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| author | Peter Stephenson <pws@users.sourceforge.net> | 2008-12-01 12:26:24 +0000 |
|---|---|---|
| committer | Peter Stephenson <pws@users.sourceforge.net> | 2008-12-01 12:26:24 +0000 |
| commit | 815cf483683f37c16b0cc9f04916ac0435b423b7 (patch) | |
| tree | 82b1a4c93cf21815682809498ae85eb19986351a | |
| parent | 94b39fe1959c7ce038c2aab598340eadf1441b98 (diff) | |
| download | zsh-815cf483683f37c16b0cc9f04916ac0435b423b7.tar.gz zsh-815cf483683f37c16b0cc9f04916ac0435b423b7.tar.xz zsh-815cf483683f37c16b0cc9f04916ac0435b423b7.zip | |
26103: use FIFOs rather than FD files for process substititution on Cygwin
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | configure.ac | 15 |
2 files changed, 19 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog index f4b95236d..59d69a5a6 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2008-12-01 Peter Stephenson <pws@csr.com> + + * (with some help from Peter A. Castro): 26103: configure.ac: + FIFOs seem to be more reliable than per-process FD files for + process substitution on current Cygwin. + 2008-11-27 Peter Stephenson <pws@csr.com> * 26095: Src/utils.c: failed to compile if TIOCGWINSZ wasn't diff --git a/configure.ac b/configure.ac index f68b1b9bc..762b23130 100644 --- a/configure.ac +++ b/configure.ac @@ -1787,9 +1787,17 @@ dnl be good enough. AH_TEMPLATE([PATH_DEV_FD], [Define to the path of the /dev/fd filesystem.]) AC_CACHE_CHECK(for /dev/fd filesystem, zsh_cv_sys_path_dev_fd, +[if test "$host_os" = cygwin; then +dnl In current (2008/12/01) versions of Cygwin these are present but don't +dnl seem to work smoothly for process substitution; no great surprise +dnl since getting processes to work at all on Cygwin is a big challenge. +dnl We'll rely on FIFOs, since they do what we need. +zsh_cv_sys_path_dev_fd=no +else [for zsh_cv_sys_path_dev_fd in /proc/self/fd /dev/fd no; do test x`echo ok|(exec 3<&0; cat $zsh_cv_sys_path_dev_fd/3 2>/dev/null;)` = xok && break - done]) + done] +fi]) if test x$zsh_cv_sys_path_dev_fd != xno; then AC_DEFINE_UNQUOTED(PATH_DEV_FD, "$zsh_cv_sys_path_dev_fd") fi @@ -1954,10 +1962,13 @@ fi dnl ----------- dnl named FIFOs dnl ----------- +dnl +dnl Named FIFOs work well enough on recent versions of Cygwin +dnl to provide what we want. Simply enable them. AC_CACHE_CHECK(if named FIFOs work, zsh_cv_sys_fifo, [if test "$host_os" = cygwin; then -zsh_cv_sys_fifo=no +zsh_cv_sys_fifo=yes else AC_TRY_RUN([ #include <fcntl.h> |