| Commit | Line | Data |
|---|
| 2304df62 |
1 | ?RCS: $Id: d_strerror.U,v 3.0.1.1 1994/01/24 14:08:56 ram Exp $ |
| 2 | ?RCS: |
| 3 | ?RCS: Copyright (c) 1991-1993, Raphael Manfredi |
| 4 | ?RCS: |
| 5 | ?RCS: You may redistribute only under the terms of the Artistic Licence, |
| 6 | ?RCS: as specified in the README file that comes with the distribution. |
| 7 | ?RCS: You may reuse parts of this distribution only within the terms of |
| 8 | ?RCS: that same Artistic Licence; a copy of which may be found at the root |
| 9 | ?RCS: of the source tree for dist 3.0. |
| 10 | ?RCS: |
| 11 | ?RCS: $Log: d_strerror.U,v $ |
| 12 | ?RCS: Revision 3.0.1.1 1994/01/24 14:08:56 ram |
| 13 | ?RCS: patch16: protected code looking for sys_errnolist[] with @if |
| 14 | ?RCS: patch16: added default value for d_sysernlst |
| 15 | ?RCS: |
| 16 | ?RCS: Revision 3.0 1993/08/18 12:07:35 ram |
| 17 | ?RCS: Baseline for dist 3.0 netwide release. |
| 18 | ?RCS: |
| 19 | ?MAKE:d_strerror d_syserrlst d_sysernlst d_strerrm: contains Csym Findhdr |
| 20 | ?MAKE: -pick add $@ %< |
| 21 | ?S:d_strerror: |
| 22 | ?S: This variable conditionally defines HAS_STRERROR if strerror() is |
| 23 | ?S: available to translate error numbers to strings. |
| 24 | ?S:. |
| 25 | ?S:d_syserrlst: |
| 26 | ?S: This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is |
| 27 | ?S: available to translate error numbers to strings. |
| 28 | ?S:. |
| 29 | ?S:d_sysernlst: |
| 30 | ?S: This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[] |
| 31 | ?S: is available to translate error numbers to the symbolic name. |
| 32 | ?S:. |
| 33 | ?S:d_strerrm: |
| 34 | ?S: This variable conditionally defines strerrr as a macro if the |
| 35 | ?S: sys_errlist[] array is defined. |
| 36 | ?S:. |
| 37 | ?C:HAS_STRERROR (STRERROR): |
| 38 | ?C: This symbol, if defined, indicates that the strerror routine is |
| 39 | ?C: available to translate error numbers to strings. See the writeup |
| 40 | ?C: of Strerror() in this file before you try to define your own. |
| 41 | ?C:. |
| 42 | ?C:HAS_SYS_ERRLIST (SYSERRLIST): |
| 43 | ?C: This symbol, if defined, indicates that the sys_errlist array is |
| 44 | ?C: available to translate error numbers to strings. The extern int |
| 45 | ?C: sys_nerr gives the size of that table. |
| 46 | ?C:. |
| 47 | ?C:HAS_SYS_ERRNOLIST (SYSERRNOLIST): |
| 48 | ?C: This symbol, if defined, indicates that the sys_errnolist array is |
| 49 | ?C: available to translate an errno code into its symbolic name (e.g. |
| 50 | ?C: ENOENT). The extern int sys_nerrno gives the size of that table. |
| 51 | ?C:. |
| 52 | ?C:Strerror: |
| 53 | ?C: This preprocessor symbol is defined as a macro if strerror() is |
| 54 | ?C: not available to translate error numbers to strings but sys_errlist[] |
| 55 | ?C: array is there. |
| 56 | ?C:. |
| 57 | ?H:#$d_strerror HAS_STRERROR /**/ |
| 58 | ?H:#$d_syserrlst HAS_SYS_ERRLIST /**/ |
| 59 | ?H:#$d_sysernlst HAS_SYS_ERRNOLIST /**/ |
| 60 | ?H:?%<:#ifdef HAS_STRERROR |
| 61 | ?H:?%<:# define Strerror strerror |
| 62 | ?H:?%<:#else |
| 63 | ?H:#$d_strerrm Strerror(e) ((e)<0||(e)>=sys_nerr?"unknown":sys_errlist[e]) /**/ |
| 64 | ?H:?%<:#endif |
| 65 | ?H:. |
| 66 | ?D:d_sysernlst='' |
| 67 | ?T:xxx val |
| 68 | : see if strerror and/or sys_errlist[] exist |
| 69 | echo " " |
| 70 | if set strerror val -f d_strerror; eval $csym; $val; then |
| 71 | echo 'strerror() found.' >&4 |
| 72 | d_strerror="$define" |
| 73 | d_strerrm="$undef" |
| 74 | if set sys_errlist val -a d_syserrlst; eval $csym; $val; then |
| 75 | echo "(You also have sys_errlist[], so we could roll our own strerror.)" |
| 76 | d_syserrlst="$define" |
| 77 | else |
| 78 | echo "(Since you don't have sys_errlist[], sterror() is welcome.)" |
| 79 | d_syserrlst="$undef" |
| 80 | fi |
| 81 | elif xxx=`./findhdr string.h`; test "$xxx" || xxx=`./findhdr strings.h`; \ |
| 82 | $contains '#[ ]*define.*strerror' "$xxx" >/dev/null 2>&1; then |
| 83 | echo 'strerror() found in string header.' >&4 |
| 84 | d_strerror="$define" |
| 85 | d_strerrm="$undef" |
| 86 | if set sys_errlist val -a d_syserrlst; eval $csym; $val; then |
| 87 | echo "(Most probably, strerror() uses sys_errlist[] for descriptions.)" |
| 88 | d_syserrlst="$define" |
| 89 | else |
| 90 | echo "(You don't appear to have any sys_errlist[], how can this be?)" |
| 91 | d_syserrlst="$undef" |
| 92 | fi |
| 93 | elif set sys_errlist val -a d_syserrlst; eval $csym; $val; then |
| 94 | echo "strerror() not found, but you have sys_errlist[] so we'll use that." >&4 |
| 95 | d_strerror="$undef" |
| 96 | d_syserrlst="$define" |
| 97 | d_strerrm="$define" |
| 98 | else |
| 99 | echo 'strerror() and sys_errlist[] NOT found.' >&4 |
| 100 | d_strerror="$undef" |
| 101 | d_syserrlst="$undef" |
| 102 | d_strerrm="$undef" |
| 103 | fi |
| 104 | @if d_sysernlst || HAS_SYS_ERRNOLIST |
| 105 | if set sys_errnolist val -a d_sysernlst; eval $csym; $val; then |
| 106 | echo "(Symbolic error codes can be fetched via the sys_errnolist[] array.)" |
| 107 | d_sysernlst="$define" |
| 108 | else |
| 109 | echo "(However, I can't extract the symbolic error code out of errno.)" |
| 110 | d_sysernlst="$undef" |
| 111 | fi |
| 112 | @end |
| 113 | |
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