8d5a14301f
The "exp" builtin is undocumented, non-standard and not very useful. If exp's return value is not used, something like VAR=$(exp EXPRESSION) is equivalent to VAR=$((EXPRESSION)) except that errors in the expression are fatal and quoting special characters is not needed in the latter case. If exp's return value is used, something like if exp EXPRESSION >/dev/null can be replaced by if [ $((EXPRESSION)) -ne 0 ] with similar differences. The exp-run showed that "let" is close enough to bash's and ksh's builtin that removing it would break a few ports. Therefore, "let" remains in 9.x. PR: bin/104432 Exp-run done by: pav (with some other sh(1) changes)
93 lines
2.9 KiB
Bash
93 lines
2.9 KiB
Bash
#!/bin/sh -
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#-
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# Copyright (c) 1991, 1993
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# The Regents of the University of California. All rights reserved.
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#
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# This code is derived from software contributed to Berkeley by
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# Kenneth Almquist.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 4. Neither the name of the University nor the names of its contributors
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# may be used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# @(#)builtins.def 8.4 (Berkeley) 5/4/95
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# $FreeBSD$
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#
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# This file lists all the builtin commands. The first column is the name
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# of a C routine.
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# The -j flag specifies that this command is to be excluded from systems
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# without job control.
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# The -h flag specifies that this command is to be excluded from systems
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# based on the NO_HISTORY compile-time symbol.
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# The -s flag specifies that this is a POSIX 'special built-in' command.
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# The rest of the line specifies the command name or names used to run the
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# command. The entry for bltincmd, which is run when the user does not specify
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# a command, must come first.
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#
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# NOTE: bltincmd must come first!
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bltincmd builtin
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aliascmd alias
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bgcmd -j bg
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bindcmd bind
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breakcmd -s break -s continue
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cdcmd cd chdir
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commandcmd command
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dotcmd -s .
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echocmd echo
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evalcmd -s eval
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execcmd -s exec
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exitcmd -s exit
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letcmd let
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exportcmd -s export -s readonly
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#exprcmd expr
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falsecmd false
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fgcmd -j fg
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getoptscmd getopts
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hashcmd hash
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histcmd -h fc
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jobidcmd jobid
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jobscmd jobs
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killcmd kill
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localcmd local
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printfcmd printf
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pwdcmd pwd
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readcmd read
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returncmd -s return
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setcmd -s set
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setvarcmd setvar
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shiftcmd -s shift
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testcmd test [
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timescmd -s times
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trapcmd -s trap
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truecmd -s : true
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typecmd type
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ulimitcmd ulimit
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umaskcmd umask
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unaliascmd unalias
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unsetcmd -s unset
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waitcmd wait
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wordexpcmd wordexp
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