long-options: add parse_gnu_standard_options_only Discussed in https://bugs.gnu.org/33468 . * lib/long-options.c (parse_long_options): Use EXIT_SUCCESS instead of 0. (parse_gnu_standard_options_only): Add function to process the GNU default options --help and --version and fail for any other unknown long or short option. See https://gnu.org/prep/standards/html_node/Command_002dLine-Interfaces.html . * lib/long-options.h (parse_gnu_standard_options_only): Declare it. * modules/long-options (depends-on): Add stdbool, exitfail. * top/maint.mk (sc_prohibit_long_options_without_use): Update syntax-check rule, add new function name.

Description:
fd_safer_flag() function: adjust a file descriptor result so that it avoids
clobbering STD{IN,OUT,ERR}_FILENO, with specific flags.

Files:
lib/fd-safer-flag.c
lib/dup-safer-flag.c

Depends-on:
cloexec
fcntl
unistd-safer

configure.ac:
gl_MODULE_INDICATOR([fd-safer-flag])

Makefile.am:
lib_SOURCES += fd-safer-flag.c dup-safer-flag.c

Include:
"unistd-safer.h"

License:
GPL

Maintainer:
Eric Blake