When cfpeek terminates, it reports the result of its invocation via its exit code. Exit code of 0 indicates normal termination. Exit code 1 indicates that not all search keys has been found. Exit codes greater than 1 indicate various error conditions. The exact cause of failure is reported on the standard error.
The exit codes are as follows:
Error parsing the input file.
The command was used incorrectly, e.g., with the wrong number of arguments, a bad option, a bad syntax in a parameter, or whatever.
The requested script file does not exist, contains syntax errors, or cannot be parsed for whatever other reason.
An internal software error has occurred. Please, report it, along with any error diagnostics produced by the program, if you ever stumble upon this error code. See Reporting Bugs, for detailed instructions.
The script file parses correctly, but does not define all the symbols
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