HP-UX Reference (11i v2 04/09) - 1 User Commands A-M (vol 1)
c
csh(1) csh(1)
noglob If set, file name expansion is inhibited. This is most useful in shell scripts that are
not dealing with file names, or after a list of file names has been obtained and
further expansions are not desirable.
nonomatch If set, it is no longer an error for a file name expansion to not match any existing
files. If there is no match, the primitive pattern is returned. It is still an error for
the primitive pattern to be malformed. For example,
’echo [’ still gives an
error.
notify If set, csh notifies you immediately (through your standard output device) of back-
ground job completions. The default is unset (indicate job completions just before
printing a prompt).
path Each word of the path variable specifies a directory in which commands are to be
sought for execution. A null word specifies your current working directory. If there
is no path variable, only full path names can be executed. When path is not set and
when users do not specify full path names,
csh searches for the command through
the directories
. (current directory) and /usr/bin.A
csh which is given nei-
ther the
-c nor the -t option normally hashes the contents of the directories in
the path variable after reading .cshrc, and each time the
path variable is
reset. If new commands are added to these directories while the shell is active, it is
necessary to execute
rehash for csh to access these new commands.
prompt This variable lets you select your own prompt character string. The prompt is
printed before each command is read from an interactive terminal input. If a
!
appears in the string, it is replaced by the current command history buffer event
number unless a preceding
\ is given. The default prompt is the percent sign (%)
for users and the # character for the super-user.
savehist The number of lines from the history list that are saved in ˜/.history when the
user logs out. Large values for savehist slow down the csh during startup.
shell This variable contains the name of the file in which the csh program resides. This
variable is used in forking shells to interpret files that have their execute bits set
but which are not executable by the system. (See the description of Non-Built-In
Command Execution ).
status This variable contains the status value returned by the last command. If the com-
mand terminated abnormally, 0200 is added to the status variable’s value. Built-in
commands which terminated abnormally return exit status 1, and all other built-in
commands set status to 0.
time This variable contains a numeric value that controls the automatic timing of com-
mands. If set, csh prints, for any command taking more than the specified
number of cpu seconds, a line of information to the standard output device giving
user, system, and real execution times plus a utilization percentage. The utilization
percentage is the ratio of user plus system times to real time. This message is
printed after the command finishes execution.
verbose This variable is set by the -v command line option. If set, the words of each com-
mand are printed on the standard output device after history substitutions have
been made.
Command and File name Substitution
The remaining substitutions, command and file name substitution, are applied selectively to the argu-
ments of built-in commands. This means that portions of expressions that are not evaluated are not sub-
jected to these expansions. For commands which are not internal to the shell, the command name is sub-
stituted separately from the argument list. This occurs very late, after input-output redirection is per-
formed, and in a child of the main shell.
Command Substitution
Command substitution is indicated by a command enclosed in grave accents (
‘...‘). The output from
such a command is normally broken into separate words at blanks, tabs and newlines, with null words
being discarded; this text then replacing the original string. Within double quotes, only newlines force
new words; blanks and tabs are preserved.
Section 1−−160 Hewlett-Packard Company − 14 − HP-UX 11i Version 2: September 2004