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#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <bio.h>
#include <cursor.h>
#include "page.h"
Document*
initfilt(Biobuf *b, int argc, char **argv, uchar *buf, int nbuf, char *type, char *cmd, int docopy)
{
int ofd;
int p[2];
char xbuf[8192];
int n;
char template[] = "/tmp/pagecvtXXXXXXXXX";
if(argc > 1) {
fprint(2, "can only view one %s file at a time\n", type);
return nil;
}
fprint(2, "converting from %s to postscript...\n", type);
if(docopy){
if(pipe(p) < 0){
fprint(2, "pipe fails: %r\n");
threadexits("Epipe");
}
}else{
p[0] = open("/dev/null", ORDWR);
p[1] = open("/dev/null", ORDWR);
}
ofd = opentemp(template, ORDWR|ORCLOSE);
switch(fork()){
case -1:
fprint(2, "fork fails: %r\n");
threadexits("Efork");
default:
close(p[0]);
if(docopy){
write(p[1], buf, nbuf);
if(b)
while((n = Bread(b, xbuf, sizeof xbuf)) > 0)
write(p[1], xbuf, n);
else
while((n = read(stdinfd, xbuf, sizeof xbuf)) > 0)
write(p[1], xbuf, n);
}
close(p[1]);
waitpid();
break;
case 0:
close(p[1]);
dup(p[0], 0);
dup(ofd, 1);
/* stderr shines through */
if(chatty)
fprint(2, "Execing '%s'\n", cmd);
execlp("rc", "rc", "-c", cmd, nil);
break;
}
if(b)
Bterm(b);
seek(ofd, 0, 0);
b = emalloc(sizeof(Biobuf));
Binit(b, ofd, OREAD);
return initps(b, argc, argv, nil, 0);
}
Document*
initdvi(Biobuf *b, int argc, char **argv, uchar *buf, int nbuf)
{
int fd;
char *name;
char cmd[256];
char fdbuf[20];
/*
* Stupid DVIPS won't take standard input.
*/
if(b == nil){ /* standard input; spool to disk (ouch) */
fd = spooltodisk(buf, nbuf, &name);
sprint(fdbuf, "/dev/fd/%d", fd);
b = Bopen(fdbuf, OREAD);
if(b == nil){
fprint(2, "cannot open disk spool file\n");
wexits("Bopen temp");
}
argv = &name;
argc = 1;
}
snprint(cmd, sizeof cmd, "dvips -Pps -r0 -q1 -f1 '%s'", argv[0]);
return initfilt(b, argc, argv, buf, nbuf, "dvi", cmd, 0);
}
Document*
inittroff(Biobuf *b, int argc, char **argv, uchar *buf, int nbuf)
{
return initfilt(b, argc, argv, buf, nbuf, "troff", "9 tr2post | 9 psfonts", 1);
}
Document*
initmsdoc(Biobuf *b, int argc, char **argv, uchar *buf, int nbuf)
{
return initfilt(b, argc, argv, buf, nbuf, "microsoft office", "doc2ps", 1);
}
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