BSD 4_3 development

[unix-history] / usr / src / games / compat / modshell / v6flag.c

#
/* flag version 6 a.outs by putting a 1 in word 6 */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
struct stat stbuf;
int     fd;
short   hbuf[8];
time_t  timep[2];
main(argc, argv) char *argv[]; {
       if(stat(argv[1], &stbuf) < 0) exit(0);
       if(!(stbuf.st_mode & S_IEXEC)) exit(0);
       if((fd = open(argv[1], 2)) < 0) exit(0);
       if(read(fd, hbuf, sizeof hbuf) != sizeof hbuf) exit(0);
       lseek(fd, 0L, 0);
       if(hbuf[0]!=0407&&hbuf[0]!=0410&&hbuf[0]!=0411&&hbuf[0]!=0405) exit(0);
       if(hbuf[6] != 0) exit(0);
       hbuf[6] = 01;
       if(write(fd, hbuf, sizeof hbuf) != sizeof hbuf) exit(0);
       close(fd);
       timep[0] = stbuf.st_atime;
       timep[1] = stbuf.st_mtime;
       utime(argv[1], timep);
       printf("%s fixed\n",argv[1]);
}