?? su.c
字號:
/* su -- become super-user */char password[100];char pwbuf[100];int ttybuf[3];main(){ register char *p, *q; extern fin; if(getpw(0, pwbuf)) goto badpw; (&fin)[1] = 0; p = pwbuf; while(*p != ':') if(*p++ == '\0') goto badpw; if(*++p == ':') goto ok; gtty(0, ttybuf); ttybuf[2] =& ~010; stty(0, ttybuf); printf("password: "); q = password; while((*q = getchar()) != '\n') if(*q++ == '\0') return; *q = '\0'; ttybuf[2] =| 010; stty(0, ttybuf); printf("\n"); q = crypt(password); while(*q++ == *p++); if(*--q == '\0' && *--p == ':') goto ok; goto error;badpw: printf("bad password file\n");ok: setuid(0); execl("/bin/sh", "-", 0); printf("cannot execute shell\n");error: printf("sorry\n");}
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