test currently produces this error message with -N $ /bin/test -N / /bin/test: extra argument ‘-N’
which is different from what you get with an invalid unary operator $ /bin/test -q / /bin/test: ‘-q’: unary operator expected bash's test -N is supported in test_unop, but the actual test isn't there since src/test.c and the one in bash share a common root, i thought it makes sense to implement it here as well --- xoxo iza
From 482095cffe9cf4bd2bab0ae27955c16e0aceed96 Mon Sep 17 00:00:00 2001 From: izabera <[email protected]> Date: Thu, 8 Dec 2016 17:44:22 +0100 Subject: [PATCH] test: implement -N support for N in test_unop was added by Jim Meyering over 13 years ago in b4fa822482de9eaa4b5d429881de9d145d802f5e * src/test.c: implement -N * doc/coreutils.texi: document it --- doc/coreutils.texi | 7 ++++++- src/test.c | 6 ++++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/doc/coreutils.texi b/doc/coreutils.texi index a507280..5412a29 100644 --- a/doc/coreutils.texi +++ b/doc/coreutils.texi @@ -12501,7 +12501,7 @@ Exit status: @menu * File type tests:: -[bcdfhLpSt] * Access permission tests:: -[gkruwxOG] -* File characteristic tests:: -e -s -nt -ot -ef +* File characteristic tests:: -e -s -N -nt -ot -ef * String tests:: -z -n = == != * Numeric tests:: -eq -ne -lt -le -gt -ge * Connectives for test:: ! -a -o @@ -12638,6 +12638,11 @@ True if @var{file} exists. @cindex nonempty file check True if @var{file} exists and has a size greater than zero. +@item -N @var{file} +@opindex -N +@cindex modified since it was last read check +True if @var{file} exists and has been modified since it was last read. + @item @var{file1} -nt @var{file2} @opindex -nt @cindex newer-than file check diff --git a/src/test.c b/src/test.c index 8ac7467..c09d00d 100644 --- a/src/test.c +++ b/src/test.c @@ -445,6 +445,11 @@ unary_operator (void) return ! (egid == NO_GID && errno) && egid == stat_buf.st_gid; } + case 'N': /* File was modified since it was last read */ + unary_advance (); + return (stat (argv[pos - 1], &stat_buf) == 0 + && stat_buf.st_atime <= stat_buf.st_mtime); + case 'f': /* File is a file? */ unary_advance (); /* Under POSIX, -f is true if the given file exists @@ -770,6 +775,7 @@ EXPRESSION is true or false and sets exit status. It is one of:\n\ "), stdout); fputs (_("\ -L FILE FILE exists and is a symbolic link (same as -h)\n\ + -N FILE FILE exists and has been modified since it was last read\n\ -O FILE FILE exists and is owned by the effective user ID\n\ -p FILE FILE exists and is a named pipe\n\ -r FILE FILE exists and read permission is granted\n\ -- 2.10.2
