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The date and time written shall be adjusted so that they appear in the timezone of the
Where date shall be equivalent in format to the output of: The following shall be written to standard error when a job has been successfully Input described in the STDIN section may be written to standard output. When standard input is a terminal, prompts of unspecified format for each line of the user Specify a timezone and TZ is unset or null, an unspecified default timezone shall
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If timespec specifies a timezone, it overrides TZ. Specified by timespec or -t time relative to the timezone specified by the TZ The job shall be submitted for execution at the time Sh use the login shell from the user database any of the preceding accompanied byĪ warning diagnostic about which was chosen. Name for sh, the implementation shall do one of the following: use that shell use Variable is unset or null, sh shall be used. SHELL Determine the name of a command interpreter to be used to invoke the at-job. LC_ALL If set to a non-empty string value, override the values of all the otherĭetermine the locale for the interpretation of sequences of bytes of text data asĬharacters (for example, single-byte as opposed to multi-byte characters inĭetermine the locale that should be used to affect the format and contents ofĭiagnostic messages written to standard error and informative messages written toĭetermine the format and contents for date and time strings written by batch.ĭetermine the location of message catalogs for the processing of LC_MESSAGES. Used to determine the values of locale categories.) Internationalization Variables for the precedence of internationalization variables (See the Base Definitions volume of IEEE Std 1003.1-2001, Section 8.2, LANG Provide a default value for the internationalization variables that are unset or The following environment variables shall affect the execution of batch: User names, one per line, of users who are, respectively, authorized or denied access to The text files /usr/lib/cron/at.allow and /usr/lib/cron/at.deny shall contain zero or more The standard input shall be a text file consisting of commands acceptable to the shellĬommand language described in Shell Command Language. The at.allow andĪt.deny files shall consist of one user name per line. If only at.deny exists and is empty, global usage shall be permitted. If neither fileĮxists, only a process with the appropriate privileges shall be allowed to submit a job. If that file does not exist, the file /usr/lib/cron/at.deny shallīe checked to determine whether the user shall be denied access to batch. Users shall be permitted to use batch if their name appears in the file Submitted to the batch queue with no time constraints and shall be run by the system usingĪlgorithms, based on unspecified factors, that may vary with each invocation of batch. Where queue b is a special at queue, specifically for batch jobs. It shall be the equivalent of the command: The batch utility shall read commands from standard input and schedule them for execution Batch - schedule commands to be executed in a batch queue