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#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <event.h>
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#include <bio.h>
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#include "page.h"
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void*
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emalloc(int sz)
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{
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	void *v;
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	v = malloc(sz);
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	if(v == nil) {
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		fprint(2, "out of memory allocating %d\n", sz);
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		wexits("mem");
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	}
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	memset(v, 0, sz);
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	return v;
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}
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void*
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erealloc(void *v, int sz)
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{
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	v = realloc(v, sz);
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	if(v == nil) {
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		fprint(2, "out of memory allocating %d\n", sz);
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		wexits("mem");
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	}
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	return v;
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}
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char*
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estrdup(char *s)
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{
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	char *t;
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	if((t = strdup(s)) == nil) {
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		fprint(2, "out of memory in strdup(%.10s)\n", s);
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		wexits("mem");
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	}
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	return t;
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}
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int
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opentemp(char *template)
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{
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	int fd, i;
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	char *p;
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	p = estrdup(template);
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	fd = -1;
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	for(i=0; i<10; i++){
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		mktemp(p);
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		if(access(p, 0) < 0 && (fd=create(p, ORDWR|ORCLOSE, 0400)) >= 0)
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			break;
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		strcpy(p, template);
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	}
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	if(fd < 0){
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		fprint(2, "couldn't make temporary file\n");
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		wexits("Ecreat");
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	}
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	strcpy(template, p);
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	free(p);
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	return fd;
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}
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/*
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 * spool standard input to /tmp.
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 * we've already read the initial in bytes into ibuf.
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 */
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int
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spooltodisk(uchar *ibuf, int in, char **name)
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{
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	uchar buf[8192];
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	int fd, n;
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	char temp[40];
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	strcpy(temp, "/tmp/pagespoolXXXXXXXXX");
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	fd = opentemp(temp);
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	if(name)
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		*name = estrdup(temp);
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	if(write(fd, ibuf, in) != in){
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		fprint(2, "error writing temporary file\n");
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		wexits("write temp");
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	}
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	while((n = read(stdinfd, buf, sizeof buf)) > 0){
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		if(write(fd, buf, n) != n){
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			fprint(2, "error writing temporary file\n");
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			wexits("write temp0");
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		}
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	}
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	seek(fd, 0, 0);
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	return fd;
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}
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/*
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 * spool standard input into a pipe.
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 * we've already ready the first in bytes into ibuf
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 */
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int
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stdinpipe(uchar *ibuf, int in)
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{
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	uchar buf[8192];
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	int n;
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	int p[2];
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	if(pipe(p) < 0){
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		fprint(2, "pipe fails: %r\n");
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		wexits("pipe");
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	}
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	switch(rfork(RFMEM|RFPROC|RFFDG)){
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	case -1:
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		fprint(2, "fork fails: %r\n");
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		wexits("fork");
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	default:
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		close(p[1]);
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		return p[0];
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	case 0:
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		break;
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	}
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	close(p[0]);
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	write(p[1], ibuf, in);
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	while((n = read(stdinfd, buf, sizeof buf)) > 0)
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		write(p[1], buf, n);
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129 
	_exits(0);
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	return -1;	/* not reached */
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}
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/* try to update the label, but don't fail on any errors */
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void
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setlabel(char *label)
136 
{
137 
	char *s;
138 
	int fd;
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140 
	s = smprint("%s/label", display->windir);
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	if (s == nil)
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		return;
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	fd = open(s, OWRITE);
144 
	free(s);
145 
	if(fd >= 0){
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		write(fd, label, strlen(label));
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		close(fd);
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	}
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	werrstr("");
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}