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| author | Eli Zaretskii <eliz@gnu.org> | 2016-11-04 09:48:28 +0200 |
|---|---|---|
| committer | Eli Zaretskii <eliz@gnu.org> | 2016-11-04 09:48:28 +0200 |
| commit | 3fa6f02daabc1bf2cc21f7854c4af990627a8863 (patch) | |
| tree | f6070d5eaf9eb29256bbf62a9ce84ec787d2a078 /pc | |
| parent | 95aa1b0f60981430eb5cca81ead2d86d3c2793e1 (diff) | |
| download | egawk-3fa6f02daabc1bf2cc21f7854c4af990627a8863.tar.gz egawk-3fa6f02daabc1bf2cc21f7854c4af990627a8863.tar.bz2 egawk-3fa6f02daabc1bf2cc21f7854c4af990627a8863.zip | |
Improve behavior on MS-Windows when stdout is redirected to a pipe.
Diffstat (limited to 'pc')
| -rw-r--r-- | pc/ChangeLog | 5 | ||||
| -rw-r--r-- | pc/gawkmisc.pc | 26 |
2 files changed, 28 insertions, 3 deletions
diff --git a/pc/ChangeLog b/pc/ChangeLog index 7ba5fd9c..1ff3bb1f 100644 --- a/pc/ChangeLog +++ b/pc/ChangeLog @@ -1,3 +1,8 @@ +2016-11-04 Eli Zaretskii <eliz@gnu.org> + + * gawkmisc.pc (w32_maybe_set_errno) [__MINGW32__]: New function, + to correct errno when it is not set to a useful value. + 2016-09-24 Eli Zaretskii <eliz@gnu.org> Fix compilation warnings on MinGW with the latest runtime. diff --git a/pc/gawkmisc.pc b/pc/gawkmisc.pc index 9939fb48..817e8167 100644 --- a/pc/gawkmisc.pc +++ b/pc/gawkmisc.pc @@ -1,6 +1,4 @@ -/* - * gawkmisc.c --- miscellaneous gawk routines that are OS specific. - */ +/* gawkmisc.c --- miscellaneous gawk routines that are OS specific. -*-C-*- */ /* * Copyright (C) 1986, 1988, 1989, 1991 - 2003, 2012, 2016 @@ -897,6 +895,28 @@ w32_status_to_termsig (unsigned status) return SIGTERM; } +void +w32_maybe_set_errno (void) +{ + DWORD w32err = GetLastError (); + + switch (w32err) + { + /* When stdout is redirected to a pipe, and the program that + reads the pipe (e.g., a pager) exits, Windows doesn't set + errno to a useful value. Help it DTRT. */ + case ERROR_BAD_PIPE: + case ERROR_PIPE_BUSY: + case ERROR_NO_DATA: + case ERROR_PIPE_NOT_CONNECTED: + errno = EPIPE; + break; + default: + errno = EINVAL; + break; + } +} + #endif /* __MINGW32__ */ #if defined(__DJGPP__) || defined(__MINGW32__) || defined(__EMX__) |