1 | /* |
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2 | * Standard system includes and portability adjustments. |
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3 | * |
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4 | * Declarations of routines and variables in the C library. Including this |
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5 | * file is the equivalent of including all of the following headers, |
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6 | * portably: |
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7 | * |
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8 | * #include <sys/types.h> |
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9 | * #include <stdarg.h> |
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10 | * #include <stdbool.h> |
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11 | * #include <stdio.h> |
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12 | * #include <stdlib.h> |
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13 | * #include <stddef.h> |
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14 | * #include <stdint.h> |
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15 | * #include <string.h> |
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16 | * #include <unistd.h> |
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17 | * |
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18 | * Missing functions are provided via #define or prototyped if available from |
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19 | * the util helper library. Also provides some standard #defines. |
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20 | * |
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21 | * Written by Russ Allbery <rra@stanford.edu> |
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22 | * This work is hereby placed in the public domain by its author. |
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23 | */ |
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24 | |
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25 | #ifndef PORTABLE_SYSTEM_H |
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26 | #define PORTABLE_SYSTEM_H 1 |
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27 | |
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28 | /* Make sure we have our configuration information. */ |
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29 | #include <config.h> |
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30 | |
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31 | /* BEGIN_DECL and __attribute__. */ |
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32 | #include <portable/macros.h> |
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33 | |
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34 | /* A set of standard ANSI C headers. We don't care about pre-ANSI systems. */ |
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35 | #include <stdarg.h> |
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36 | #include <stddef.h> |
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37 | #include <stdio.h> |
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38 | #include <stdlib.h> |
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39 | #include <sys/types.h> |
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40 | #include <string.h> |
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41 | #if HAVE_INTTYPES_H |
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42 | # include <inttypes.h> |
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43 | #endif |
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44 | #if HAVE_STDINT_H |
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45 | # include <stdint.h> |
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46 | #endif |
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47 | #if HAVE_UNISTD_H |
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48 | # include <unistd.h> |
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49 | #endif |
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50 | |
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51 | /* SCO OpenServer gets int32_t from here. */ |
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52 | #if HAVE_SYS_BITYPES_H |
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53 | # include <sys/bitypes.h> |
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54 | #endif |
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55 | |
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56 | /* Get the bool type. */ |
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57 | #include <portable/stdbool.h> |
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58 | |
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59 | BEGIN_DECLS |
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60 | |
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61 | /* |
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62 | * Provide prototypes for functions not declared in system headers. Use the |
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63 | * HAVE_DECL macros for those functions that may be prototyped but implemented |
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64 | * incorrectly or implemented without a prototype. |
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65 | */ |
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66 | #if !HAVE_ASPRINTF |
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67 | extern int asprintf(char **, const char *, ...) |
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68 | __attribute__((__visibility__("hidden"))); |
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69 | extern int vasprintf(char **, const char *, va_list) |
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70 | __attribute__((__visibility__("hidden"))); |
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71 | #endif |
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72 | #if !HAVE_DECL_SNPRINTF |
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73 | extern int snprintf(char *, size_t, const char *, ...) |
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74 | __attribute__((__format__(printf, 3, 4))); |
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75 | #endif |
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76 | #if !HAVE_DECL_VSNPRINTF |
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77 | extern int vsnprintf(char *, size_t, const char *, va_list); |
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78 | #endif |
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79 | #if !HAVE_DAEMON |
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80 | extern int daemon(int, int) |
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81 | __attribute__((__visibility__("hidden"))); |
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82 | #endif |
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83 | #if !HAVE_SETENV |
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84 | extern int setenv(const char *, const char *, int) |
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85 | __attribute__((__visibility__("hidden"))); |
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86 | #endif |
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87 | #if !HAVE_STRLCAT |
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88 | extern size_t strlcat(char *, const char *, size_t) |
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89 | __attribute__((__visibility__("hidden"))); |
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90 | #endif |
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91 | #if !HAVE_STRLCPY |
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92 | extern size_t strlcpy(char *, const char *, size_t) |
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93 | __attribute__((__visibility__("hidden"))); |
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94 | #endif |
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95 | |
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96 | END_DECLS |
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97 | |
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98 | /* Windows provides snprintf under a different name. */ |
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99 | #ifdef _WIN32 |
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100 | # define snprintf _snprintf |
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101 | #endif |
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102 | |
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103 | /* |
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104 | * POSIX requires that these be defined in <unistd.h>. If one of them has |
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105 | * been defined, all the rest almost certainly have. |
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106 | */ |
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107 | #ifndef STDIN_FILENO |
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108 | # define STDIN_FILENO 0 |
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109 | # define STDOUT_FILENO 1 |
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110 | # define STDERR_FILENO 2 |
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111 | #endif |
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112 | |
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113 | /* |
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114 | * C99 requires va_copy. Older versions of GCC provide __va_copy. Per the |
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115 | * Autoconf manual, memcpy is a generally portable fallback. |
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116 | */ |
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117 | #ifndef va_copy |
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118 | # ifdef __va_copy |
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119 | # define va_copy(d, s) __va_copy((d), (s)) |
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120 | # else |
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121 | # define va_copy(d, s) memcpy(&(d), &(s), sizeof(va_list)) |
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122 | # endif |
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123 | #endif |
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124 | |
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125 | #endif /* !PORTABLE_SYSTEM_H */ |
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