1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <thread.h>
5 #include <bio.h>
6 #include <cursor.h>
7 #include "page.h"
8 
9 Document*
10 initfilt(Biobuf *b, int argc, char **argv, uchar *buf, int nbuf, char *type, char *cmd, int docopy)
11 {
12 	int ofd;
13 	int p[2];
14 	char xbuf[8192];
15 	int n;
16 	char template[] = "/tmp/pagecvtXXXXXXXXX";
17 
18 	if(argc > 1) {
19 		fprint(2, "can only view one %s file at a time\n", type);
20 		return nil;
21 	}
22 
23 	fprint(2, "converting from %s to postscript...\n", type);
24 
25 	if(docopy){
26 		if(pipe(p) < 0){
27 			fprint(2, "pipe fails: %r\n");
28 			threadexits("Epipe");
29 		}
30 	}else{
31 		p[0] = open("/dev/null", ORDWR);
32 		p[1] = open("/dev/null", ORDWR);
33 	}
34 
35 	ofd = opentemp(template, ORDWR|ORCLOSE);
36 	switch(fork()){
37 	case -1:
38 		fprint(2, "fork fails: %r\n");
39 		threadexits("Efork");
40 	default:
41 		close(p[0]);
42 		if(docopy){
43 			write(p[1], buf, nbuf);
44 			if(b)
45 				while((n = Bread(b, xbuf, sizeof xbuf)) > 0)
46 					write(p[1], xbuf, n);
47 			else
48 				while((n = read(stdinfd, xbuf, sizeof xbuf)) > 0)
49 					write(p[1], xbuf, n);
50 		}
51 		close(p[1]);
52 		waitpid();
53 		break;
54 	case 0:
55 		close(p[1]);
56 		dup(p[0], 0);
57 		dup(ofd, 1);
58 		/* stderr shines through */
59 		if(chatty)
60 			fprint(2, "Execing '%s'\n", cmd);
61 		execlp("rc", "rc", "-c", cmd, nil);
62 		break;
63 	}
64 
65 	if(b)
66 		Bterm(b);
67 	seek(ofd, 0, 0);
68 	b = emalloc(sizeof(Biobuf));
69 	Binit(b, ofd, OREAD);
70 
71 	return initps(b, argc, argv, nil, 0);
72 }
73 
74 Document*
75 initdvi(Biobuf *b, int argc, char **argv, uchar *buf, int nbuf)
76 {
77 	int fd;
78 	char *name;
79 	char cmd[256];
80 	char fdbuf[20];
81 
82 	/*
83 	 * Stupid DVIPS won't take standard input.
84 	 */
85 	if(b == nil){	/* standard input; spool to disk (ouch) */
86 		fd = spooltodisk(buf, nbuf, &name);
87 		sprint(fdbuf, "/dev/fd/%d", fd);
88 		b = Bopen(fdbuf, OREAD);
89 		if(b == nil){
90 			fprint(2, "cannot open disk spool file\n");
91 			wexits("Bopen temp");
92 		}
93 		argv = &name;
94 		argc = 1;
95 	}
96 
97 	snprint(cmd, sizeof cmd, "dvips -Pps -r0 -q1 -f1 '%s'", argv[0]);
98 	return initfilt(b, argc, argv, buf, nbuf, "dvi", cmd, 0);
99 }
100 
101 Document*
102 inittroff(Biobuf *b, int argc, char **argv, uchar *buf, int nbuf)
103 {
104 	return initfilt(b, argc, argv, buf, nbuf, "troff", "9 tr2post | 9 psfonts", 1);
105 }
106 
107 Document*
108 initmsdoc(Biobuf *b, int argc, char **argv, uchar *buf, int nbuf)
109 {
110 	return initfilt(b, argc, argv, buf, nbuf, "microsoft office", "doc2ps", 1);
111 }