1 # Copyright (C) 1991-2015 Free Software Foundation, Inc.
2 # This file is part of the GNU C Library.
4 # The GNU C Library is free software; you can redistribute it and/or
5 # modify it under the terms of the GNU Lesser General Public
6 # License as published by the Free Software Foundation; either
7 # version 2.1 of the License, or (at your option) any later version.
9 # The GNU C Library is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 # Lesser General Public License for more details.
14 # You should have received a copy of the GNU Lesser General Public
15 # License along with the GNU C Library; if not, see
16 # <http://www.gnu.org/licenses/>.
18 # errno.texinfo contains lines like:
20 # @comment POSIX.1: Function not implemented
21 # @deftypevr Macro int ENOSYS
25 print "/* This file generated by errnos.awk. */";
27 print "/* The Hurd uses Mach error system 0x10, currently only subsystem 0. */";
28 print "#ifndef _HURD_ERRNO";
29 print "#define _HURD_ERRNO(n)\t((0x10 << 26) | ((n) & 0x3fff))";
32 print "#ifdef _ERRNO_H\n";
33 print "enum __error_t_codes\n{";
34 print "\t/* The value zero always means success and it is perfectly fine for";
35 print "\t code to use 0 explicitly (or implicitly, e.g. via Boolean coercion).";
36 print "\t Having an enum entry for zero both makes the debugger print the name";
37 print "\t for error_t-typed zero values, and prevents the compiler from";
38 print "\t issuing warnings about 'case 0:' in a switch on an error_t-typed";
40 print "\tESUCCESS = 0,"
47 print "#undef EDOM\n#undef ERANGE";
51 $
1 ==
"@comment" && $
2 ==
"errno.h" { errnoh=
1; next }
52 $
1 ==
"@comment" && errnoh ==
1 \
56 for (i =
3; i
<=
NF; ++i
)
61 errnoh ==
2 && $
1 ==
"@deftypevr" && $
2 ==
"Macro" && $
3 ==
"int" \
62 { ++errnoh
; e = $
4; next; }
64 errnoh ==
3 && $
1 ==
"@comment" && $
2 ==
"errno" {
65 if (e ==
"EWOULDBLOCK")
67 lines
[lno
++]=
"#define EWOULDBLOCK EAGAIN /* Operation would block */";
73 if (errno > maxerrno
) maxerrno =
errno;
74 x =
sprintf ("%-40s/*%s */", sprintf ("%-24s%s", "#define\t" e
,
75 "_HURD_ERRNO (" errno ")"),
79 else if (e ==
"ERANGE")
82 lines
[lno
++] =
sprintf("\t%-16s= _HURD_ERRNO (%d)", e
, errno);
88 NF ==
3 && $
1 ==
"#define" && $
2 ==
"MACH_SEND_IN_PROGRESS" \
90 in_mach_errors =
FILENAME;
91 lines
[lno
++] =
"\n\t/* Errors from <mach/message.h>. */";
93 NF ==
3 && $
1 ==
"#define" && $
2 ==
"KERN_SUCCESS" \
95 in_mach_errors =
FILENAME;
96 lines
[lno
++] =
"\n\t/* Errors from <mach/kern_return.h>. */";
100 in_mach_errors
!= "" && $
2 ==
"MACH_IPC_COMPAT" \
105 in_mach_errors ==
FILENAME && NF ==
3 && $
1 ==
"#define" \
108 lines
[lno
++] =
sprintf("\t%-32s= %s", "E" $
2, $
3);
111 $
1 ==
"#define" && $
2 ==
"_MACH_MIG_ERRORS_H_" \
114 lines
[lno
++] =
"\n\t/* Errors from <mach/mig_errors.h>. */";
117 in_mig_errors
&& $
1 ==
"#endif" && $
3 ==
"_MACH_MIG_ERRORS_H_" \
122 (in_mig_errors
&& $
1 ==
"#define" && $
3 <=
-300) || \
123 (in_device_errors
&& $
1 ==
"#define" && /D_
/ && NF > 3) \
126 for (i =
4; i
<=
NF; ++i
)
127 comment = comment
" " $i
;
129 lines
[lno
++] =
sprintf("%-32s", sprintf ("\t%-24s= %s", "E" $
2, $
3)) comment
;
132 $
1 ==
"#define" && $
2 ==
"D_SUCCESS" \
134 in_device_errors =
1;
135 lines
[lno
++] =
"\n\t/* Errors from <device/device_types.h>. */";
138 in_device_errors
&& $
1 ==
"#endif" \
140 in_device_errors =
0;
146 for (i =
0; i
< lno
- 1; ++i
)
147 printf "%s%s\n", lines
[i
], (comma
[i
] ?
"," : "");
152 printf "#define\t_HURD_ERRNOS\t%d\n", maxerrno
+1;
155 /* User-visible type of error codes. It is ok to use `int' or\n\
156 `kern_return_t' for these, but with `error_t' the debugger prints\n\
157 symbolic values. */";
158 print "#ifdef __USE_GNU";
159 print "typedef enum __error_t_codes error_t;"
160 print "#define __error_t_defined\t1"
164 /* Return the current thread's location for `errno'.\n\
165 The syntax of this function allows redeclarations like `int errno'. */\n\
166 extern int *__errno_location (void) __THROW __attribute__ ((__const__));\n\
168 #define errno (*__errno_location ())\n\
170 print "#endif /* <errno.h> included. */";
172 print "#if !defined (_ERRNO_H) && defined (__need_Emath)";
173 print edom
; print erange
;
174 print "#endif /* <errno.h> not included and need math error codes. */";