130 lines
3.4 KiB
Groff
130 lines
3.4 KiB
Groff
'\" t
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.\" (The preceding line is a note to broken versions of man to tell
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.\" them to pre-process this man page with tbl)
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.\" Man page for skill and snice.
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.\" Licensed under version 2 of the GNU General Public License.
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.\" Written by Albert Cahalan, converted to a man page by
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.\" Michael K. Johnson
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.\"
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.TH SKILL 1 "March 12, 1999" "Linux" "Linux User's Manual"
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.SH NAME
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skill, snice \- send a signal or report process status
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.SH SYNOPSIS
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.B skill
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.RI [ "signal to send" ]
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.RI [ options ]
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.I process selection criteria
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.br
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.B snice
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.RI [ "new priority" ]
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.RI [ options ]
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.I process selection criteria
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.SH DESCRIPTION
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These tools are probably obsolete and unportable. The command
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syntax is poorly defined. Consider using the killall, pkill,
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and pgrep commands instead.
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The default signal for skill is TERM. Use \-l or \-L to list available signals.
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Particularly useful signals include HUP, INT, KILL, STOP, CONT, and 0.
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Alternate signals may be specified in three ways: \-9 \-SIGKILL \-KILL.
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The default priority for snice is +4. (snice +4 ...)
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Priority numbers range from +20 (slowest) to \-20 (fastest).
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Negative priority numbers are restricted to administrative users.
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.SH "GENERAL OPTIONS"
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.TS
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lB l l.
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\-f fast mode This is not currently useful.
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\-i interactive use You will be asked to approve each action.
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\-v verbose output Display information about selected processes.
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\-w warnings enabled This is not currently useful.
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\-n no action This only displays the process ID.
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\-V show version Displays version of program.
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.TE
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.SH "PROCESS SELECTION OPTIONS"
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Selection criteria can be: terminal, user, pid, command.
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The options below may be used to ensure correct interpretation.
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Do not blame Albert for this interesting interface.
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.TS
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lB l.
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\-t The next argument is a terminal (tty or pty).
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\-u The next argument is a username.
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\-p The next argument is a process ID number.
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\-c The next argument is a command name.
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.TE
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.SH SIGNALS
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The signals listed below may be available for use with skill.
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When known, numbers and default behavior are shown.
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.TS
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lB rB lB lB
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lfCW r l l.
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Name Num Action Description
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0 0 n/a exit code indicates if a signal may be sent
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ALRM 14 exit
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HUP 1 exit
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INT 2 exit
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KILL 9 exit this signal may not be blocked
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PIPE 13 exit
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POLL exit
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PROF exit
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TERM 15 exit
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USR1 exit
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USR2 exit
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VTALRM exit
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STKFLT exit may not be implemented
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PWR ignore may exit on some systems
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WINCH ignore
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CHLD ignore
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URG ignore
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TSTP stop may interact with the shell
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TTIN stop may interact with the shell
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TTOU stop may interact with the shell
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STOP stop this signal may not be blocked
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CONT restart continue if stopped, otherwise ignore
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ABRT 6 core
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FPE 8 core
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ILL 4 core
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QUIT 3 core
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SEGV 11 core
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TRAP 5 core
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SYS core may not be implemented
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EMT core may not be implemented
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BUS core core dump may fail
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XCPU core core dump may fail
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XFSZ core core dump may fail
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.TE
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.SH EXAMPLES
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.TS
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lB lB
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lfCW l.
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Command Description
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snice seti crack +7 Slow down seti and crack
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skill \-KILL \-v /dev/pts/* Kill users on new-style PTY devices
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skill \-STOP viro lm davem Stop 3 users
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snice \-17 root bash Give priority to root's shell
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.TE
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.SH "SEE ALSO"
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.BR killall (1),
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.BR pkill (1),
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.BR kill (1),
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.BR renice (1),
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.BR nice (1),
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.BR kill (2),
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.BR signal (7)
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.SH STANDARDS
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No standards apply.
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.SH AUTHOR
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Albert Cahalan <albert@users.sf.net> wrote skill and snice in 1999 as a
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replacement for a non-free version.
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Please send bug reports to <procps@freelists.org>.
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