prt_dos.c - enscript - GNU Enscript
(HTM) git clone git://thinkerwim.org/enscript.git
(DIR) Log
(DIR) Files
(DIR) Refs
(DIR) README
(DIR) LICENSE
---
prt_dos.c (3361B)
---
1 /*
2 * Printer interface for DOS.
3 * Copyright (c) 1996-2001 Markku Rossi.
4 *
5 * Author: Markku Rossi <mtr@iki.fi>
6 */
7
8 /*
9 * This file is part of GNU Enscript.
10 *
11 * Enscript is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * Enscript is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with Enscript. If not, see <http://www.gnu.org/licenses/>.
23 */
24
25 #include "gsint.h"
26
27 /************************** Types and definitions ***************************/
28
29 struct PrinterCtxRec
30 {
31 /* Output stream. */
32 FILE *fp;
33
34 /* If using temporary file, this is its name. */
35 char tmpfile[512];
36
37 /* Command to spool the temporary output. This is NULL if we
38 already spooled the output to `fp' and there is no
39 post-processing to do. */
40 Buffer *command;
41 };
42
43 typedef struct PrinterCtxRec PrinterCtxStruct;
44 typedef struct PrinterCtxRec *PrinterCtx;
45
46
47 /***************************** Global functions *****************************/
48
49 FILE *
50 printer_open(char *cmd, char *options, char *queue_param, char *printer_name,
51 void **context_return)
52 {
53 PrinterCtx ctx;
54
55 ctx = xcalloc(1, sizeof(*ctx));
56
57 if (cmd && cmd[0])
58 {
59 if (tmpnam(ctx->tmpfile) == NULL)
60 FATAL((stderr, _("could not create temporary spool file name: %s"),
61 strerror(errno)));
62
63 /* Spool output to a temporary file and spool with with command
64 when the printer is closed. */
65
66 ctx->command = buffer_alloc();
67
68 buffer_append(ctx->command, cmd);
69 buffer_append(ctx->command, " ");
70
71 if (options)
72 {
73 buffer_append(ctx->command, options);
74 buffer_append(ctx->command, " ");
75 }
76
77 if (printer_name)
78 {
79 buffer_append(ctx->command, queue_param);
80 buffer_append(ctx->command, printer_name);
81 buffer_append(ctx->command, " ");
82 }
83
84 buffer_append(ctx->command, ctx->tmpfile);
85
86 /* Open the temporary spool file. */
87 ctx->fp = fopen(ctx->tmpfile, "wb");
88 if (ctx->fp == NULL)
89 FATAL((stderr, _("Could not open temporary spool file `%s': %s"),
90 ctx->tmpfile, strerror(errno)));
91 }
92 else
93 {
94 /* Just open file pointer to the printer. */
95 ctx->fp = fopen(printer_name, "wb");
96 if (ctx->fp == NULL)
97 FATAL((stderr, _("Could not open printer `%s': %s"), printer_name,
98 strerror(errno)));
99 }
100
101 *context_return = ctx;
102
103 return ctx->fp;
104 }
105
106
107 void
108 printer_close(void *context)
109 {
110 PrinterCtx ctx = (PrinterCtx) context;
111
112 /* Close the output stream. */
113 fclose(ctx->fp);
114
115 /* Do we need to do post-processing (read spooling). */
116 if (ctx->command)
117 {
118 /* Yes. */
119 if (system(buffer_ptr(ctx->command)) == -1)
120 FATAL((stderr, _("Could not spool temporary output `%s': %s"),
121 ctx->tmpfile, strerror(errno)));
122
123 /* We do not need the spool command anymore. */
124 buffer_free(ctx->command);
125
126 /* Unlink the temporary output file. */
127 (void) remove(ctx->tmpfile);
128 }
129
130 /* Free context. */
131 xfree(ctx);
132 }