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cshrc is executed.−XIs to −x as −V is to −v.After processing of flag arguments, if arguments remain but none of the −c, −i, −s, or −t options weregiven, the first argument is taken as the name of a file of commands to be executed. A ‘\’ may be used to escape the newline at the end ofthis line and continue onto another line.−vCauses the verbose variable to be set, with the effect that command input is echoed after historysubstitution.−xCauses the echo variable to be set, so that commands are echoed immediately before execution.−VCauses the verbose variable to be set even before. This aids in syntactic checking of shell scripts.−sCommand input is taken from the standard input.−tA single line of input is read and executed. Any remaining arguments are placed in argv.−eThe shell exits if any invoked command terminates abnormally or yields a non-zero exit status.−fThe shell will start faster, because it will neither search for nor execute commands from the file.cshrc in the invoker’s home directory.−iThe shell is interactive and prompts for its top-level input, even if it appears not to be a terminal.Shells are interactive without this option if their inputs and outputs are terminals.−lThe shell is a login shell (only applicable if −l is the only flag specified).−nCommands are parsed, but not executed. The shell willnot run a set-user ID script without this option.−cCommands are read from the (single) following argument which must be present. Thismay be used to pass options to a shell script without confusion or possible subterfuge. The remaining arguments will not be interpreted as shell options.
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A login shell also can be specified by invoking the shell with the ‘ −l’ flag as the only argument.The rest of the flag arguments are interpreted as follows:−bThis flag forces a ‘‘break’’ from option processing, causing any further shell arguments to be treatedas non-option arguments. It is used both as an interactive login shell and a shellscript command processor.Argument list processingIf the first argument (argument 0) to the shell is ‘ −’, then this is a login shell.
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CSH ( 1 )UNIX Reference ManualCSH ( 1 )NAMEcsh − a shell (command interpreter) with C-like syntaxSYNOPSIScsh csh DESCRIPTIONThe csh is a command language interpreter incorporating a history mechanism (see HistorySubstitutions), job control facilities (see Jobs), interactive file name and user name completion (seeFile Name Completion), and a C-like syntax.