summaryrefslogtreecommitdiffstats
path: root/stream/stream_file.c
blob: c62249bf768dd24bb1af9a2569f36d867c05c021 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
/*
 * This file is part of MPlayer.
 *
 * Original authors: Albeu, probably Arpi
 *
 * MPlayer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MPlayer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>

#include "osdep/io.h"

#include "common/msg.h"
#include "stream.h"
#include "options/m_option.h"
#include "options/path.h"

#if HAVE_BSD_FSTATFS
#include <sys/param.h>
#include <sys/mount.h>
#endif

#if HAVE_LINUX_FSTATFS
#include <sys/vfs.h>
#endif

#ifdef __MINGW32__
#include <windows.h>
#endif

struct priv {
    int fd;
    bool close;
};

static int fill_buffer(stream_t *s, char *buffer, int max_len)
{
    struct priv *p = s->priv;
    int r = read(p->fd, buffer, max_len);
    return (r <= 0) ? -1 : r;
}

static int write_buffer(stream_t *s, char *buffer, int len)
{
    struct priv *p = s->priv;
    int r;
    int wr = 0;
    while (wr < len) {
        r = write(p->fd, buffer, len);
        if (r <= 0)
            return -1;
        wr += r;
        buffer += r;
    }
    return len;
}

static int seek(stream_t *s, int64_t newpos)
{
    struct priv *p = s->priv;
    return lseek(p->fd, newpos, SEEK_SET) != (off_t)-1;
}

static int control(stream_t *s, int cmd, void *arg)
{
    struct priv *p = s->priv;
    switch (cmd) {
    case STREAM_CTRL_GET_SIZE: {
        off_t size;

        size = lseek(p->fd, 0, SEEK_END);
        lseek(p->fd, s->pos, SEEK_SET);
        if (size != (off_t)-1) {
            *(uint64_t *)arg = size;
            return 1;
        }
    }
    }
    return STREAM_UNSUPPORTED;
}

static void s_close(stream_t *s)
{
    struct priv *p = s->priv;
    if (p->close && p->fd >= 0)
        close(p->fd);
}

// If url is a file:// URL, return the local filename, otherwise return NULL.
char *mp_file_url_to_filename(void *talloc_ctx, bstr url)
{
    bstr proto = mp_split_proto(url, &url);
    if (bstrcasecmp0(proto, "file") != 0)
        return NULL;
    char *filename = bstrto0(talloc_ctx, url);
    mp_url_unescape_inplace(filename);
#if HAVE_DOS_PATHS
    // extract '/' from '/x:/path'
    if (filename[0] == '/' && filename[1] && filename[2] == ':')
        memmove(filename, filename + 1, strlen(filename)); // including \0
#endif
    return filename;
}

#if HAVE_BSD_FSTATFS
static bool check_stream_network(stream_t *stream)
{
    struct statfs fs;
    const char *stypes[] = { "afpfs", "nfs", "smbfs", "webdav", NULL };
    struct priv *priv = stream->priv;
    if (fstatfs(priv->fd, &fs) == 0)
        for (int i=0; stypes[i]; i++)
            if (strcmp(stypes[i], fs.f_fstypename) == 0)
                return true;
    return false;

}
#elif HAVE_LINUX_FSTATFS
static bool check_stream_network(stream_t *stream)
{
    struct statfs fs;
    const uint32_t stypes[] = {
        0x5346414F  /*AFS*/,    0x61756673  /*AUFS*/,   0x00C36400  /*CEPH*/,
        0xFF534D42  /*CIFS*/,   0x73757245  /*CODA*/,   0x19830326  /*FHGFS*/,
        0x65735546  /*FUSEBLK*/,0x65735543  /*FUSECTL*/,0x1161970   /*GFS*/,
        0x47504653  /*GPFS*/,   0x6B414653  /*KAFS*/,   0x0BD00BD0  /*LUSTRE*/,
        0x564C      /*NCP*/,    0x6969      /*NFS*/,    0x6E667364  /*NFSD*/,
        0xAAD7AAEA  /*PANFS*/,  0x50495045  /*PIPEFS*/, 0x517B      /*SMB*/,
        0xBEEFDEAD  /*SNFS*/,   0xBACBACBC  /*VMHGFS*/, 0x7461636f  /*OCFS2*/,
        0
    };
    struct priv *priv = stream->priv;
    if (fstatfs(priv->fd, &fs) == 0) {
        for (int i=0; stypes[i]; i++) {
            if (stypes[i] == fs.f_type)
                return true;
        }
    }
    return false;

