| 1 | /* |
| 2 | * Convert old to new archive format |
| 3 | */ |
| 4 | |
| 5 | #include <signal.h> |
| 6 | #include <ar.h> |
| 7 | |
| 8 | #define omag 0177555 |
| 9 | |
| 10 | struct ar_hdr nh; |
| 11 | struct |
| 12 | { |
| 13 | char oname[8]; |
| 14 | long odate; |
| 15 | char ouid; |
| 16 | char omode; |
| 17 | unsigned siz; |
| 18 | } oh; |
| 19 | |
| 20 | char *tmp; |
| 21 | char *mktemp(); |
| 22 | int f; |
| 23 | int tf; |
| 24 | union { |
| 25 | char buf[512]; |
| 26 | int magic; |
| 27 | } b; |
| 28 | |
| 29 | main(argc, argv) |
| 30 | char *argv[]; |
| 31 | { |
| 32 | register i; |
| 33 | |
| 34 | tmp = mktemp("/tmp/arcXXXXX"); |
| 35 | for(i=1; i<4; i++) |
| 36 | signal(i, SIG_IGN); |
| 37 | for(i=1; i<argc; i++) |
| 38 | conv(argv[i]); |
| 39 | unlink(tmp); |
| 40 | } |
| 41 | |
| 42 | conv(fil) |
| 43 | char *fil; |
| 44 | { |
| 45 | register unsigned i, n; |
| 46 | |
| 47 | f = open(fil, 2); |
| 48 | if(f < 0) { |
| 49 | printf("arcv: cannot open %s\n", fil); |
| 50 | return; |
| 51 | } |
| 52 | close(creat(tmp, 0600)); |
| 53 | tf = open(tmp, 2); |
| 54 | if(tf < 0) { |
| 55 | printf("arcv: cannot open temp\n"); |
| 56 | close(f); |
| 57 | return; |
| 58 | } |
| 59 | b.magic = 0; |
| 60 | read(f, (char *)&b.magic, sizeof(b.magic)); |
| 61 | if(b.magic != omag) { |
| 62 | printf("arcv: %s not archive format\n", fil); |
| 63 | close(tf); |
| 64 | close(f); |
| 65 | return; |
| 66 | } |
| 67 | b.magic = ARMAG; |
| 68 | write(tf, (char *)&b.magic, sizeof(b.magic)); |
| 69 | loop: |
| 70 | i = read(f, (char *)&oh, sizeof(oh)); |
| 71 | if(i != sizeof(oh)) |
| 72 | goto out; |
| 73 | for(i=0; i<8; i++) |
| 74 | nh.ar_name[i] = oh.oname[i]; |
| 75 | nh.ar_size = oh.siz; |
| 76 | nh.ar_uid = oh.ouid; |
| 77 | nh.ar_gid = 1; |
| 78 | nh.ar_mode = 0666; |
| 79 | nh.ar_date = oh.odate; |
| 80 | n = (oh.siz+1) & ~01; |
| 81 | write(tf, (char *)&nh, sizeof(nh)); |
| 82 | while(n > 0) { |
| 83 | i = 512; |
| 84 | if(n < i) |
| 85 | i = n; |
| 86 | read(f, b.buf, i); |
| 87 | write(tf, b.buf, i); |
| 88 | n -= i; |
| 89 | } |
| 90 | goto loop; |
| 91 | out: |
| 92 | lseek(f, 0L, 0); |
| 93 | lseek(tf, 0L, 0); |
| 94 | while((i=read(tf, b.buf, 512)) > 0) |
| 95 | write(f, b.buf, i); |
| 96 | close(f); |
| 97 | close(tf); |
| 98 | } |