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#include <u.h>
#include <libc.h>
#include <draw.h>
#include <event.h>
#include <bio.h>
#include "page.h"
void*
emalloc(int sz)
{
void *v;
v = malloc(sz);
if(v == nil) {
fprint(2, "out of memory allocating %d\n", sz);
wexits("mem");
}
memset(v, 0, sz);
return v;
}
void*
erealloc(void *v, int sz)
{
v = realloc(v, sz);
if(v == nil) {
fprint(2, "out of memory allocating %d\n", sz);
wexits("mem");
}
return v;
}
char*
estrdup(char *s)
{
char *t;
if((t = strdup(s)) == nil) {
fprint(2, "out of memory in strdup(%.10s)\n", s);
wexits("mem");
}
return t;
}
int
opentemp(char *template)
{
int fd, i;
char *p;
p = estrdup(template);
fd = -1;
for(i=0; i<10; i++){
mktemp(p);
if(access(p, 0) < 0 && (fd=create(p, ORDWR|ORCLOSE, 0400)) >= 0)
break;
strcpy(p, template);
}
if(fd < 0){
fprint(2, "couldn't make temporary file\n");
wexits("Ecreat");
}
strcpy(template, p);
free(p);
return fd;
}
/*
* spool standard input to /tmp.
* we've already read the initial in bytes into ibuf.
*/
int
spooltodisk(uchar *ibuf, int in, char **name)
{
uchar buf[8192];
int fd, n;
char temp[40];
strcpy(temp, "/tmp/pagespoolXXXXXXXXX");
fd = opentemp(temp);
if(name)
*name = estrdup(temp);
if(write(fd, ibuf, in) != in){
fprint(2, "error writing temporary file\n");
wexits("write temp");
}
while((n = read(stdinfd, buf, sizeof buf)) > 0){
if(write(fd, buf, n) != n){
fprint(2, "error writing temporary file\n");
wexits("write temp0");
}
}
seek(fd, 0, 0);
return fd;
}
/*
* spool standard input into a pipe.
* we've already ready the first in bytes into ibuf
*/
int
stdinpipe(uchar *ibuf, int in)
{
uchar buf[8192];
int n;
int p[2];
if(pipe(p) < 0){
fprint(2, "pipe fails: %r\n");
wexits("pipe");
}
switch(rfork(RFPROC|RFFDG)){
case -1:
fprint(2, "fork fails: %r\n");
wexits("fork");
default:
close(p[1]);
return p[0];
case 0:
break;
}
close(p[0]);
write(p[1], ibuf, in);
while((n = read(stdinfd, buf, sizeof buf)) > 0)
write(p[1], buf, n);
_exits(0);
return -1; /* not reached */
}
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