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1 /* |
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2 cntl.c - implementation of the elf_cntl(3) function. |
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3 Copyright (C) 1995 - 1998 Michael Riepe |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 */ |
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19 |
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20 #include <private.h> |
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21 |
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22 #ifndef lint |
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23 static const char rcsid[] = "@(#) $Id: cntl.c,v 1.6 2005/05/21 15:39:21 michael Exp $"; |
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24 #endif /* lint */ |
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25 |
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26 int |
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27 elf_cntl(Elf *elf, Elf_Cmd cmd) { |
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28 Elf_Scn *scn; |
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29 Elf *child; |
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30 |
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31 if (!elf) { |
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32 return -1; |
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33 } |
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34 elf_assert(elf->e_magic == ELF_MAGIC); |
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35 if (cmd == ELF_C_FDREAD) { |
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36 if (!elf->e_readable) { |
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37 seterr(ERROR_WRONLY); |
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38 return -1; |
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39 } |
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40 } |
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41 else if (cmd != ELF_C_FDDONE) { |
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42 seterr(ERROR_INVALID_CMD); |
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43 return -1; |
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44 } |
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45 if (elf->e_disabled) { |
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46 return 0; |
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47 } |
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48 if (elf->e_kind == ELF_K_AR) { |
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49 for (child = elf->e_members; child; child = child->e_link) { |
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50 elf_assert(elf == child->e_parent); |
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51 if (elf_cntl(child, cmd)) { |
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52 return -1; |
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53 } |
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54 } |
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55 } |
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56 else if (elf->e_kind == ELF_K_ELF && cmd == ELF_C_FDREAD) { |
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57 if (!elf->e_ehdr && !_elf_cook(elf)) { |
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58 return -1; |
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59 } |
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60 for (scn = elf->e_scn_1; scn; scn = scn->s_link) { |
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61 if (scn->s_index == SHN_UNDEF || scn->s_type == SHT_NULL) { |
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62 continue; |
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63 } |
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64 else if (!elf_getdata(scn, NULL)) { |
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65 return -1; |
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66 } |
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67 } |
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68 } |
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69 elf->e_disabled = 1; |
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70 return 0; |
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71 } |