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#include <u.h>
#include <libc.h>
#include <../boot/boot.h>
void
fatal(char *s)
{
char buf[ERRMAX];
buf[0] = '\0';
errstr(buf, sizeof buf);
fprint(2, "boot: %s: %s\n", s, buf);
exits(0);
}
int
readfile(char *name, char *buf, int len)
{
int f, n;
buf[0] = 0;
f = open(name, OREAD);
if(f < 0)
return -1;
n = read(f, buf, len-1);
if(n >= 0)
buf[n] = 0;
close(f);
return 0;
}
void
run(char *file, ...)
{
char buf[64];
Waitmsg *w;
int pid;
switch(pid = fork()){
case -1:
fatal("fork");
case 0:
exec(file, &file);
snprint(buf, sizeof buf, "can't exec %s", file);
fatal(buf);
default:
while((w = wait()) != nil)
if(w->pid == pid)
break;
if(w == nil){
snprint(buf, sizeof buf, "wait returned nil running %s", file);
free(w);
fatal(buf);
}
free(w);
}
}
int
writefile(char *name, char *buf, int len)
{
int f, n;
f = open(name, OWRITE);
if(f < 0)
return -1;
n = write(f, buf, len);
close(f);
return (n != len) ? -1 : 0;
}
void
setenv(char *name, char *val, int ec)
{
int f;
char ename[64];
snprint(ename, sizeof ename, "#e%s/%s", ec ? "c" : "", name);
f = create(ename, 1, 0666);
if(f < 0){
fprint(2, "create %s: %r\n", ename);
return;
}
write(f, val, strlen(val));
close(f);
}
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