csh(1)

csh(1)

. . .

breaksw

. . .

default:

. . .

breaksw

endsw Each case label (str1) is successively matched against the speci®ed string which is ®rst command and ®le name expanded. The form of the case labels is the Pattern Matching Notation with the exception that non-matching lists in bracket expressions are not supported (see regexp(5)). If none of the labels match before a default label is found, the execution begins after the default label. Each case label and the default label must appear at the beginning of a line. The breaksw command causes execution to continue after the endsw. Otherwise, control may fall through case labels and default labels as in C. If no label matches and there is no default, execution continues after the endsw.

time [ command ]

When command is not speci®ed, a summary of time used by this shell and its children is printed. If speci®ed, the simple command is timed and a time summary as described under the time variable is printed. If necessary, an extra shell is created to print the time statistic when the command completes.

umask [ value ]

The current ®le creation mask is displayed (value not speci®ed) or set to the speci®ed value. The mask is given in octal. Common values for the mask are 002, which gives all permissions to the owner and group and read and execute permissions to all others, or 022, which gives all permissions to the owner, and only read and execute permission to the group and all others. See also umask(1).

unalias pattern

All aliases whose names match the speci®ed pattern are discarded. Thus, all aliases are removed by unalias *. No error occurs if pattern does not match an existing alias.

unhash

Use of the internal hash table to speed location of executed programs is disabled.

unset pattern

All variables whose names match the speci®ed pattern are removed. Thus, all variables are removed by unset *; this has noticeably undesirable side-effects. No error occurs if pattern matches nothing.

unsetenv pattern

Removes all variables whose names match the speci®ed pattern from the environment. See also the setenv command above and printenv(1).

wait Waits for all background jobs to terminate. If the shell is interactive, an interrupt can disrupt the wait, at which time the shell prints names and job numbers of all jobs known to be outstanding.

while (expression)

. . .

end While the speci®ed expression evaluates non-zero, the commands between the while and the matching end are evaluated. break and continue can be used to terminate or continue the loop prematurely. (The while and end must appear alone on their input lines.) If the input is a terminal (i.e., not a script), prompting occurs the ®rst time through the loop as for the foreach statement.

%job Brings the speci®ed job into the foreground.

%job & Continues the speci®ed job in the background.

@

@name=expression

@name[index]=expression

The ®rst form prints the values of all the shell variables. The second form sets the speci®ed name to the value of expression. If the expression contains <, >, &, or , at least this part of the expression must be placed within parentheses. The third form assigns the value of expression to the indexth argument of name. Both name and its indexth component must already exist.

HP-UX Release 11i: December 2000

− 7 −

Section 1−135

c