| 1 | #include <a.out.h> |
| 2 | #include <signal.h> |
| 3 | |
| 4 | char *tname; |
| 5 | char *mktemp(); |
| 6 | struct exec head; |
| 7 | int a_magic[] = {A_MAGIC1, A_MAGIC2, A_MAGIC3, A_MAGIC4, 0}; |
| 8 | int status; |
| 9 | int tf; |
| 10 | |
| 11 | main(argc, argv) |
| 12 | char *argv[]; |
| 13 | { |
| 14 | register i; |
| 15 | |
| 16 | signal(SIGHUP, SIG_IGN); |
| 17 | signal(SIGINT, SIG_IGN); |
| 18 | signal(SIGQUIT, SIG_IGN); |
| 19 | tname = mktemp("/tmp/sXXXXX"); |
| 20 | close(creat(tname, 0600)); |
| 21 | tf = open(tname, 2); |
| 22 | if(tf < 0) { |
| 23 | printf("cannot create temp file\n"); |
| 24 | exit(2); |
| 25 | } |
| 26 | for(i=1; i<argc; i++) { |
| 27 | strip(argv[i]); |
| 28 | if(status > 1) |
| 29 | break; |
| 30 | } |
| 31 | close(tf); |
| 32 | unlink(tname); |
| 33 | exit(status); |
| 34 | } |
| 35 | |
| 36 | strip(name) |
| 37 | char *name; |
| 38 | { |
| 39 | register f; |
| 40 | long size; |
| 41 | int i; |
| 42 | |
| 43 | f = open(name, 0); |
| 44 | if(f < 0) { |
| 45 | printf("cannot open %s\n", name); |
| 46 | status = 1; |
| 47 | goto out; |
| 48 | } |
| 49 | read(f, (char *)&head, sizeof(head)); |
| 50 | for(i=0;a_magic[i];i++) |
| 51 | if(a_magic[i] == head.a_magic) break; |
| 52 | if(a_magic[i] == 0) { |
| 53 | printf("%s not in a.out format\n", name); |
| 54 | status = 1; |
| 55 | goto out; |
| 56 | } |
| 57 | if(head.a_syms == 0 && (head.a_flag&1) != 0) { |
| 58 | printf("%s already stripped\n", name); |
| 59 | goto out; |
| 60 | } |
| 61 | size = (long)head.a_text + head.a_data; |
| 62 | head.a_syms = 0; |
| 63 | head.a_flag |= 1; |
| 64 | |
| 65 | lseek(tf, (long)0, 0); |
| 66 | write(tf, (char *)&head, sizeof(head)); |
| 67 | if(copy(name, f, tf, size)) { |
| 68 | status = 1; |
| 69 | goto out; |
| 70 | } |
| 71 | size += sizeof(head); |
| 72 | close(f); |
| 73 | f = creat(name, 0666); |
| 74 | if(f < 0) { |
| 75 | printf("%s cannot recreate\n", name); |
| 76 | status = 1; |
| 77 | goto out; |
| 78 | } |
| 79 | lseek(tf, (long)0, 0); |
| 80 | if(copy(name, tf, f, size)) |
| 81 | status = 2; |
| 82 | |
| 83 | out: |
| 84 | close(f); |
| 85 | } |
| 86 | |
| 87 | copy(name, fr, to, size) |
| 88 | char *name; |
| 89 | long size; |
| 90 | { |
| 91 | register s, n; |
| 92 | char buf[512]; |
| 93 | |
| 94 | while(size != 0) { |
| 95 | s = 512; |
| 96 | if(size < 512) |
| 97 | s = size; |
| 98 | n = read(fr, buf, s); |
| 99 | if(n != s) { |
| 100 | printf("%s unexpected eof\n", name); |
| 101 | return(1); |
| 102 | } |
| 103 | n = write(to, buf, s); |
| 104 | if(n != s) { |
| 105 | printf("%s unexpected write eof\n", name); |
| 106 | return(1); |
| 107 | } |
| 108 | size -= s; |
| 109 | } |
| 110 | return(0); |
| 111 | } |