test builtin does not check for nanoseconds while comparing timestamps

[Siteshwar Vashisht]

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-redhat-linux-gnu' 
-DCONF_VENDOR='redhat' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL 
-DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib  -D_GNU_SOURCE -DRECYCLES_PIDS 
-DDEFAULT_PATH_VALUE='/usr/local/bin:/usr/bin'  -O2 -g -pipe -Wall 
-Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions 
-fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches 
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic
uname output: Linux localhost.localdomain 4.10.17-200.fc25.x86_64 #1 SMP Mon 
May 22 18:12:57 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-redhat-linux-gnu

Bash Version: 4.3
Patch Level: 43
Release Status: release

Description:
        If the modified timestamp of 2 files differ by less than 1 second, test 
builtin sometimes returns incorrect result. It happens because 
HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC is not defined in config.h.

Repeat-By:
        while true; do touch a; sleep 0.1; touch b; stat a b|grep Modify; [ b 
-nt a ] && echo test_cmd_ok || echo test_cmd_failed; echo; done
        

Fix:
        Attached patch fixes this issue.

-- 
--
Siteshwar Vashisht

0001-Fix-macro-check-for-struct-stat.st_atim.tv_nsec.patch
Description: Text Data