afs.c: Fix documentation of stdin_command().
[paraslash.git] / afs_common.c
1 /*
2 * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7
8 /** \file afs_common.c Functions common to all audio file selectors. */
9
10 #include <sys/types.h>
11 #include <dirent.h>
12
13
14 #include "para.h"
15 #include "fd.h"
16 #include "server.cmdline.h"
17 #include "afh.h"
18 #include "server.h"
19 #include "vss.h"
20 #include <dirent.h> /* readdir() */
21 #include <sys/stat.h> /* stat */
22 #include <sys/types.h> /* mode_t */
23 #include "error.h"
24 #include "string.h"
25
26 /**
27 * Traverse the given directory recursively.
28 *
29 * \param dirname The directory to traverse.
30 * \param f The function to call for each entry.
31 *
32 * For each regular file whose filename ends in .yyy, where yyy is a supported
33 * audio format, the supplied function \a f is called. The directory and
34 * filename component of the regular file are passed to \a f.
35 *
36 * \return On success, 1 is returned. Otherwise, this function returns a
37 * negative value which indicates the kind of the error.
38 */
39 int find_audio_files(const char *dirname, int (*f)(const char *, const char *))
40 {
41 DIR *dir = NULL;
42 int ret, ret2, cwd_fd;
43 struct dirent *entry;
44
45 ret = para_opendir(dirname, &dir, &cwd_fd);
46 if (ret < 0)
47 return ret;
48 /* scan cwd recursively */
49 while ((entry = readdir(dir))) {
50 mode_t m;
51 char *tmp;
52 struct stat s;
53
54 if (!strcmp(entry->d_name, "."))
55 continue;
56 if (!strcmp(entry->d_name, ".."))
57 continue;
58 ret = -E_LSTAT;
59 if (lstat(entry->d_name, &s) == -1)
60 continue;
61 m = s.st_mode;
62 if (!S_ISREG(m) && !S_ISDIR(m)) /* skip links, sockets, ... */
63 continue;
64 if (S_ISREG(m)) { /* regular file */
65 if (guess_audio_format(entry->d_name) < 0)
66 continue;
67 ret = f(dirname, entry->d_name);
68 if (ret < 0)
69 goto out;
70 continue;
71 }
72 /* directory */
73 tmp = make_message("%s/%s", dirname, entry->d_name);
74 ret = find_audio_files(tmp, f);
75 free(tmp);
76 if (ret < 0)
77 goto out;
78 }
79 ret = 1;
80 out:
81 if (dir)
82 closedir(dir);
83 ret2 = fchdir(cwd_fd);
84 if (ret2 < 0 && ret >= 0)
85 ret = ret2;
86 close(cwd_fd);
87 if (ret < 0)
88 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
89 return ret;
90 }