1 /* fileconverter.c
2 *
3 * Copyright (C) 2008 Till Kamppeter <till.kamppeter@gmail.com>
4 * Copyright (C) 2008 Lars Uebernickel <larsuebernickel@gmx.de>
5 *
6 * This file is part of foomatic-rip.
7 *
8 * Foomatic-rip is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * Foomatic-rip is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
22 */
23
24 #include <stdlib.h>
25 #include <stdio.h>
26 #include <string.h>
27 #include <signal.h>
28 #include <unistd.h>
29
30 #include "foomaticrip.h"
31 #include "options.h"
32 #include "process.h"
33
34
35 /*
36 * One of these fileconverters is used if the 'textfilter' option in the config file
37 * is not set. (Except if the spooler is CUPS, then 'texttops' is used
38 */
39 const char *fileconverters[][2] = {
40 { "a2ps", "a2ps -1 @@--medium=@@PAGESIZE@@ @@--center-title=@@JOBTITLE@@ -o -" },
41 { "enscript", "enscript -G @@-M @@PAGESIZE@@ @@-b \"Page $%|@@JOBTITLE@@ --margins=36:36:36:36 --mark-wrapped-lines=arrow --word-wrap -p-" },
42 { "mpage", "mpage -o -1 @@-b @@PAGESIZE@@ @@-H -h @@JOBTITLE@@ -m36l36b36t36r -f -P- -" },
43 { NULL, NULL }
44 };
45
46 char fileconverter[PATH_MAX] = "";
47
set_fileconverter(const char * fc)48 void set_fileconverter(const char *fc)
49 {
50 int i;
51 for (i = 0; fileconverters[i][0]; i++) {
52 if (!strcmp(fc, fileconverters[i][0])) {
53 strlcpy(fileconverter, fileconverters[i][1], PATH_MAX);
54 break;
55 }
56 }
57 if (!fileconverters[i][0])
58 strlcpy(fileconverter, fc, PATH_MAX);
59 }
60
guess_fileconverter()61 int guess_fileconverter()
62 {
63 int i;
64 for (i = 0; fileconverters[i][0]; i++) {
65 if (find_in_path(fileconverters[i][0], getenv("PATH"), NULL)) {
66 strlcpy(fileconverter, fileconverters[i][1], PATH_MAX);
67 return 1;
68 }
69 }
70 return 0;
71 }
72
73 /*
74 * Replace @@...@@PAGESIZE@@ and @@...@@JOBTITLE@@ with 'pagesize' and
75 * 'jobtitle' (if they are are not NULL). Returns a newly malloced string.
76 */
fileconverter_from_template(const char * fileconverter,const char * pagesize,const char * jobtitle)77 char * fileconverter_from_template(const char *fileconverter,
78 const char *pagesize, const char *jobtitle)
79 {
80 char *templstart, *templname;
81 const char *last = fileconverter;
82 char *res;
83 size_t len;
84
85 len = strlen(fileconverter) +
86 (pagesize ? strlen(pagesize) : 0) +
87 (jobtitle ? strlen(jobtitle) : 0) +1;
88 res = malloc(len);
89 res[0] = '\0';
90
91 while ((templstart = strstr(last, "@@"))) {
92 strncat(res, last, templstart - last);
93 templstart += 2;
94 templname = strstr(templstart, "@@");
95 if (!templname)
96 break;
97 if (startswith(templname, "@@PAGESIZE@@") && pagesize) {
98 strncat(res, templstart, templname - templstart);
99 strcat(res, pagesize);
100 last = templname + 12;
101 }
102 else if (startswith(templname, "@@JOBTITLE@@") && jobtitle) {
103 strncat(res, templstart, templname - templstart);
104 strcat(res, jobtitle);
105 while (templstart != templname) {
106 if (*templstart == '\"') {
107 strcat(res, "\"");
108 break;
109 }
110 templstart++;
111 }
112 last = templname + 12;
113 }
114 else
115 last += strlen(res);
116 }
117 strlcat(res, last, len);
118
119 return res;
120 }
121
exec_kid2(FILE * in,FILE * out,void * user_arg)122 int exec_kid2(FILE *in, FILE *out, void *user_arg)
123 {
124 int n;
125 const char *alreadyread = (const char *)user_arg;
126 char tmp[1024];
127
128 /* child, first part of the pipe, reading in the data from standard input
129 * and stuffing it into the file converter after putting in the already
130 * read data (in alreadyread) */
131
132 _log("kid2: writing alreadyread\n");
133
134 /* At first pass the data which we already read to the filter */
135 fwrite(alreadyread, 1, strlen(alreadyread), out);
136
137 _log("kid2: Then read the rest from standard input\n");
138 /* Then read the rest from standard input */
139 while ((n = fread(tmp, 1, 1024, stdin)) > 0)
140 fwrite(tmp, 1, n, out);
141
142 _log("kid2: Close out and stdin\n");
143 fclose(out);
144 fclose(stdin);
145
