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nice(3) [freebsd man page]

NICE(3) 						   BSD Library Functions Manual 						   NICE(3)

NAME
nice -- set program scheduling priority LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <unistd.h> int nice(int incr); DESCRIPTION
This interface is obsoleted by setpriority(2). The nice() function obtains the scheduling priority of the process from the system and sets it to the priority value specified in incr. The priority is a value in the range -20 to 20. The default priority is 0; lower priorities cause more favorable scheduling. Only the super- user may lower priorities. Children inherit the priority of their parent processes via fork(2). SEE ALSO
nice(1), fork(2), setpriority(2), renice(8) HISTORY
A nice() syscall appeared in Version 6 AT&T UNIX. BSD
June 4, 1993 BSD

Check Out this Related Man Page

NICE(1) 						    BSD General Commands Manual 						   NICE(1)

NAME
nice -- execute a utility with an altered scheduling priority SYNOPSIS
nice [-n increment] utility [argument ...] DESCRIPTION
nice runs utility at an altered scheduling priority. If an increment is given, it is used; otherwise an increment of 10 is assumed. The super-user can run utilities with priorities higher than normal by using a negative increment. The priority can be adjusted over a range of -20 (the highest) to 20 (the lowest). A priority of 19 or 20 will prevent a process from taking any cycles from others at nice 0 or better. Available options: -n increment A positive or negative decimal integer used to modify the system scheduling priority of utility. EXIT STATUS
The nice utility exits with one of the following values: 1-125 An error occurred in the nice utility. 126 The utility was found but could not be invoked. 127 The utility could not be found. Otherwise, the exit status of nice will be that of utility. COMPATIBILITY
The historic -increment option has been deprecated but is still supported in this implementation. SEE ALSO
csh(1), getpriority(2), setpriority(2), renice(8) STANDARDS
The nice utility conforms to IEEE Std 1003.2-1992 (``POSIX.2''). HISTORY
A nice utility appeared in Version 6 AT&T UNIX. BUGS
nice is built into csh(1) with a slightly different syntax than described here. The form 'nice +10' nices to positive nice, and 'nice -10' can be used by the super-user to give a process more of the processor. BSD
June 6, 1993 BSD

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