diff options
Diffstat (limited to 'gnulib/m4/pwrite.m4')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/m4/pwrite.m4 | 103 |
2 files changed, 103 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/m4/pwrite.m4 b/gnulib/m4/pwrite.m4 new file mode 100644 index 0000000..d400168 --- /dev/null +++ b/gnulib/m4/pwrite.m4 @@ -0,0 +1,103 @@ +# pwrite.m4 serial 4 +dnl Copyright (C) 2010-2011 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_FUNC_PWRITE], +[ + AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + + dnl Persuade glibc <unistd.h> to declare pwrite(). + AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) + + AC_CHECK_FUNCS_ONCE([pwrite]) + if test $ac_cv_func_pwrite = yes; then + dnl On HP-UX 11.11 with _FILE_OFFSET_BITS=64, pwrite() on a file does not + dnl fail when an invalid (negative) offset is passed and uses an arbitrary + dnl offset instead of the argument. + AC_CACHE_CHECK([whether pwrite works], + [gl_cv_func_pwrite_works], + [ + dnl Initial guess, used when cross-compiling. +changequote(,)dnl + case "$host_os" in + # Guess no on HP-UX. + hpux*) gl_cv_func_pwrite_works="guessing no" ;; + # Guess yes otherwise. + *) gl_cv_func_pwrite_works="guessing yes" ;; + esac +changequote([,])dnl + gl_save_CPPFLAGS="$CPPFLAGS" + CPPFLAGS="$CPPFLAGS -D_FILE_OFFSET_BITS=64" + rm -f conftest.out + AC_RUN_IFELSE( + [AC_LANG_PROGRAM([[ +#include <sys/types.h> +#include <unistd.h> +#include <fcntl.h> + ]], + [[ +{ + /* This test fails on HP-UX 11.00..11.11. */ + { + int fd = open ("conftest.out", O_RDWR | O_CREAT | O_TRUNC, 0600); + if (fd < 0) + return 1; + if (pwrite (fd, "b", 1, (off_t) -1) >= 0) + return 2; + } + /* This test fails on HP-UX 11.00..11.11. */ + { + int fd; + char buf[] = "01"; + + fd = open ("conftest.out", O_WRONLY | O_CREAT | O_TRUNC, 0600); + if (fd < 0) + return 3; + if (write (fd, buf, 2) < 2) + return 4; + if (close (fd) < 0) + return 5; + + fd = open ("conftest.out", O_WRONLY, 0600); + if (fd < 0) + return 6; + if (pwrite (fd, "W", 1, (off_t) 0) != 1) + return 7; + if (close (fd) < 0) + return 8; + + fd = open ("conftest.out", O_RDONLY); + if (fd < 0) + return 9; + if (read (fd, buf, 2) < 2) + return 10; + if (close (fd) < 0) + return 11; + if (buf[0] != 'W') + return 12; + if (buf[1] != '1') + return 13; + } + return 0; +} + + + return 0; +}]])], + [gl_cv_func_pwrite_works=yes], + [gl_cv_func_pwrite_works=no], + [:]) + rm -f conftest.out + CPPFLAGS="$gl_save_CPPFLAGS" + ]) + case "$gl_cv_func_pwrite_works" in + *yes) ;; + *) REPLACE_PWRITE=1 ;; + esac + else + HAVE_PWRITE=0 + fi +]) |