FFmpeg 7.1.1
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avio_list_dir.c
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1/*
2 * Copyright (c) 2014 Lukasz Marek
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
21 */
22
23/**
24 * @file libavformat AVIOContext list directory API usage example
25 * @example avio_list_dir.c
26 *
27 * Show how to list directories through the libavformat AVIOContext API.
28 */
29
30#include <libavcodec/avcodec.h>
32#include <libavformat/avio.h>
33
34static const char *type_string(int type)
35{
36 switch (type) {
38 return "<DIR>";
39 case AVIO_ENTRY_FILE:
40 return "<FILE>";
42 return "<BLOCK DEVICE>";
44 return "<CHARACTER DEVICE>";
46 return "<PIPE>";
48 return "<LINK>";
50 return "<SOCKET>";
52 return "<SERVER>";
54 return "<SHARE>";
56 return "<WORKGROUP>";
58 default:
59 break;
60 }
61 return "<UNKNOWN>";
62}
63
64static int list_op(const char *input_dir)
65{
66 AVIODirEntry *entry = NULL;
67 AVIODirContext *ctx = NULL;
68 int cnt, ret;
69 char filemode[4], uid_and_gid[20];
70
71 if ((ret = avio_open_dir(&ctx, input_dir, NULL)) < 0) {
72 av_log(NULL, AV_LOG_ERROR, "Cannot open directory: %s.\n", av_err2str(ret));
73 goto fail;
74 }
75
76 cnt = 0;
77 for (;;) {
78 if ((ret = avio_read_dir(ctx, &entry)) < 0) {
79 av_log(NULL, AV_LOG_ERROR, "Cannot list directory: %s.\n", av_err2str(ret));
80 goto fail;
81 }
82 if (!entry)
83 break;
84 if (entry->filemode == -1) {
85 snprintf(filemode, 4, "???");
86 } else {
87 snprintf(filemode, 4, "%3"PRIo64, entry->filemode);
88 }
89 snprintf(uid_and_gid, 20, "%"PRId64"(%"PRId64")", entry->user_id, entry->group_id);
90 if (cnt == 0)
91 av_log(NULL, AV_LOG_INFO, "%-9s %12s %30s %10s %s %16s %16s %16s\n",
92 "TYPE", "SIZE", "NAME", "UID(GID)", "UGO", "MODIFIED",
93 "ACCESSED", "STATUS_CHANGED");
94 av_log(NULL, AV_LOG_INFO, "%-9s %12"PRId64" %30s %10s %s %16"PRId64" %16"PRId64" %16"PRId64"\n",
95 type_string(entry->type),
96 entry->size,
97 entry->name,
98 uid_and_gid,
99 filemode,
101 entry->access_timestamp,
104 cnt++;
105 };
106
107 fail:
108 avio_close_dir(&ctx);
109 return ret;
110}
111
112static void usage(const char *program_name)
113{
114 fprintf(stderr, "usage: %s input_dir\n"
115 "API example program to show how to list files in directory "
116 "accessed through AVIOContext.\n", program_name);
117}
118
119int main(int argc, char *argv[])
120{
121 int ret;
122
124
125 if (argc < 2) {
126 usage(argv[0]);
127 return 1;
128 }
129
131
132 ret = list_op(argv[1]);
133
135
136 return ret < 0 ? 1 : 0;
137}
Libavcodec external API header.
Main libavformat public API header.
Buffered I/O operations.
struct AVIODirContext AVIODirContext
Definition avio.h:104
int avio_close_dir(AVIODirContext **s)
Close directory.
int avio_open_dir(AVIODirContext **s, const char *url, AVDictionary **options)
Open directory for reading.
void avio_free_directory_entry(AVIODirEntry **entry)
Free entry allocated by avio_read_dir().
int avio_read_dir(AVIODirContext *s, AVIODirEntry **next)
Get next directory entry.
@ AVIO_ENTRY_UNKNOWN
Definition avio.h:68
@ AVIO_ENTRY_NAMED_PIPE
Definition avio.h:72
@ AVIO_ENTRY_WORKGROUP
Definition avio.h:78
@ AVIO_ENTRY_SERVER
Definition avio.h:76
@ AVIO_ENTRY_SHARE
Definition avio.h:77
@ AVIO_ENTRY_BLOCK_DEVICE
Definition avio.h:69
@ AVIO_ENTRY_SYMBOLIC_LINK
Definition avio.h:73
@ AVIO_ENTRY_DIRECTORY
Definition avio.h:71
@ AVIO_ENTRY_CHARACTER_DEVICE
Definition avio.h:70
@ AVIO_ENTRY_FILE
Definition avio.h:75
@ AVIO_ENTRY_SOCKET
Definition avio.h:74
int main(int argc, char *argv[])
static void usage(const char *program_name)
static const char * type_string(int type)
static int list_op(const char *input_dir)
int avformat_network_deinit(void)
Undo the initialization done by avformat_network_init.
int avformat_network_init(void)
Do global initialization of network libraries.
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition error.h:122
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition log.h:201
#define AV_LOG_INFO
Standard information.
Definition log.h:191
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition log.h:180
void av_log_set_level(int level)
Set the log level.
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level.
Describes single entry of the directory.
Definition avio.h:87
int64_t user_id
User ID of owner, -1 if unknown.
Definition avio.h:99
int type
Type of the entry.
Definition avio.h:89
int64_t access_timestamp
Time of last access in microseconds since unix epoch, -1 if unknown.
Definition avio.h:95
int64_t status_change_timestamp
Time of last status change in microseconds since unix epoch, -1 if unknown.
Definition avio.h:97
int64_t size
File size in bytes, -1 if unknown.
Definition avio.h:92
int64_t group_id
Group ID of owner, -1 if unknown.
Definition avio.h:100
char * name
Filename.
Definition avio.h:88
int64_t modification_timestamp
Time of last modification in microseconds since unix epoch, -1 if unknown.
Definition avio.h:93
int64_t filemode
Unix file mode, -1 if unknown.
Definition avio.h:101