Switch to the new afs.
[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 "error.h"
16 #include "string.h"
17 #include "fd.h"
18 #include "server.cmdline.h"
19 #include "afh.h"
20 #include "afs.h"
21 #include "server.h"
22 #include "vss.h"
23 #include <dirent.h> /* readdir() */
24 #include <sys/stat.h> /* stat */
25 #include <sys/types.h> /* mode_t */
26
27 /**
28 * Traverse the given directory recursively.
29 *
30 * \param dirname The directory to traverse.
31 * \param f The function to call for each entry.
32 *
33 * For each regular file whose filename ends in .yyy, where yyy is a supported
34 * audio format, the supplied function \a f is called. The directory and
35 * filename component of the regular file are passed to \a f.
36 *
37 * \return On success, 1 is returned. Otherwise, this function returns a
38 * negative value which indicates the kind of the error.
39 */
40 int find_audio_files(const char *dirname, int (*f)(const char *, const char *))
41 {
42 DIR *dir = NULL;
43 int ret, ret2, cwd_fd;
44 struct dirent *entry;
45
46 ret = para_opendir(dirname, &dir, &cwd_fd);
47 if (ret < 0)
48 return ret;
49 /* scan cwd recursively */
50 while ((entry = readdir(dir))) {
51 mode_t m;
52 char *tmp;
53 struct stat s;
54
55 if (!strcmp(entry->d_name, "."))
56 continue;
57 if (!strcmp(entry->d_name, ".."))
58 continue;
59 ret = -E_LSTAT;
60 if (lstat(entry->d_name, &s) == -1)
61 continue;
62 m = s.st_mode;
63 if (!S_ISREG(m) && !S_ISDIR(m)) /* skip links, sockets, ... */
64 continue;
65 if (S_ISREG(m)) { /* regular file */
66 if (guess_audio_format(entry->d_name) < 0)
67 continue;
68 ret = f(dirname, entry->d_name);
69 if (ret < 0)
70 goto out;
71 continue;
72 }
73 /* directory */
74 tmp = make_message("%s/%s", dirname, entry->d_name);
75 ret = find_audio_files(tmp, f);
76 free(tmp);
77 if (ret < 0)
78 goto out;
79 }
80 ret = 1;
81 out:
82 if (dir)
83 closedir(dir);
84 ret2 = fchdir(cwd_fd);
85 if (ret2 < 0 && ret >= 0)
86 ret = ret2;
87 close(cwd_fd);
88 if (ret < 0)
89 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
90 return ret;
91 }