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1 /*- |
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2 * |
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3 * Copyright (c) 1990, 1993 |
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4 * The Regents of the University of California. All rights reserved. |
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5 * |
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6 * This code is derived from software contributed to Berkeley by |
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7 * Chris Torek. |
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8 * |
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9 * Redistribution and use in source and binary forms, with or without |
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10 * modification, are permitted provided that the following conditions |
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11 * are met: |
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12 * 1. Redistributions of source code must retain the above copyright |
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13 * notice, this list of conditions and the following disclaimer. |
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14 * 2. Redistributions in binary form must reproduce the above copyright |
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15 * notice, this list of conditions and the following disclaimer in the |
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16 * documentation and/or other materials provided with the distribution. |
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17 * 4. Neither the name of the University nor the names of its contributors |
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18 * may be used to endorse or promote products derived from this software |
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19 * without specific prior written permission. |
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20 * |
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21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 * SUCH DAMAGE. |
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32 * * Portions Copyright (c) 2005-2006 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. |
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33 */ |
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34 |
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35 #if defined(LIBC_SCCS) && !defined(lint) |
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36 static char sccsid[] = "@(#)gets.c 8.1 (Berkeley) 6/4/93"; |
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37 #endif /* LIBC_SCCS and not lint */ |
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38 #include <sys/cdefs.h> |
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39 #ifndef __SYMBIAN32__ |
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40 __FBSDID("$FreeBSD: src/lib/libc/stdio/gets.c,v 1.16 2003/01/30 23:32:53 tjr Exp $"); |
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41 #endif |
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42 |
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43 #include "namespace.h" |
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44 #include <stdio.h> |
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45 #include <sys/cdefs.h> |
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46 #include "un-namespace.h" |
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47 #include <unistd.h> |
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48 #include "libc_private.h" |
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49 #include "local.h" |
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50 #include "common_def.h" |
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51 |
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52 #ifndef __SYMBIAN32__ |
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53 __warn_references(gets, "warning: this program uses gets(), which is unsafe."); |
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54 #endif |
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55 |
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56 #if (defined(__SYMBIAN32__) && (defined(__WINSCW__) || defined(__WINS__))) |
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57 #include "libc_wsd_defs.h" |
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58 #endif |
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59 |
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60 #ifdef EMULATOR |
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61 GET_STATIC_VAR_FROM_TLS(warned, int) |
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62 GET_STATIC_ARRAY_FROM_TLS(w, char) |
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63 |
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64 #define warned (*GET_WSD_VAR_NAME(warned, s)()) |
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65 #define w (GET_WSD_VAR_NAME(w, s)()) |
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66 #define WARNING_STR_SIZE 53 |
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67 #endif //EMULATOR |
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68 |
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69 EXPORT_C |
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70 char * |
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71 gets(buf) |
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72 char *buf; |
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73 { |
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74 int c; |
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75 char *s; |
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76 #ifndef EMULATOR |
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77 static int warned; |
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78 static char w[] = |
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79 "warning: this program uses gets(), which is unsafe.\n"; |
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80 #endif //EMULATOR |
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81 FLOCKFILE(stdin); |
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82 ORIENT(stdin, -1); |
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83 if (!warned) { |
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84 #ifndef EMULATOR |
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85 (void) _write(STDERR_FILENO, w, sizeof(w) - 1); |
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86 #else |
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87 (void) _write(STDERR_FILENO, w, WARNING_STR_SIZE); |
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88 #endif |
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89 warned = 1; |
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90 } |
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91 for (s = buf; (c = __sgetc(stdin)) != '\n';) |
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92 if (c == EOF) |
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93 if (s == buf) { |
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94 FUNLOCKFILE(stdin); |
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95 return (NULL); |
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96 } else |
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97 break; |
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98 else |
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99 *s++ = (char) c; |
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100 *s = 0; |
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101 FUNLOCKFILE(stdin); |
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102 return (buf); |
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103 } |