Files
seta75D 2e8a93c394 Init
2021-10-11 18:20:23 -03:00

37 lines
621 B
C

#ifndef lint
static char sccsid[] = "@(#)freeze.c 1.1 92/07/30 SMI"; /* from S5R2 */
#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);
}