1 | /* GIO - GLib Input, Output and Streaming Library |
2 | * |
3 | * Copyright (C) 2009 Red Hat, Inc. |
4 | * |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public |
7 | * License as published by the Free Software Foundation; either |
8 | * version 2.1 of the License, or (at your option) any later version. |
9 | * |
10 | * This library is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * Lesser General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU Lesser General |
16 | * Public License along with this library; if not, see <http://www.gnu.org/licenses/>. |
17 | * |
18 | * Author: Alexander Larsson <alexl@redhat.com> |
19 | */ |
20 | |
21 | #include <config.h> |
22 | |
23 | #include <stdio.h> |
24 | #include <locale.h> |
25 | #include <errno.h> |
26 | |
27 | #include <glib.h> |
28 | #include <gio/gio.h> |
29 | |
30 | #ifdef G_OS_UNIX |
31 | #include <unistd.h> |
32 | #endif |
33 | |
34 | #ifdef G_OS_WIN32 |
35 | #include <io.h> |
36 | #ifndef STDOUT_FILENO |
37 | #define STDOUT_FILENO 1 |
38 | #endif |
39 | #endif |
40 | |
41 | static gchar **locations = NULL; |
42 | static char *from_charset = NULL; |
43 | static char *to_charset = NULL; |
44 | static gboolean decompress = FALSE; |
45 | static gboolean compress = FALSE; |
46 | static gboolean gzip = FALSE; |
47 | static gboolean fallback = FALSE; |
48 | |
49 | static GOptionEntry entries[] = { |
50 | {"decompress" , 0, 0, G_OPTION_ARG_NONE, &decompress, "decompress" , NULL}, |
51 | {"compress" , 0, 0, G_OPTION_ARG_NONE, &compress, "compress" , NULL}, |
52 | {"gzip" , 0, 0, G_OPTION_ARG_NONE, &gzip, "use gzip format" , NULL}, |
53 | {"from-charset" , 0, 0, G_OPTION_ARG_STRING, &from_charset, "from charset" , NULL}, |
54 | {"to-charset" , 0, 0, G_OPTION_ARG_STRING, &to_charset, "to charset" , NULL}, |
55 | {"fallback" , 0, 0, G_OPTION_ARG_NONE, &fallback, "use fallback" , NULL}, |
56 | {G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &locations, "locations" , NULL}, |
57 | {NULL} |
58 | }; |
59 | |
60 | static void |
61 | decompressor_file_info_notify_cb (GZlibDecompressor *decompressor, |
62 | GParamSpec *pspec, |
63 | gpointer data) |
64 | { |
65 | GFileInfo *file_info; |
66 | const gchar *filename; |
67 | |
68 | file_info = g_zlib_decompressor_get_file_info (decompressor); |
69 | if (file_info == NULL) |
70 | return; |
71 | |
72 | filename = g_file_info_get_name (info: file_info); |
73 | if (filename) |
74 | g_printerr (format: "Decompressor filename: %s\n" , filename); |
75 | } |
76 | |
77 | static void |
78 | cat (GFile * file) |
79 | { |
80 | GInputStream *in; |
81 | char buffer[1024 * 8 + 1]; |
82 | char *p; |
83 | gssize res; |
84 | gboolean close_res; |
85 | GError *error; |
86 | GConverter *conv; |
87 | GCharsetConverter *cconv = NULL; |
88 | |
89 | error = NULL; |
90 | in = (GInputStream *) g_file_read (file, NULL, error: &error); |
91 | if (in == NULL) |
92 | { |
93 | /* Translators: the first %s is the program name, the second one */ |
94 | /* is the URI of the file, the third is the error message. */ |
95 | g_printerr (format: "%s: %s: error opening file: %s\n" , |
96 | g_get_prgname (), g_file_get_uri (file), error->message); |
97 | g_error_free (error); |
98 | return; |
99 | } |
100 | |
101 | if (decompress) |
102 | { |
103 | GInputStream *old; |
104 | conv = (GConverter *)g_zlib_decompressor_new (format: gzip?G_ZLIB_COMPRESSOR_FORMAT_GZIP:G_ZLIB_COMPRESSOR_FORMAT_ZLIB); |
105 | old = in; |
106 | in = (GInputStream *) g_converter_input_stream_new (base_stream: in, converter: conv); |
107 | g_signal_connect (conv, "notify::file-info" , G_CALLBACK (decompressor_file_info_notify_cb), NULL); |
108 | g_object_unref (object: conv); |
109 | g_object_unref (object: old); |
110 | } |
111 | |
112 | if (from_charset && to_charset) |
113 | { |
114 | cconv = g_charset_converter_new (to_charset, from_charset, error: &error); |
115 | conv = (GConverter *)cconv; |
116 | if (conv) |
117 | { |
118 | GInputStream *old; |
119 | |
120 | g_charset_converter_set_use_fallback (converter: cconv, use_fallback: fallback); |
121 | |
122 | old = in; |
123 | in = (GInputStream *) g_converter_input_stream_new (base_stream: in, converter: conv); |
124 | g_object_unref (object: conv); |
125 | g_object_unref (object: old); |
126 | } |
127 | else |
128 | { |
