清单4-3。parseopts,解析命令行选项 progname=${0##*/} ## Get the name of the script without its path ## Default values verbose=0 filename= ## List of options the program will accept; ## those options that take arguments are followed by a colon optstring=f:v ## The loop calls getop...
### Parse $x (the csv data) and put the individual fields into variables NEW_UID=$(echo $x |cut-d:-f1)
### Parse $x (the csv data) and put the individual fields into variablesNEW_UID=$(echo$x|cut-d: -f1)NEW_USER=$(echo$x|cut-d: -f2)NEW_COMMENT=$(echo$x|cut-d: -f3)NEW_GROUP=$(echo$x|cut-d: -f4)NEW_ADDGROUP=$(echo$x|cut-d: -f5)NEW_HOMEDIR=$(echo$x|cut-d: -f6)...
The shell then parses these tokens into commands and other constructs, removes the special meaning of certain words or characters, expands others, redirects input and output as needed, executes the specified command, waits for the command's exit status, and makes that exit status available for f...
# Note - the global variables 'type' and 'opts' are initialised in # parse_args function. } # Parse our command line parse_args () { local no_more_args no_more_args=0 ; prog=`basename $0` ; # Decide if we are listing files or directories. ...
evalhas other uses especially when creating variables out of the blue (indirect variable references). Here is an example of one way to parse command line options that do not take parameters: # POSIX## Create option variables dynamically. Try call:## sh -x example.sh --verbose --test --...
set of symbols“#”and“!”at the beginning of the script. We know that the pound sign (#) means a line is a comment. However, with she-bang, the program interpreter of Unix-like systems will parse the rest of the first line into interpreter instructions. In this case, when writing#...
$ chmod +x parse-command-line-args.sh $ ./parse-command-line-args.sh -a Processing option 'a' $ ./parse-command-line-args.sh -c test-value Processing option 'c' with 'test-value' argument $ ./parse-command-line-args.sh -ab Processing option 'a' Processing option 'b'Copy 2.3. ...
curl_auth.sh - shortens curl command by auto-loading your OAuth2 / JWT API token or username & password from environment variables or interactive starred password prompt through a ram file descriptor to avoid placing them on the command line (which would expose your credentials in the process ...
name would be expected,bashuses the value of that variable ($PROG) as the command to run. It parses the command line, substitutes the values of its variables, and takes the result of all the substitutions and treats that as the command line, as if it had been typed that way verbatim....