| 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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