I was trying to run a bash shell script in ESXi shell.
Think ESXi is posix compatible, posix compiler threw much syntax errors.
please let me know if anyone has the answer
The manual lists the changed behavior when running in POSIX mode. You should adapt your script accordingly.
The following list is what's changed when POSIX mode
is in effect:
$PATH
to find the new location. This is also available with ' shopt -s checkhash
'. Done(status)
'. Stopped(signame)
', where signame is, for example, SIGTSTP
. bg
builtin uses the required format to describe each job placed in the background, which does not include an indication of whether the job is the current or previous job. PS1
and PS2
expansions of '!'
to the history number and '!!'
to '!'
are enabled, and parameter expansion is performed on the values of PS1
and PS2
regardless of the setting of the promptvars
option. $ENV
) rather than the normal Bash files. ~/.sh_history
(this is the default value of $HISTFILE
). kill -l
' prints all the signal names on a single line, separated by spaces, without the ' SIG
' prefix. kill
builtin does not accept signal names with a ' SIG
' prefix. .
filename is not found. .
or source
builtins, or in a string processed by the eval
builtin. ${...}
expansion that appears within double quotes, single quotes are no longer special and cannot be used to quote a closing brace or other special character, unless the operator is one of those defined to perform pattern removal. In this case, they do not have to appear as matched pairs. '-'
. export
and readonly
builtin commands display their output in the format required by POSIX. trap
builtin displays signal names without the leading SIG
. trap
builtin doesn't check the first argument for a possible signal specification and revert the signal handling to the original disposition if it is, unless that argument consists solely of digits and is a valid signal number. If users want to reset the handler for a given signal to the original disposition, they should use '-'
as the first argument. .
and source
builtins do not search the current directory for the filename argument if it is not found by searching PATH
. -e
option from the parent shell. When not in POSIX mode, Bash clears the -e
option in such subshells. alias
builtin displays alias definitions, it does not display them with a leading 'alias ' unless the -p
option is supplied. set
builtin is invoked without options, it does not display shell function names and definitions. set
builtin is invoked without options, it displays variable values without quotes, unless they contain shell metacharacters, even if the result contains nonprinting characters. cd
builtin is invoked in logical mode, and the pathname constructed from $PWD
and the directory name supplied as an argument does not refer to an existing directory, cd
will fail instead of falling back to physical mode. pwd
builtin verifies that the value it prints is the same as the current directory, even if it is not asked to check the file system with the -P
option. fc
builtin does not include an indication of whether or not a history entry has been modified. fc
is ed
. $PATH
. $VISUAL
and $EDITOR
. xpg_echo
option is enabled, Bash does not attempt to interpret any arguments to echo as options. Each argument is displayed, after escape characters are converted. ulimit
builtin uses a block size of 512 bytes for the -c
and -f
options. SIGCHLD
when a trap is set on SIGCHLD
does not interrupt the wait
builtin and cause it to return immediately. The trap
command is run once for each child that exits.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.