trequest.c - plan9port - [fork] Plan 9 from user space
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trequest.c (3930B)
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1 /*
2 *
3 * Things used to handle special requests (eg. manual feed) globally or on a per
4 * page basis. Requests are passed through to the translator using the -R option.
5 * The argument to -R can be "request", "request:page", or "request:page:file".
6 * If page is omitted (as in the first form) or set to 0 request will be applied
7 * to the global environment. In all other cases it applies only to the selected
8 * page. If a file is given, page must be supplied, and the lookup is in that file
9 * rather than *requestfile.
10 *
11 */
12
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <string.h>
16 #include <unistd.h>
17
18 #include "gen.h" /* general purpose definitions */
19 #include "ext.h"
20 #include "request.h" /* a few special definitions */
21 #include "path.h" /* for the default request file */
22
23 Request request[MAXREQUEST]; /* next page or global request */
24 int nextreq = 0; /* goes in request[nextreq] */
25 char *requestfile = REQUESTFILE; /* default lookup file */
26
27 void dumprequest(char *want, char *file, FILE *fp_out);
28 extern void error(int errtype, char *fmt, ...);
29
30 /*****************************************************************************/
31
32 void
33 saverequest(want)
34
35 char *want; /* grab code for this stuff */
36
37 {
38
39 char *page; /* and save it for this page */
40 char *strtok();
41
42 /*
43 *
44 * Save the request until we get to appropriate page - don't even bother with
45 * the lookup right now. Format of *want string is "request", "request:page", or
46 * "request:page:file", and we assume we can change the string here as needed.
47 * If page is omitted or given as 0 the request will be done globally. If *want
48 * includes a file, request and page must also be given, and in that case *file
49 * will be used for the lookup.
50 *
51 */
52
53 if ( nextreq < MAXREQUEST ) {
54 request[nextreq].want = strtok(want, ": ");
55 if ( (page = strtok(NULL, ": ")) == NULL )
56 request[nextreq].page = 0;
57 else request[nextreq].page = atoi(page);
58 if ( (request[nextreq].file = strtok(NULL, ": ")) == NULL )
59 request[nextreq].file = requestfile;
60 nextreq++;
61 } else error(NON_FATAL, "too many requests - ignoring %s", want);
62
63 } /* End of saverequest */
64
65 /*****************************************************************************/
66 extern void dumprequest();
67
68 void
69 writerequest(page, fp_out)
70
71 int page; /* write everything for this page */
72 FILE *fp_out; /* to this file */
73
74 {
75
76 int i; /* loop index */
77
78 /*
79 *
80 * Writes out all the requests that have been saved for page. Page 0 refers to
81 * the global environment and is done during initial setup.
82 *
83 */
84
85 for ( i = 0; i < nextreq; i++ )
86 if ( request[i].page == page )
87 dumprequest(request[i].want, request[i].file, fp_out);
88
89 } /* End of writerequest */
90
91 /*****************************************************************************/
92
93 void
94 dumprequest(want, file, fp_out)
95
96 char *want; /* look for this string */
97 char *file; /* in this file */
98 FILE *fp_out; /* and write the value out here */
99
100 {
101
102 char buf[100]; /* line buffer for reading *file */
103 FILE *fp_in;
104
105 /*
106 *
107 * Looks for *want in the request file and if it's found the associated value
108 * is copied to the output file. Keywords (ie. the *want strings) begin an @ in
109 * the first column of file, while the values (ie. the stuff that's copied to
110 * the output file) starts on the next line and extends to the next keyword or
111 * to the end of file.
112 *
113 */
114
115 if ( (fp_in = fopen(file, "r")) != NULL ) {
116 while ( fgets(buf, sizeof(buf), fp_in) != NULL )
117 if ( buf[0] == '@' && strncmp(want, &buf[1], strlen(want)) == 0 )
118 while ( fgets(buf, sizeof(buf), fp_in) != NULL )
119 if ( buf[0] == '#' || buf[0] == '%' )
120 continue;
121 else if ( buf[0] != '@' )
122 fprintf(fp_out, "%s", buf);
123 else break;
124 fclose(fp_in);
125 } /* End if */
126
127 } /* End of dumprequest */
128
129 /*****************************************************************************/