server: Deplete user list on exit.
[paraslash.git] / afh.c
1 /* Copyright (C) 2008 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
2
3 /** \file afh.c Paraslash's standalone audio format handler tool. */
4
5 #include <regex.h>
6 #include <lopsub.h>
7
8 #include "afh.lsg.h"
9 #include "para.h"
10 #include "string.h"
11 #include "fd.h"
12 #include "afh.h"
13 #include "error.h"
14 #include "version.h"
15
16 /** Array of error strings. */
17 DEFINE_PARA_ERRLIST;
18
19 static struct lls_parse_result *lpr;
20
21 #define CMD_PTR (lls_cmd(0, afh_suite))
22 #define OPT_RESULT(_name) (lls_opt_result(LSG_AFH_PARA_AFH_OPT_ ## _name, lpr))
23 #define OPT_GIVEN(_name) (lls_opt_given(OPT_RESULT(_name)))
24 #define OPT_STRING_VAL(_name) (lls_string_val(0, OPT_RESULT(_name)))
25 #define OPT_UINT32_VAL(_name) (lls_uint32_val(0, OPT_RESULT(_name)))
26
27 static int loglevel;
28 INIT_STDERR_LOGGING(loglevel)
29
30 static inline bool tag_needs_update(bool given, const char *tag,
31 const char *arg)
32 {
33 return given && (!tag || strcmp(tag, arg) != 0);
34 }
35
36 static int rewrite_tags(const char *name, int input_fd, void *map,
37 size_t map_size, int audio_format_id, struct afh_info *afhi)
38 {
39 struct taginfo *tags = &afhi->tags;
40 bool modified = false;
41 char *tmp_name;
42 const char *arg;
43 int output_fd = -1, ret;
44 struct stat sb;
45
46 arg = OPT_STRING_VAL(YEAR);
47 if (tag_needs_update(OPT_GIVEN(YEAR), tags->year, arg)) {
48 free(tags->year);
49 tags->year = para_strdup(arg);
50 modified = true;
51 }
52 arg = OPT_STRING_VAL(TITLE);
53 if (tag_needs_update(OPT_GIVEN(TITLE), tags->title, arg)) {
54 free(tags->title);
55 tags->title = para_strdup(arg);
56 modified = true;
57 }
58 arg = OPT_STRING_VAL(ARTIST);
59 if (tag_needs_update(OPT_GIVEN(ARTIST), tags->artist, arg)) {
60 free(tags->artist);
61 tags->artist = para_strdup(arg);
62 modified = true;
63 }
64 arg = OPT_STRING_VAL(ALBUM);
65 if (tag_needs_update(OPT_GIVEN(ALBUM), tags->album, arg)) {
66 free(tags->album);
67 tags->album = para_strdup(arg);
68 modified = true;
69 }
70 arg = OPT_STRING_VAL(COMMENT);
71 if (tag_needs_update(OPT_GIVEN(COMMENT), tags->comment, arg)) {
72 free(tags->comment);
73 tags->comment = para_strdup(arg);
74 modified = true;
75 }
76 if (!modified) {
77 PARA_WARNING_LOG("no modifications necessary\n");
78 return 0;
79 }
80 /*
81 * mkstmp() creates the temporary file with permissions 0600, but we
82 * like it to have the same permissions as the original file, so we
83 * have to get this information.
