| 1 | #include <ar.h> |
| 2 | #include <a.out.h> |
| 3 | #include <stdio.h> |
| 4 | #define MAGIC exp.a_magic |
| 5 | #define BADMAG MAGIC!=A_MAGIC1 && MAGIC!=A_MAGIC2 \ |
| 6 | && MAGIC!=A_MAGIC3 && MAGIC!=A_MAGIC4 |
| 7 | struct ar_hdr arp; |
| 8 | struct exec exp; |
| 9 | FILE *fi, *fo; |
| 10 | long off, oldoff; |
| 11 | long ftell(); |
| 12 | #define TABSZ 700 |
| 13 | struct tab |
| 14 | { char cname[8]; |
| 15 | long cloc; |
| 16 | } tab[TABSZ]; |
| 17 | int tnum; |
| 18 | int new; |
| 19 | char tempnm[] = "__.SYMDEF"; |
| 20 | char firstname[17]; |
| 21 | long offdelta; |
| 22 | |
| 23 | main(argc, argv) |
| 24 | char **argv; |
| 25 | { |
| 26 | char buf[256]; |
| 27 | |
| 28 | --argc; |
| 29 | while(argc--) { |
| 30 | fi = fopen(*++argv,"r"); |
| 31 | if (fi == NULL) { |
| 32 | fprintf(stderr, "nm: cannot open %s\n", *argv); |
| 33 | continue; |
| 34 | } |
| 35 | off = sizeof(exp.a_magic); |
| 36 | fread((char *)&exp, 1, sizeof(MAGIC), fi); /* get magic no. */ |
| 37 | if (MAGIC != ARMAG) |
| 38 | { fprintf(stderr, "not archive: %s\n", *argv); |
| 39 | continue; |
| 40 | } |
| 41 | fseek(fi, 0L, 0); |
| 42 | new = tnum = 0; |
| 43 | if(nextel(fi) == 0) |
| 44 | { fclose(fi); |
| 45 | continue; |
| 46 | } |
| 47 | do { |
| 48 | long o; |
| 49 | register n; |
| 50 | struct nlist sym; |
| 51 | |
| 52 | fread((char *)&exp, 1, sizeof(struct exec), fi); |
| 53 | if (BADMAG) /* archive element not in */ |
| 54 | continue; /* proper format - skip it */ |
| 55 | o = (long)exp.a_text + exp.a_data; |
| 56 | if ((exp.a_flag & 01) == 0) |
| 57 | o *= 2; |
| 58 | fseek(fi, o, 1); |
| 59 | n = exp.a_syms / sizeof(struct nlist); |
| 60 | if (n == 0) { |
| 61 | fprintf(stderr, "nm: %s-- no name list\n", arp.ar_name); |
| 62 | continue; |
| 63 | } |
| 64 | while (--n >= 0) { |
| 65 | fread((char *)&sym, 1, sizeof(sym), fi); |
| 66 | if ((sym.n_type&N_EXT)==0) |
| 67 | continue; |
| 68 | switch (sym.n_type&N_TYPE) { |
| 69 | |
| 70 | case N_UNDF: |
| 71 | continue; |
| 72 | |
| 73 | default: |
| 74 | stash(&sym); |
| 75 | continue; |
| 76 | } |
| 77 | } |
| 78 | } while(nextel(fi)); |
| 79 | new = fixsize(); |
| 80 | fclose(fi); |
| 81 | fo = fopen(tempnm, "w"); |
| 82 | if(fo == NULL) |
| 83 | { fprintf(stderr, "can't create temporary\n"); |
| 84 | exit(1); |
| 85 | } |
| 86 | fwrite((char *)tab, tnum, sizeof(struct tab), fo); |
| 87 | fclose(fo); |
| 88 | if(new) |
| 89 | sprintf(buf, "ar rlb %s %s %s\n", firstname, *argv, tempnm); |
| 90 | else sprintf(buf, "ar rl %s %s\n", *argv, tempnm); |
| 91 | if(system(buf)) |
| 92 | fprintf(stderr, "can't execute %s\n", buf); |
| 93 | else fixdate(*argv); |
| 94 | unlink(tempnm); |
| 95 | } |
| 96 | exit(0); |
| 97 | } |
| 98 | |
| 99 | nextel(af) |
| 100 | FILE *af; |
| 101 | { |
| 102 | register r; |
| 103 | |
| 104 | oldoff = off; |
| 105 | fseek(af, off, 0); |
| 106 | r = fread((char *)&arp, 1, sizeof(struct ar_hdr), af); /* read archive header */ |
| 107 | if (r <= 0) |
| 108 | return(0); |
| 109 | if (arp.ar_size & 1) |
| 110 | ++arp.ar_size; |
| 111 | off = ftell(af) + arp.ar_size; /* offset to next element */ |
| 112 | return(1); |
| 113 | } |
| 114 | |
| 115 | stash(s) struct nlist *s; |
| 116 | { int i; |
| 117 | if(tnum >= TABSZ) |
| 118 | { fprintf(stderr, "symbol table overflow\n"); |
| 119 | exit(1); |
| 120 | } |
| 121 | for(i=0; i<8; i++) |
| 122 | tab[tnum].cname[i] = s->n_name[i]; |
| 123 | tab[tnum].cloc = oldoff; |
| 124 | tnum++; |
| 125 | } |
| 126 | |
| 127 | fixsize() |
| 128 | { int i; |
| 129 | offdelta = tnum * sizeof(struct tab) + sizeof(arp); |
| 130 | off = sizeof(MAGIC); |
| 131 | nextel(fi); |
| 132 | if(strncmp(arp.ar_name, tempnm, 14) == 0) |
| 133 | { new = 0; |
| 134 | offdelta -= sizeof(arp) + arp.ar_size; |
| 135 | } |
| 136 | else |
| 137 | { new = 1; |
| 138 | strncpy(firstname, arp.ar_name, 14); |
| 139 | } |
| 140 | for(i=0; i<tnum; i++) |
| 141 | tab[i].cloc += offdelta; |
| 142 | return(new); |
| 143 | } |
| 144 | |
| 145 | /* patch time */ |
| 146 | fixdate(s) char *s; |
| 147 | { long timex, time(); |
| 148 | int fd; |
| 149 | fd = open(s, 1); |
| 150 | if(fd < 0) |
| 151 | { fprintf(stderr, "can't reopen %s\n", s); |
| 152 | return; |
| 153 | } |
| 154 | timex = time(NULL) + 5; /* should be enough time */ |
| 155 | lseek(fd, (long)sizeof(exp.a_magic) + ((char *)&arp.ar_date-(char *)&arp), 0); |
| 156 | write(fd, (char *)&timex, sizeof(timex)); |
| 157 | close(fd); |
| 158 | } |