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