重现我正在寻找的内容的最小努力如下
/$ sleep 1h &
[1] 6564
/$ cd
~$ jobs
[1]+ Running sleep 1h & (wd: /)
当我用来jobs管理后台进程时，当工作目录（wd）与当前目录不同时也会显示。
有没有一种简单的方法可以轻松更改到此显示的工作目录？我正在使用 bash 3.2。
我不是在寻找使用awk或类似工具的包装函数，我只是在寻找内置解决方案的 shell。
答案1
如果您的目的是获取进程的工作目录，这是一种方法：
~ » jobs -l
[1] + 14308 running sleep 1h
~ » readlink /proc/14308/cwd
/home/matti-nillu
里面的以下函数.bashrc将完全按照您的要求执行
cdjob ()
{
pid=$(jobs -p $1);
d=$(readlink /proc/$pid/cwd);
cd "$d"
}
例子：
~$ sleep 1h &
[1] 15102
~$ jobs
[1]+ Running sleep 1h &
~$ cd /
/$ cdjob %1
~$
答案2
你可以做
cd /proc/$!/cwd
或者更好的是：
cd -P /proc/$!/cwd
在第一种情况下，pwd将显示工作目录为 /proc/XXXXXX/cwd 并将pwd -P显示真实的目录路径。
第二种方法将直接更改为请求路径链接到的物理目录。
答案3
那没有。
我浏览了联机帮助页SHELL BUILTIN COMMANDS的该部分bash(1)，但找不到更改为后台作业的当前工作目录的功能。
$ head -n3 shell-builtin-commands
SHELL BUILTIN COMMANDS
Unless otherwise noted, each builtin command documented in this section as accepting options preceded by - accepts -- to sig‐
nify the end of the options. The :, true, false, and test builtins do not accept options and do not treat -- specially. The
$ grep change bash-shell-builtin-commands
rent directory is searched if no file is found in PATH. If the sourcepath option to the shopt builtin command is
turned off, the PATH is not searched. If any arguments are supplied, they become the positional parameters when file‐
name is executed. Otherwise the positional parameters are un**changed**. The return status is the status of the last
command exited within the script (0 if no commands are executed), and false if filename is not found or cannot be
read.
--
Cause shell-command to be executed whenever keyseq is entered. When shell-command is executed, the shell sets
the READLINE_LINE variable to the contents of the readline line buffer and the READLINE_POINT variable to the
current location of the insertion point. If the executed command **changes** the value of READLINE_LINE or READ‐
LINE_POINT, those new values will be reflected in the editing state.
--
(see also the -P option to the set builtin command); the -L option forces symbolic links to be followed. If the -e
option is supplied with -P, and the current working directory cannot be successfully determined after a successful
directory **change**, cd will return an unsuccessful status. An argument of - is equivalent to $OLDPWD. If a non-empty
directory name from CDPATH is used, or if - is the first argument, and the directory **change** is successful, the abso‐
lute pathname of the new working directory is written to the standard output. The return value is true if the direc‐
tory was successfully **changed**; false otherwise.
command [-pVv] command [arg ...]
--
The first form lists the active jobs. The options have the following meanings:
-l List process IDs in addition to the normal information.
-n Display information only about jobs that have **changed** status since the user was last notified of their status.
-p List only the process ID of the job's process group leader.
-r Restrict output to running jobs.
--
Removes entries from the directory stack. With no arguments, removes the top directory from the stack, and performs a
cd to the new top directory. Arguments, if supplied, have the following meanings:
-n Suppresses the normal **change** of directory when removing directories from the stack, so that only the stack is
manipulated.
+n Removes the nth entry counting from the left of the list shown by dirs, starting with zero. For example:
--
If the popd command is successful, a dirs is performed as well, and the return status is 0. popd returns false if an
invalid option is encountered, the directory stack is empty, a non-existent directory stack entry is specified, or the
directory **change** fails.
printf [-v var] format [arguments]
--
pushd [-n] [dir]
Adds a directory to the top of the directory stack, or rotates the stack, making the new top of the stack the current
working directory. With no arguments, ex**changes** the top two directories and returns 0, unless the directory stack is
empty. Arguments, if supplied, have the following meanings:
-n Suppresses the normal **change** of directory when adding directories to the stack, so that only the stack is
manipulated.
