf(helpfmt, cmdname, cmdname);
3640 post 168
    }
169
 
3420 post 170
    return;
171
}
172
 
173
int cmd_cp(char **argv)
174
{
4682 svoboda 175
    unsigned int argc, verbose = 0;
176
    int buffer = 0;
3642 post 177
    int c, opt_ind;
178
    int64_t ret;
3420 post 179
 
3640 post 180
    argc = cli_count_args(argv);
3420 post 181
 
3640 post 182
    for (c = 0, optind = 0, opt_ind = 0; c != -1;) {
183
        c = getopt_long(argc, argv, "hvVfrb:", long_options, &opt_ind);
184
        switch (c) {
185
        case 'h':
186
            help_cmd_cp(1);
187
            return CMD_SUCCESS;
188
        case 'v':
189
            printf("%d\n", CP_VERSION);
190
            return CMD_SUCCESS;
191
        case 'V':
192
            verbose = 1;
193
            break;
194
        case 'f':
195
            break;
196
        case 'r':
197
            break;
198
        case 'b':
199
            if (-1 == (buffer = strtoint(optarg))) {
200
                printf("%s: Invalid buffer specification, "
3650 jermar 201
                    "(should be a number greater than zero)\n",
202
                    cmdname);
3640 post 203
                return CMD_FAILURE;
204
            }
3645 post 205
            if (verbose)
206
                printf("Buffer = %d\n", buffer);
3640 post 207
            break;
208
        }
209
    }
3420 post 210
 
3645 post 211
    if (buffer == 0)
212
        buffer = CP_DEFAULT_BUFLEN;
213
 
3640 post 214
    argc -= optind;
215
 
216
    if (argc != 2) {
217
        printf("%s: invalid number of arguments. Try %s --help\n",
3650 jermar 218
            cmdname, cmdname);
3640 post 219
        return CMD_FAILURE;
3420 post 220
    }
221
 
3640 post 222
    ret = copy_file(argv[optind], argv[optind + 1], buffer, verbose);
3420 post 223
 
3640 post 224
    if (verbose)
3645 post 225
        printf("%d bytes copied\n", ret);
3640 post 226
 
3650 jermar 227
    if (ret >= 0)
3640 post 228
        return CMD_SUCCESS;
229
    else
230
        return CMD_FAILURE;
3420 post 231
}
232