}
#elif defined(__MINGW32__)
static bool check_stream_network(stream_t *stream)
{
    wchar_t volume[MAX_PATH];
    wchar_t *path = mp_from_utf8(NULL, stream->path);
    bool remote = false;

    if (GetVolumePathNameW(path, volume, MAX_PATH))
        remote = GetDriveTypeW(volume) == DRIVE_REMOTE;

    talloc_free(path);
    return remote;
}
#else
static bool check_stream_network(stream_t *stream)
{
    return false;
}
#endif

static int open_f(stream_t *stream, int mode)
{
    int fd;
    struct priv *priv = talloc_ptrtype(stream, priv);
    *priv = (struct priv) {
        .fd = -1
    };
    stream->priv = priv;

    int m = O_CLOEXEC;
    if (mode == STREAM_READ)
        m |= O_RDONLY;
    else if (mode == STREAM_WRITE)
        m |= O_RDWR | O_CREAT | O_TRUNC;
    else {
        MP_ERR(stream, "Unknown open mode %d\n", mode);
        return STREAM_UNSUPPORTED;
    }

    char *filename = mp_file_url_to_filename(stream, bstr0(stream->url));
    if (filename) {
        stream->path = filename;
    } else {
        filename = stream->path;
    }

    if (!strcmp(filename, "-")) {
        if (mode == STREAM_READ) {
            MP_INFO(stream, "Reading from stdin...\n");
            fd = 0;
#if HAVE_SETMODE
            setmode(fileno(stdin), O_BINARY);
#endif
        } else {
            MP_INFO(stream, "Writing to stdout\n");
            fd = 1;
#if HAVE_SETMODE
            setmode(fileno(stdout), O_BINARY);
#endif
        }
        priv->fd = fd;
        priv->close = false;
    } else {
        mode_t openmode = S_IRUSR | S_IWUSR;
#ifndef __MINGW32__
        openmode |= S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
#endif
        fd = open(filename, m | O_BINARY, openmode);
        if (fd < 0) {
            MP_ERR(stream, "Cannot open file '%s': %s\n",
                    filename, strerror(errno));
            return STREAM_ERROR;
        }
#ifndef __MINGW32__
        struct stat st;
        if (fstat(fd, &st) == 0 && S_ISDIR(st.st_mode)) {
            MP_ERR(stream, "File is a directory: '%s'\n", filename);
            close(fd);
            return STREAM_ERROR;
        }
#endif
        priv->fd = fd;
        priv->close = true;
    }

    int64_t len = lseek(fd, 0, SEEK_END);
    lseek(fd, 0, SEEK_SET);
#ifdef __MINGW32__
    // seeks on stdin incorrectly succeed on MinGW
    if (fd == 0)
        len = -1;
#endif
    stream->type = STREAMTYPE_FILE;
    stream->flags = MP_STREAM_FAST_SKIPPING;
    if (len >= 0) {
        stream->seek = seek;
        stream->end_pos = len;
    }

    MP_VERBOSE(stream, "File size is %" PRId64 " bytes\n", len);

    stream->fill_buffer = fill_buffer;
    stream->write_buffer = write_buffer;
    stream->control = control;
    stream->read_chunk = 64 * 1024;
    stream->close = s_close;

    if (check_stream_network(stream))
        stream->streaming = true;

    return STREAM_OK;
}

const stream_info_t stream_info_file = {
    .name = "file",
    .open = open_f,
    .protocols = (const char*[]){ "file", "", NULL },
};