Manual Pages for UNIX Darwin command on man while

BUILTIN(1) BSD General Commands Manual BUILTIN(1)

NAME

bbuuiillttiinn, !!, %%, .., ::, @@, {{, }}, aalliiaass, aalllloocc, bbgg, bbiinndd, bbiinnddkkeeyy, bbrreeaakk,

bbrreeaakkssww, bbuuiillttiinnss, ccaassee, ccdd, cchhddiirr, ccoommmmaanndd, ccoommpplleettee, ccoonnttiinnuuee, ddeeffaauulltt, ddiirrss, ddoo, ddoonnee, eecchhoo, eecchhoottcc, eelliiff, eellssee, eenndd, eennddiiff, eennddssww, eessaacc, eevvaall, eexxeecc, eexxiitt, eexxppoorrtt, ffaallssee, ffcc, ffgg, ffiilleetteesstt, ffii, ffoorr, ffoorreeaacchh, ggeettooppttss, gglloobb, ggoottoo, hhaasshh, hhaasshhssttaatt, hhiissttoorryy, hhuupp, iiff, jjoobbiidd, jjoobbss, kkiillll, lliimmiitt,

llooccaall, lloogg, llooggiinn, llooggoouutt, llss-FF, nniiccee, nnoohhuupp, nnoottiiffyy, oonniinnttrr, ppooppdd,

pprriinntteennvv, ppuusshhdd, ppwwdd, rreeaadd, rreeaaddoonnllyy, rreehhaasshh, rreeppeeaatt, rreettuurrnn, sscchheedd, sseett, sseetteennvv, sseettttcc, sseettttyy, sseettvvaarr, sshhiifftt, ssoouurrccee, ssttoopp, ssuussppeenndd, sswwiittcchh, tteellllttcc, tteesstt, tthheenn, ttiimmee, ttiimmeess, ttrraapp, ttrruuee, ttyyppee, uulliimmiitt, uummaasskk, uunnaalliiaass, uunnccoommpplleettee, uunnhhaasshh, uunnlliimmiitt, uunnsseett, uunnsseetteennvv, uunnttiill, wwaaiitt,

wwhheerree, wwhhiicchh, wwhhiillee - shell built-in commands

SYNOPSIS

bbuuiillttiinn [-ooppttiioonnss] [args ...]

DESCRIPTION

Shell builtin commands are commands that can be executed within the run-

ning shell's process. Note that, in the case of csh(1) builtin commands, the command is executed in a subshell if it occurs as any component of a pipeline except the last. If a command specified to the shell contains a slash ``/'', the shell will not execute a builtin command, even if the last component of the

specified command matches the name of a builtin command. Thus, while

specifying ``eecchhoo'' causes a builtin command to be executed under shells that support the eecchhoo builtin command, specifying ``//bbiinn//eecchhoo'' or ``..//eecchhoo'' does not.

While some builtin commands may exist in more than one shell, their oper-

ation may be different under each shell which supports them. Below is a

table which lists shell builtin commands, the standard shells that sup-

port them and whether they exist as standalone utilities. Only builtin commands for the csh(1) and sh(1) shells are listed here. Consult a shell's manual page for details on the operation its builtin commands. Beware that the sh(1) manual page, at least, calls some of

these commands ``built-in commands'' and some of them ``reserved words''.

Users of other shells may need to consult an info(1) page or other sources of documentation. Commands marked ``No**'' under External do exist externally, but are implemented as scripts using a builtin command of the same name. Command External csh(1) sh(1) ! No No Yes

%% No Yes No

. No No Yes : No Yes Yes @@ No Yes Yes {{ No No Yes }} No No Yes aalliiaass No** Yes Yes aalllloocc No Yes No bbgg No** Yes Yes bbiinndd No No Yes bbiinnddkkeeyy No Yes No bbrreeaakk No Yes Yes bbrreeaakkssww No Yes No bbuuiillttiinn No No Yes bbuuiillttiinnss No Yes No ccaassee No Yes Yes ccdd No** Yes Yes cchhddiirr No Yes Yes ccoommmmaanndd No** No Yes ccoommpplleettee No Yes No ccoonnttiinnuuee No Yes Yes ddeeffaauulltt No Yes No ddiirrss No Yes No ddoo No No Yes ddoonnee No No Yes eecchhoo Yes Yes Yes eecchhoottcc No Yes No eelliiff No No Yes eellssee No Yes Yes eenndd No Yes No eennddiiff No Yes No eennddssww No Yes No eessaacc No No Yes eevvaall No Yes Yes eexxeecc No Yes Yes eexxiitt No Yes Yes eexxppoorrtt No No Yes ffaallssee Yes No Yes ffcc No** No Yes ffgg No** Yes Yes ffiilleetteesstt No Yes No ffii No No Yes ffoorr No No Yes ffoorreeaacchh No Yes No ggeettooppttss No** No Yes gglloobb No Yes No ggoottoo No Yes No hhaasshh No No Yes hhaasshhssttaatt No Yes No hhiissttoorryy No Yes No hhuupp No Yes No iiff No Yes Yes jjoobbiidd No No Yes jjoobbss No** Yes Yes kkiillll Yes Yes No lliimmiitt No Yes No llooccaall No No Yes lloogg No Yes No llooggiinn Yes Yes No llooggoouutt No Yes No

llss-FF No Yes No

nniiccee Yes Yes No nnoohhuupp Yes Yes No nnoottiiffyy No Yes No oonniinnttrr No Yes No ppooppdd No Yes No pprriinntteennvv Yes Yes No ppuusshhdd No Yes No ppwwdd Yes No Yes rreeaadd No** No Yes rreeaaddoonnllyy No No Yes rreehhaasshh No Yes No rreeppeeaatt No Yes No rreettuurrnn No No Yes sscchheedd No Yes No sseett No Yes Yes sseetteennvv No Yes No sseettttcc No Yes No sseettttyy No Yes No sseettvvaarr No No Yes sshhiifftt No Yes Yes ssoouurrccee No Yes No ssttoopp No Yes No ssuussppeenndd No Yes No sswwiittcchh No Yes No tteellllttcc No Yes No tteesstt Yes No Yes tthheenn No No Yes ttiimmee Yes Yes No ttiimmeess No No Yes ttrraapp No No Yes ttrruuee Yes No Yes ttyyppee No No Yes uulliimmiitt No No Yes uummaasskk No** Yes Yes uunnaalliiaass No** Yes Yes uunnccoommpplleettee No Yes No uunnhhaasshh No Yes No uunnlliimmiitt No Yes No uunnsseett No Yes Yes uunnsseetteennvv No Yes No uunnttiill No No Yes wwaaiitt No** Yes Yes wwhheerree No Yes No wwhhiicchh Yes Yes No wwhhiillee No Yes Yes