- A non-negative decimal integer specifying the number of seconds for which to suspend execution.
- Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume of POSIX.1‐2008, Section 8.2, Internationalization Variables for the precedence of internationalization variables used to determine the values of locale categories.)
- If set to a non-empty string value, override the values of all the other internationalization variables.
- Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multi-byte characters in arguments).
- Determine the location of message catalogs for the processing of LC_MESSAGES.
- Terminate normally with a zero exit status.
- Effectively ignore the signal.
- Provide the default behavior for signals described in the ASYNCHRONOUS EVENTS section of Section 1.4, Utility Description Defaults. This could include terminating with a non-zero exit status.
- The execution was successfully suspended for at least time seconds, or a SIGALRM signal was received. See the ASYNCHRONOUS EVENTS section.
- An error occurred.
(sleep 105; command) &
while true do command sleep 37 done