date and time created 88/12/12 20:55:11 by kfall

[unix-history] / usr / src / old / awk / freeze.c

#ifndef lint
static char sccsid[] = "@(#)freeze.c    4.2 %G%";
#endif

#include "stdio.h"
freeze(s) char *s;
{       int fd;
       unsigned int *len;
       len = (unsigned int *)sbrk(0);
       if((fd = creat(s, 0666)) < 0) {
               perror(s);
               return(1);
       }
       write(fd, &len, sizeof(len));
       write(fd, (char *)0, len);
       close(fd);
       return(0);
}

thaw(s) char *s;
{       int fd;
       unsigned int *len;
       if(*s == 0) {
               fprintf(stderr, "empty restore file\n");
               return(1);
       }
       if((fd = open(s, 0)) < 0) {
               perror(s);
               return(1);
       }
       read(fd, &len, sizeof(len));
       (void) brk(len);
       read(fd, (char *)0, len);
       close(fd);
       return(0);
}