146 _log("kid2 finished\n");
147 return EXIT_PRINTED;
148 }
149
150 typedef struct {
151 const char *fileconv;
152 const char *alreadyread;
153 } kid1_userdata_t;
154
exec_kid1(FILE * in,FILE * out,void * user_arg)155 int exec_kid1(FILE *in, FILE *out, void *user_arg)
156 {
157 int kid2;
158 FILE *kid2out;
159 int status;
160 const char *fileconv = ((kid1_userdata_t *)user_arg)->fileconv;
161 const char *alreadyread = ((kid1_userdata_t *)user_arg)->alreadyread;
162
163 kid2 = start_process("kid2", exec_kid2, (void *)alreadyread, NULL, &kid2out);
164 if (kid2 < 0)
165 return EXIT_PRNERR_NORETRY_BAD_SETTINGS;
166
167 if (spooler != SPOOLER_CUPS)
168 _log("file converter command: %s\n", fileconv);
169
170 if (dup2(fileno(kid2out), fileno(stdin)) < 0) {
171 _log("kid1: Could not dup stdin\n");
172 fclose(kid2out);
173 return EXIT_PRNERR_NORETRY_BAD_SETTINGS;
174 }
175 if (dup2(fileno(out), fileno(stdout)) < 0) {
176 _log("kid1: Could not dup stdout\n");
177 fclose(kid2out);
178 return EXIT_PRNERR_NORETRY_BAD_SETTINGS;
179 }
180 if (debug && !redirect_log_to_stderr()) {
181 _log("Could not dup logh to stderr\n");
182 fclose(kid2out);
183 return EXIT_PRNERR_NORETRY_BAD_SETTINGS;
184 }
185
186 /* Actually run the thing... */
187 status = run_system_process("fileconverter", fileconv);
188 fclose(out);
189 fclose(kid2out);
190 fclose(stdin);
191 fclose(stdout);
192
193 if (WIFEXITED(status)) {
194 if (WEXITSTATUS(status) == 0) {
195 wait_for_process(kid2);
196 _log("kid1 finished\n");
197 return EXIT_PRINTED;
198 }
199 }
200 else if (WIFSIGNALED(status)) {
201 switch (WTERMSIG(status)) {
202 case SIGUSR1: return EXIT_PRNERR;
203 case SIGUSR2: return EXIT_PRNERR_NORETRY;
204 case SIGTTIN: return EXIT_ENGAGED;
205 }
206 }
207 return EXIT_PRNERR;
208 }
209
210
211 /*
212 * This function is only used when the input data is not PostScript. Then it
213 * runs a filter which converts non-PostScript files into PostScript. The user
214 * can choose which filter he wants to use. The filter command line is
215 * provided by 'fileconverter'.
216 */
get_fileconverter_handle(const char * alreadyread,FILE ** fd,pid_t * pid)217 void get_fileconverter_handle(const char *alreadyread, FILE **fd, pid_t *pid)
218 {
219 pid_t kid1;
220 FILE *kid1out;
221 const char *pagesize;
222 char *fileconv;
223 kid1_userdata_t kid1_userdata;
224
225 _log("\nStarting converter for non-PostScript files\n");
226
227 if (isempty(fileconverter) && !guess_fileconverter())
228 rip_die(EXIT_PRNERR_NORETRY_BAD_SETTINGS, "Cannot convert file to "
229 "Postscript (missing fileconverter).");
230
231 /* Use wider margins so that the pages come out completely on every printer
232 * model (especially HP inkjets) */
233 pagesize = option_get_value(find_option("PageSize"), optionset("header"));
234 if (pagesize && startswith(fileconverter, "a2ps")) {
235 if (!strcasecmp(pagesize, "letter"))
236 pagesize = "Letterdj";
237 else if (!strcasecmp(pagesize, "a4"))
238 pagesize = "A4dj";
239 }
240
241 if (do_docs)
242 snprintf(get_current_job()->title, 128, "Documentation for the %s", printer_model);
243
244 fileconv = fileconverter_from_template(fileconverter, pagesize, get_current_job()->title);
245
246 kid1_userdata.fileconv = fileconv;
247 kid1_userdata.alreadyread = alreadyread;
248 kid1 = start_process("kid1", exec_kid1, &kid1_userdata, NULL, &kid1out);
249 if (kid1 < 0)
250 rip_die(EXIT_PRNERR_NORETRY_BAD_SETTINGS, "Cannot convert file to "
251 "Postscript (Cannot fork for kid1!)\n");
252
253 *fd = kid1out;
254 *pid = kid1;
255
256 free(fileconv);
257 }
258
close_fileconverter_handle(FILE * fileconverter_handle,pid_t fileconverter_pid)259 int close_fileconverter_handle(FILE *fileconverter_handle, pid_t fileconverter_pid)
260 {
261 int status;
262
263 _log("\nClosing file converter\n");
264 fclose(fileconverter_handle);
265
266 status = wait_for_process(fileconverter_pid);
267 if (WIFEXITED(status))
268 return WEXITSTATUS(status);
269 else
270 return EXIT_PRNERR_NORETRY_BAD_SETTINGS;
271 }
272
273