+n Rotates the stack so that the nth directory (counting from the left of the list shown by dirs, starting with
--
If the pushd command is successful, a dirs is performed as well. If the first form is used, pushd returns 0 unless
the cd to dir fails. With the second form, pushd returns 0 unless the directory stack is empty, a non-existent direc‐
tory stack element is specified, or the directory **change** to the specified new current directory fails.
pwd [-LP]
--
readonly [-aAf] [-p] [name[=word] ...]
The given names are marked readonly; the values of these names may not be **changed** by subsequent assignment. If the -f
option is supplied, the functions corresponding to the names are so marked. The -a option restricts the variables to
indexed arrays; the -A option restricts the variables to associative arrays. If both options are supplied, -A takes
--
subshell environment. The ERR trap is normally not inherited in such cases.
-H Enable ! style history substitution. This option is on by default when the shell is interactive.
-P If set, the shell does not follow symbolic links when executing commands such as cd that **change** the current
working directory. It uses the physical directory structure instead. By default, bash follows the logical
chain of directories when performing commands which **change** the current directory.
-T If set, any traps on DEBUG and RETURN are inherited by shell functions, command substitutions, and commands
executed in a subshell environment. The DEBUG and RETURN traps are normally not inherited in such cases.
--
parameters are set to the args, even if some of them begin with a -.
- Signal the end of options, cause all remaining args to be assigned to the positional parameters. The -x and
-v options are turned off. If there are no args, the positional parameters remain unchanged**.
The options are off by default unless otherwise noted. Using + rather than - causes these options to be turned off.
--
shift [n]
The positional parameters from n+1 ... are renamed to $1 .... Parameters represented by the numbers $# down to $#-n+1
are unset. n must be a non-negative number less than or equal to $#. If n is 0, no parameters are **changed**. If n is
not given, it is assumed to be 1. If n is greater than $#, the positional parameters are not **changed**. The return
status is greater than zero if n is greater than $# or less than zero; otherwise 0.
--
cdable_vars
If set, an argument to the cd builtin command that is not a directory is assumed to be the name of a variable
whose value is the directory to **change** to.
cdspell If set, minor errors in the spelling of a directory component in a cd command will be corrected. The errors
checked for are transposed characters, a missing character, and one character too many. If a correction is
--
easy re-editing of multi-line commands.
compat31
If set, bash **changes** its behavior to that of version 3.1 with respect to quoted arguments to the [[ condi‐
tional command's =~ operator.
compat32
If set, bash **changes** its behavior to that of version 3.2 with respect to locale-specific string comparison
when using the [[ conditional command's < and > operators. Bash versions prior to bash-4.1 use ASCII colla‐
tion and strcmp(3); bash-4.1 and later use the current locale's collation sequence and strcoll(3).
compat40
If set, bash **changes** its behavior to that of version 4.0 with respect to locale-specific string comparison
when using the [[ conditional command's < and > operators (see previous item) and the effect of interrupting a
command list.
--
direxpand
If set, bash replaces directory names with the results of word expansion when performing filename completion.
This **changes** the contents of the readline editing buffer. If not set, bash attempts to preserve what the user
typed.
dirspell
--
login_shell
The shell sets this option if it is started as a login shell (see INVOCATION above). The value may not be
changed**.
mailwarn
If set, and a file that bash is checking for mail has been accessed since the last time it was checked, the
--
restricted_shell
The shell sets this option if it is started in restricted mode (see RESTRICTED SHELL below). The value may
not be **changed**. This is not reset when the startup files are executed, allowing the startup files to discover
whether or not a shell is restricted.
shift_verbose
--
value of the mask is printed. The -S option causes the mask to be printed in symbolic form; the default output is an
octal number. If the -p option is supplied, and mode is omitted, the output is in a form that may be reused as input.
The return status is 0 if the mode was successfully **changed** or if no mode argument was supplied, and false otherwise.
unalias [-a] [name ...]
编辑：我误解了你的问题。我以为您正在寻找一个内置命令来执行此操作。