129 | g_printerr (format: "%s: Can't convert between charsets: %s\n" , |
130 | g_get_prgname (), error->message); |
131 | } |
132 | } |
133 | |
134 | if (compress) |
135 | { |
136 | GInputStream *old; |
137 | GFileInfo *in_file_info; |
138 | |
139 | in_file_info = g_file_query_info (file, |
140 | G_FILE_ATTRIBUTE_STANDARD_NAME "," |
141 | G_FILE_ATTRIBUTE_TIME_MODIFIED, |
142 | flags: G_FILE_QUERY_INFO_NONE, |
143 | NULL, |
144 | error: &error); |
145 | if (in_file_info == NULL) |
146 | { |
147 | g_printerr (format: "%s: %s: error reading file info: %s\n" , |
148 | g_get_prgname (), g_file_get_uri (file), error->message); |
149 | g_error_free (error); |
150 | return; |
151 | } |
152 | |
153 | conv = (GConverter *)g_zlib_compressor_new(format: gzip?G_ZLIB_COMPRESSOR_FORMAT_GZIP:G_ZLIB_COMPRESSOR_FORMAT_ZLIB, level: -1); |
154 | g_zlib_compressor_set_file_info (G_ZLIB_COMPRESSOR (conv), file_info: in_file_info); |
155 | old = in; |
156 | in = (GInputStream *) g_converter_input_stream_new (base_stream: in, converter: conv); |
157 | g_object_unref (object: conv); |
158 | g_object_unref (object: old); |
159 | g_object_unref (object: in_file_info); |
160 | } |
161 | |
162 | while (1) |
163 | { |
164 | res = |
165 | g_input_stream_read (stream: in, buffer, count: sizeof (buffer) - 1, NULL, error: &error); |
166 | if (res > 0) |
167 | { |
168 | gssize written; |
169 | |
170 | p = buffer; |
171 | while (res > 0) |
172 | { |
173 | written = write (STDOUT_FILENO, buf: p, n: res); |
174 | |
175 | if (written == -1 && errno != EINTR) |
176 | { |
177 | /* Translators: the first %s is the program name, the */ |
178 | /* second one is the URI of the file. */ |
179 | g_printerr (format: "%s: %s, error writing to stdout" , |
180 | g_get_prgname (), g_file_get_uri (file)); |
181 | goto out; |
182 | } |
183 | res -= written; |
184 | p += written; |
185 | } |
186 | } |
187 | else if (res < 0) |
188 | { |
189 | g_printerr (format: "%s: %s: error reading: %s\n" , |
190 | g_get_prgname (), g_file_get_uri (file), |
191 | error->message); |
192 | g_error_free (error); |
193 | error = NULL; |
194 | break; |
195 | } |
196 | else if (res == 0) |
197 | break; |
198 | } |
199 | |
200 | out: |
201 | |
202 | close_res = g_input_stream_close (stream: in, NULL, error: &error); |
203 | if (!close_res) |
204 | { |
205 | g_printerr (format: "%s: %s:error closing: %s\n" , |
206 | g_get_prgname (), g_file_get_uri (file), error->message); |
207 | g_error_free (error); |
208 | } |
209 | |
210 | if (cconv != NULL && fallback) |
211 | { |
212 | guint num = g_charset_converter_get_num_fallbacks (converter: cconv); |
213 | if (num > 0) |
214 | g_printerr (format: "Number of fallback errors: %u\n" , num); |
215 | } |
216 | } |
217 | |
218 | int |
219 | main (int argc, char *argv[]) |
220 | { |
221 | GError *error = NULL; |
222 | GOptionContext *context = NULL; |
223 | GFile *file; |
224 | int i; |
225 | |
226 | context = |
227 | g_option_context_new (parameter_string: "LOCATION... - concatenate LOCATIONS " |
228 | "to standard output." ); |
229 | |
230 | g_option_context_set_summary (context, summary: "filter files" ); |
231 | |
232 | g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE); |
233 | g_option_context_parse (context, argc: &argc, argv: &argv, error: &error); |
234 | |
235 | g_option_context_free (context); |
236 | |
237 | if (error != NULL) |
238 | { |
239 | g_printerr (format: "Error parsing commandline options: %s\n" , error->message); |
240 | g_printerr (format: "\n" ); |
241 | g_printerr (format: "Try \"%s --help\" for more information." , |
242 | g_get_prgname ()); |
243 | g_printerr (format: "\n" ); |
244 | g_error_free(error); |
245 | return 1; |
246 | } |
247 | |
248 | if (!locations) |
249 | { |
250 | g_printerr (format: "%s: missing locations" , g_get_prgname ()); |
251 | g_printerr (format: "\n" ); |
252 | g_printerr (format: "Try \"%s --help\" for more information." , |
253 | g_get_prgname ()); |
254 | g_printerr (format: "\n" ); |
255 | return 1; |
256 | } |
257 | |
258 | i = 0; |
259 | |
260 | do |
261 | { |
262 | file = g_file_new_for_commandline_arg (arg: locations[i]); |
263 | cat (file); |
264 | g_object_unref (object: file); |
265 | } |
266 | while (locations[++i] != NULL); |
267 | |
268 | return 0; |
269 | } |
270 | |