84 */
85 if (fstat(input_fd, &sb) < 0) {
86 ret = -ERRNO_TO_PARA_ERROR(errno);
87 PARA_ERROR_LOG("failed to fstat fd %d (%s)\n", input_fd, name);
88 return ret;
89 }
90 tmp_name = make_message("%s.XXXXXX", name);
91 ret = mkstemp(tmp_name);
92 if (ret < 0) {
93 ret = -ERRNO_TO_PARA_ERROR(errno);
94 PARA_ERROR_LOG("could not create temporary file\n");
95 goto out;
96 }
97 output_fd = ret;
98 if (fchmod(output_fd, sb.st_mode) < 0) {
99 ret = -ERRNO_TO_PARA_ERROR(errno);
100 PARA_ERROR_LOG("failed to fchmod fd %d (%s)\n", output_fd,
101 tmp_name);
102 goto out;
103 }
104 ret = afh_rewrite_tags(audio_format_id, map, map_size, tags, output_fd,
105 tmp_name);
106 if (ret < 0)
107 goto out;
108 if (OPT_GIVEN(BACKUP)) {
109 char *backup_name = make_message("%s~", name);
110 ret = xrename(name, backup_name);
111 free(backup_name);
112 if (ret < 0)
113 goto out;
114 }
115 ret = xrename(tmp_name, name);
116 out:
117 if (ret < 0 && output_fd >= 0)
118 unlink(tmp_name); /* ignore errors */
119 free(tmp_name);
120 if (output_fd >= 0)
121 close(output_fd);
122 return ret;
123 }
124
125 static void print_info(int audio_format_num, struct afh_info *afhi)
126 {
127 char *msg;
128
129 afh_get_afhi_txt(audio_format_num, afhi, &msg);
130 printf("%s", msg);
131 free(msg);
132 }
133
134 static void print_chunk_table(struct afh_info *afhi, int audio_format_id,
135 const void *map, size_t mapsize)
136 {
137 int i, ret;
138 void *ctx = NULL;
139
140 for (i = 0; i < afhi->chunks_total; i++) {
141 struct timeval tv;
142 long unsigned from, to;
143 const char *buf;
144 size_t len;
145 tv_scale(i, &afhi->chunk_tv, &tv);
146 from = tv2ms(&tv);
147 tv_scale(i + 1, &afhi->chunk_tv, &tv);
148 to = tv2ms(&tv);
149 ret = afh_get_chunk(i, afhi, audio_format_id, map, mapsize,
150 &buf, &len, &ctx);
151 if (ret < 0) {
152 PARA_ERROR_LOG("fatal: chunk %d: %s\n", i,
153 para_strerror(-ret));
154 return;
155 }
156 if (!OPT_GIVEN(PARSER_FRIENDLY))
157 printf("%d [%lu.%03lu - %lu.%03lu] ", i, from / 1000,
158 from % 1000, to / 1000, to % 1000);
159 printf("%td - %td", buf - (const char *)map,
160 buf + len - (const char *)map);
161 if (!OPT_GIVEN(PARSER_FRIENDLY))
162 printf(" (%zu)", len);
163 printf("\n");
164 }
165 afh_close(ctx, audio_format_id);
166 }
167
168 static void handle_help_flags(void)
169 {
170 char *help;
171
172 if (OPT_GIVEN(DETAILED_HELP))
173 help = lls_long_help(CMD_PTR);
174 else if (OPT_GIVEN(HELP) || lls_num_inputs(lpr) == 0)
175 help = lls_short_help(CMD_PTR);
176 else
177 return;
178 printf("%s", help);
179 free(help);
180 printf("Supported audio formats\n %s\n", AUDIO_FORMAT_HANDLERS);
181 exit(EXIT_SUCCESS);
182 }
183
184 /**
185 * The main function of para_afh.
186 *
187 * \param argc Usual argument count.
188 * \param argv Usual argument vector.
189 *
190 * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
191 */
192 int main(int argc, char **argv)
193 {
194 int i, ret = 0, audio_format_num, fd;
195 void *audio_file_data;
196 size_t audio_file_size;
197 struct afh_info afhi;
198 char *errctx;
199
200 ret = lls(lls_parse(argc, argv, CMD_PTR, &lpr, &errctx));
201 if (ret < 0)
202 goto out;
203 loglevel = OPT_UINT32_VAL(LOGLEVEL);
204 version_handle_flag("afh", OPT_GIVEN(VERSION));
205 handle_help_flags();
206 afh_init();
207 for (i = 0; i < lls_num_inputs(lpr); i++) {
208 int ret2;
209 const char *path = lls_input(i, lpr);
210 ret = mmap_full_file(path, O_RDONLY, &audio_file_data,
211 &audio_file_size, &fd);
212 if (ret < 0) {
213 PARA_ERROR_LOG("failed to mmap \"%s\"\n", path);
214 goto out;
215 }
216 ret = compute_afhi(path, audio_file_data, audio_file_size,
217 fd, &afhi);
218 if (ret >= 0) {
219 audio_format_num = ret;
220 if (OPT_GIVEN(MODIFY)) {
221 ret = rewrite_tags(path, fd, audio_file_data,
222 audio_file_size, audio_format_num, &afhi);
223 } else {
224 printf("File %d: %s\n", i + 1, path);
225 print_info(audio_format_num, &afhi);
226 if (OPT_GIVEN(CHUNK_TABLE))
227 print_chunk_table(&afhi, audio_format_num,
228 audio_file_data, audio_file_size);
229 }
230 clear_afhi(&afhi);
231 }
232 close(fd);
233 ret2 = para_munmap(audio_file_data, audio_file_size);
234 if (ret2 < 0 && ret >= 0)
235 ret = ret2;
236 if (ret < 0)
237 break;
238 }
239 out:
240 if (errctx)
241 PARA_ERROR_LOG("%s\n", errctx);
242 if (ret < 0)
243 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
244 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
245 }