1 static char *sccsid = "@(#)strip.c 4.2 (Berkeley) 03/31/82"; 2 #include <a.out.h> 3 #include <signal.h> 4 #include <pagsiz.h> 5 6 #define BUFSIZ 1024 7 8 char *tname; 9 char *mktemp(); 10 struct exec head; 11 int status; 12 int tf; 13 14 main(argc, argv) 15 char *argv[]; 16 { 17 register i; 18 19 signal(SIGHUP, SIG_IGN); 20 signal(SIGINT, SIG_IGN); 21 signal(SIGQUIT, SIG_IGN); 22 tname = mktemp("/tmp/sXXXXX"); 23 close(creat(tname, 0600)); 24 tf = open(tname, 2); 25 if(tf < 0) { 26 printf("cannot create temp file\n"); 27 exit(2); 28 } 29 for(i=1; i<argc; i++) { 30 strip(argv[i]); 31 if(status > 1) 32 break; 33 } 34 close(tf); 35 unlink(tname); 36 exit(status); 37 } 38 39 strip(name) 40 char *name; 41 { 42 register f; 43 long size; 44 int i; 45 46 f = open(name, 0); 47 if(f < 0) { 48 printf("cannot open %s\n", name); 49 status = 1; 50 goto out; 51 } 52 read(f, (char *)&head, sizeof(head)); 53 if (N_BADMAG(head)) { 54 printf("%s not in a.out format\n", name); 55 status = 1; 56 goto out; 57 } 58 if ((head.a_syms == 0) && (head.a_trsize == 0) && (head.a_drsize ==0)) { 59 printf("%s already stripped\n", name); 60 goto out; 61 } 62 size = (long)head.a_text + head.a_data; 63 head.a_syms = head.a_trsize = head.a_drsize = 0 ; 64 lseek(tf, (long)0, 0); 65 write(tf, (char *)&head, sizeof(head)); 66 if (head.a_magic == ZMAGIC) 67 size += PAGSIZ - sizeof (head); 68 if (copy(name, f, tf, size)) { 69 status = 1; 70 goto out; 71 } 72 size += sizeof(head); 73 close(f); 74 f = creat(name, 0666); 75 if(f < 0) { 76 printf("%s cannot recreate\n", name); 77 status = 1; 78 goto out; 79 } 80 lseek(tf, (long)0, 0); 81 if(copy(name, tf, f, size)) 82 status = 2; 83 84 out: 85 close(f); 86 } 87 88 copy(name, fr, to, size) 89 char *name; 90 long size; 91 { 92 register s, n; 93 char buf[BUFSIZ]; 94 95 while(size != 0) { 96 s = BUFSIZ; 97 if(size < BUFSIZ) 98 s = size; 99 n = read(fr, buf, s); 100 if(n != s) { 101 printf("%s unexpected eof\n", name); 102 return(1); 103 } 104 n = write(to, buf, s); 105 if(n != s) { 106 printf("%s unexpected write eof\n", name); 107 return(1); 108 } 109 size -= s; 110 } 111 return(0); 112 } 113