exitcode library Null safety

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cantcreat → const int
A (user specified) output file cannot be created.
config → const int
Something was found in an unconfigured or misconfigured state.
dataerr → const int
The input data was incorrect in some way. This should only be used for user's data and not system files.
ioerr → const int
An error occurred while doing I/O on some file.
nohost → const int
The host specified did not exist. This is used in mail addresses or network requests.
noinput → const int
An input file (not a system file) did not exist or was not readable. This could also include errors like ``No message'' to a mailer (if it cared to catch it).
noperm → const int
You did not have sufficient permission to perform the operation. This is not intended for file system problems, which should use EX_NOINPUT or EX_CANTCREAT, but rather for higher level permissions.
nouser → const int
The user specified did not exist. This m ight be used for mail addresses or remote logins.
oserr → const int
An operating system error has been detected. This is intended to be used for such things as cannot fork'',cannot create pipe'', or the like. It includes things like getuid returning a user that does not exist in the passwd file.
osfile → const int
Some system file (e.g., /etc/passwd, /var/run/utmp, etc.) does not exist, cannot be opened, or has some sort of error (e.g., syntax error).
protocol → const int
The remote system returned something that was ``not possible'' during a protocol exchange.
software → const int
An internal software error has been detected. This should be limited to non-operating system related errors as possible.
tempfail → const int
Temporary failure, indicating something that is not really an error. In sendmail, this means that a mailer (e.g.) could not create a connection, and the request should be reattempted later.
unavailable → const int
A service is unavailable. This can occur if a support program or file does not exist. This can also be used as a catchall message when something you wanted to do doesn't work, but you don't know why.
usage → const int
The command was used incorrectly, e.g., with the wrong number of arguments, a bad flag, a bad syntax in a parameter, or whatever.