ztest

A Zig implementation of the GNU test command.

Synopsis

test EXPRESSION
test
[ EXPRESSION ]
[ ]
[ OPTION

Description

Exit with the status determined by EXPRESSION.

option	meaning
--help	display this help and exit
--version	output version information and exit

An omitted EXPRESSION defaults to false. Otherwise, EXPRESSION is true or false and sets exit status. It is one of:

arguments	meaning
( EXPRESSION )	EXPRESSION is true
! EXPRESSION	EXPRESSION is false
EXPRESSION1 -a EXPRESSION2	both EXPRESSION1 and EXPRESSION2 are true
EXPRESSION1 -o EXPRESSION2	either EXPRESSION1 or EXPRESSION2 is true
-n STRING	the length of STRING is nonzero
STRING	equivalent to -n STRING
-z STRING	the length of STRING is zero
STRING1 = STRING2	the strings are equal
STRING1 != STRING2	the strings are not equal
INTEGER1 -eq INTEGER2	INTEGER1 is equal to INTEGER2
INTEGER1 -ge INTEGER2	INTEGER1 is greater than or equal to INTEGER2
INTEGER1 -gt INTEGER2	INTEGER1 is greater than INTEGER2
INTEGER1 -le INTEGER2	INTEGER1 is less than or equal to INTEGER2
INTEGER1 -lt INTEGER2	INTEGER1 is less than INTEGER2
INTEGER1 -ne INTEGER2	INTEGER1 is not equal to INTEGER2
FILE1 -ef FILE2	FILE1 and FILE2 have the same device and inode numbers
FILE1 -nt FILE2	FILE1 is newer (modification date) than FILE2
FILE1 -ot FILE2	FILE1 is older than FILE2
-b FILE	FILE exists and is block special
-c FILE	FILE exists and is character special
-d FILE	FILE exists and is a directory
-e FILE	FILE exists
-f FILE	FILE exists and is a regular file
-g FILE	FILE exists and is set-group-ID
-G FILE	FILE exists and is owned by the effective group ID
-h FILE	FILE exists and is a symbolic link (same as -L)
-k FILE	FILE exists and has its sticky bit set
-L FILE	FILE exists and is a symbolic link (same as -h)
-N FILE	FILE exists and has been modified since it was last read
-O FILE	FILE exists and is owned by the effective user ID
-p FILE	FILE exists and is a named pipe
-r FILE	FILE exists and read permission is granted
-s FILE	FILE exists and has a size greater than zero
-S FILE	FILE exists and is a socket
-t FD	file descriptor FD is opened on a terminal
-u FILE	FILE exists and its set-user-ID bit is set
-w FILE	FILE exists and write permission is granted
-x FILE	FILE exists and execute (or search) permission is granted

Except for -h and -L, all FILE-related tests dereference symbolic links. Beware that parentheses need to be escaped (e.g., by back‐slashes) for shells. INTEGER may also be -l STRING, which evaluates to the length of STRING.

Note

Binary -a and -o are inherently ambiguous. Use test EXPR1 && test EXPR2 or test EXPR1 || test EXPR2 instead.

Note

[ honors the --help and --version options, but test does not. test treats each of those as it treats any other nonempty STRING.

Note

Being represented on 64 bits, integers and file descriptors outside the range $[-2^{63},2^{63}[$ are intepreted as strings.

Differences with GNU test

1. Unlike GNU test, This implementation gives predecens to the -a and -o binary operators.