1 | /* Copyright (C) 1996, 1997, 1999, 2000 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
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3 | |
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4 | The GNU C Library is free software; you can redistribute it and/or |
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5 | modify it under the terms of the GNU Lesser General Public |
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6 | License as published by the Free Software Foundation; either |
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7 | version 2.1 of the License, or (at your option) any later version. |
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8 | |
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9 | The GNU C Library is distributed in the hope that it will be useful, |
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10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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12 | Lesser General Public License for more details. |
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13 | |
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14 | You should have received a copy of the GNU Lesser General Public |
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15 | License along with the GNU C Library; if not, write to the Free |
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16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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17 | 02111-1307 USA. */ |
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18 | |
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19 | #include <errno.h> |
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20 | #define _IO_MTSAFE_IO |
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21 | #include <bits/libc-lock.h> |
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22 | #include <stdlib.h> |
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23 | |
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24 | #include "nsswitch.h" |
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25 | |
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26 | /*******************************************************************\ |
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27 | |* Here we assume several symbols to be defined: *| |
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28 | |* *| |
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29 | |* LOOKUP_TYPE - the return type of the function *| |
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30 | |* *| |
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31 | |* GETFUNC_NAME - name of the non-reentrant getXXXent function *| |
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32 | |* *| |
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33 | |* BUFLEN - size of static buffer *| |
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34 | |* *| |
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35 | |* Optionally the following vars can be defined: *| |
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36 | |* *| |
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37 | |* NEED_H_ERRNO - an extra parameter will be passed to point to *| |
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38 | |* the global `h_errno' variable. *| |
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39 | |* *| |
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40 | \*******************************************************************/ |
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41 | |
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42 | /* To make the real sources a bit prettier. */ |
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43 | #define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME) |
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44 | #define APPEND_R(name) APPEND_R1 (name) |
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45 | #define APPEND_R1(name) name##_r |
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46 | #define INTERNAL(name) INTERNAL1 (name) |
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47 | #define INTERNAL1(name) __##name |
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48 | |
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49 | /* Sometimes we need to store error codes in the `h_errno' variable. */ |
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50 | #ifdef NEED_H_ERRNO |
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51 | # define H_ERRNO_PARM , int *h_errnop |
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52 | # define H_ERRNO_VAR &h_errno |
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53 | #else |
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54 | # define H_ERRNO_PARM |
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55 | # define H_ERRNO_VAR NULL |
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56 | #endif |
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57 | |
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58 | /* Prototype of the reentrant version. */ |
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59 | extern int INTERNAL (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer, |
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60 | size_t buflen, LOOKUP_TYPE **result |
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61 | H_ERRNO_PARM); |
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62 | |
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63 | /* We need to protect the dynamic buffer handling. */ |
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64 | __libc_lock_define_initialized (static, lock); |
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65 | |
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66 | /* This points to the static buffer used. */ |
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67 | libc_freeres_ptr (static char *buffer); |
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68 | |
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69 | |
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70 | LOOKUP_TYPE * |
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71 | GETFUNC_NAME (void) |
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72 | { |
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73 | static size_t buffer_size; |
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74 | static union |
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75 | { |
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76 | LOOKUP_TYPE l; |
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77 | void *ptr; |
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78 | } resbuf; |
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79 | LOOKUP_TYPE *result; |
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80 | int save; |
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81 | |
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82 | /* Get lock. */ |
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83 | __libc_lock_lock (lock); |
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84 | |
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85 | result = (LOOKUP_TYPE *) |
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86 | __nss_getent ((getent_r_function) INTERNAL (REENTRANT_GETNAME), |
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87 | &resbuf.ptr, &buffer, BUFLEN, &buffer_size, |
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88 | H_ERRNO_VAR); |
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89 | |
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90 | save = errno; |
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91 | __libc_lock_unlock (lock); |
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92 | __set_errno (save); |
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93 | return result; |
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94 | } |
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95 | |
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96 | static_link_warning (GETFUNC_NAME) |
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