Name

time - time command execution

Synopsis

time [-lp] utility

Description

The time utility executes and times utility. After the utility finishes, time writes the total time elapsed, the time consumed by system overhead, and the time used to execute utility to the standard error stream. Times are reported in seconds.

Available options:

-l

The contents of the rusage structure are printed.

-p

The output is formatted as specified by IEEE Std 1003.2-1992 (``POSIX.2'').

The csh(1) has its own and syntactically different builtin version of . The utility described here is available as /usr/bin/time to csh users.

Diagnostics

The time utility shall exit with one of the following values:

1-125

An error occurred in the time utility.

126

The utility was found but could not be invoked.

127

The utility could not be found.

Otherwise, the exit status of time shall be that of utility.

See Also

csh(1) , getrusage(2)

Files

/usr/include/sys/resource.h

Standards

The time utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').

Bugs

The granularity of seconds on microprocessors is crude and can result in times being reported for CPU usage which are too large by a second.

Table of Contents

• Name
• Synopsis
• Description
• Diagnostics
• See Also
• Files
• Standards
• Bugs