Qshell Interpreter (qsh) - FTP Directory Listing - IBM

Options
Operands
Exit status
Examples
v -r file True if file exists and is readable.
v -s file True if file exists and has a size greater than zero.
v -S file True if file exists and is a socket.
v -t fd True if file descriptor fd is open and associated with a terminal.
v -u file True if file exists and its set user id flag is set.
v -w file True if file exists and is writable.
v -x file True if file exists and is executable. This only means that the execute bit is
on. If file is a directory, the directory can be searched.
v -z string True if the length of string is zero.
v n1 -eq n2 True if the integers are equal.
v n1 -ne n2 True if the integers are not equal.
v n1 -gt n2 True if the first integer is greater than the second integer.
v n1 -ge n2 True if the first integer is greater than or equal to the second integer.
v n1 -ltn2 True if the first integer is less than the second integer.
v n1 -le n2 True if the first integer is less than or equal to the second integer.
v string True if string is not the null string.
v string1 = string2 True if the strings are identical.
v string1 != string2 True if the strings are not identical.
The above primaries can be combined to form complex expressions using the
following operators:
v ! expr True if expr is false.
v expr1 -a expr2 True if both expressions are true.
v expr1 & expr2 True if both expressions are true.
v expr1 -o expr2 True if either expression is true.
v expr1 | expr2 True if either expression is true.
v (expr) Parentheses are for grouping.
The -a and & operators have higher precedence than the -o and | operators.
See above.
All operators and flags are separate arguments.
v 0 when expression is true.
v 1 when expression is false.
v >1 when there is an error.
1. See if /home is a directory: test -d /home
2. See if one integer is less than or equal to another: test“$index” -le “$count”
3. See if two strings are equal: test“$REPLY” = “Yes”
Chapter 4. Utilities 103