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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"
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;
}
/*
* 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;
strcpy(tempfile, "/tmp/pagespoolXXXXXXXXX");
fd = opentemp(tempfile, ORDWR);
if(name)
*name = estrdup(tempfile);
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;
}
typedef struct StdinArg StdinArg;
struct StdinArg {
Channel *cp;
uchar *ibuf;
int in;
};
/*
* spool standard input into a pipe.
* we've already ready the first in bytes into ibuf
*/
static void
_stdinpipe(void *a)
{
uchar buf[8192];
StdinArg *arg;
int p[2];
int n;
arg = a;
if(pipe(p) < 0){
fprint(2, "pipe fails: %r\n");
wexits("pipe");
}
send(arg->cp, &p[0]);
write(p[1], arg->ibuf, arg->in);
while((n = read(stdinfd, buf, sizeof buf)) > 0)
write(p[1], buf, n);
close(p[1]);
threadexits(0);
}
int
stdinpipe(uchar *ibuf, int in) {
StdinArg arg;
int fd;
arg.ibuf = ibuf;
arg.in = in;
arg.cp = chancreate(sizeof(int), 0);
proccreate(_stdinpipe, &arg, mainstacksize);
recv(arg.cp, &fd);
chanfree(arg.cp);
return fd;
}
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