GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
RedHat 5.2(Apollo) |
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test(1) |
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test − check file types and compare values
test
[expr]
test {−−help,−−version}
This documentation is no longer being maintained and may be inaccurate or incomplete. The Texinfo documentation is now the authoritative source.
This manual page documents the GNU version of test. Note that most shells have a built-in command by the same name and with similar functionality.
test
returns a status of 0 (true) or 1 (false) depending on the
evaluation of the conditional expression expr.
Expressions may be unary or binary. Unary expressions are
often used to examine the status of a file. There are string
operators and numeric comparison operators as well.
−b file
True if file exists and is block special.
−c file
True if file exists and is character special.
−d file
True if file exists and is a directory.
−e file
True if file exists
−f file
True if file exists and is a regular file.
−g file
True if file exists and is set-group-id.
−k file
True if file has its ’’sticky’’ bit set.
−L file
True if file exists and is a symbolic link.
−p file
True if file exists and is a named pipe.
−r file
True if file exists and is readable.
−s file
True if file exists and has a size greater than zero.
−S file
True if file exists and is a socket.
−t [fd]
True if fd is opened on a terminal. If fd is omitted, it defaults to 1 (standard output).
−u file
True if file exists and its set-user-id bit is set.
−w file
True if file exists and is writable.
−x file
True if file exists and is executable.
−O file
True if file exists and is owned by the effective user id.
−G file
True if file exists and is owned by the effective group id.
file1 −nt file2
True if file1 is newer (according to modification date) than file2.
file1 −ot file2
True if file1 is older than file2.
file1 −ef file2
True if file1 and file2 have the same device and inode numbers.
−z string
True if the length of string is zero.
−n string
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string |
True if the length of string is non-zero. |
string1 = string2
True if the strings are equal.
string1 != string2
True if the strings are not equal.
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! expr |
True if expr is false. |
expr1 −a expr2
True if both expr1 and expr2 are true.
expr1 −o expr2
True if either expr1 or expr2 is true.
arg1 OP arg2
OP is one of −eq, −ne, −lt, −le, −gt, or −ge. These arithmetic binary operators return true if arg1 is equal, not-equal, less-than, less-than-or-equal, greater-than, or greater-than-or-equal than arg2, respectively. arg1 and arg2 may be positive integers, negative integers, or the special expression −l string, which evaluates to the length of string.
OPTIONS
When GNU test is invoked with exactly one argument,
the following options are recognized:
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−−help |
Print a usage message on standard output and exit successfully. |
−−version
Print version information on standard output then exit successfully.
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test(1) | |