Um esforço mínimo para reproduzir o que estou procurando é o seguinte
/$ sleep 1h &
[1] 6564
/$ cd
~$ jobs
[1]+ Running sleep 1h & (wd: /)
Quando uso jobs para gerenciar meus processos em segundo plano, o diretório de trabalho (wd) também é exibido quando é diferente do diretório atual.
Existe uma maneira fácil de mudar facilmente para este diretório de trabalho exibido? Estou usando o bash 3.2.
Eu não estou procurando por funções de wrapper usando awk ou ferramentas similares, estou especificamente procurando por um shell construído em solução.
Se sua intenção é obter o diretório de trabalho de um processo, essa é uma maneira:
~ » jobs -l
[1] + 14308 running sleep 1h
~ » readlink /proc/14308/cwd
/home/matti-nillu
A seguinte função dentro de .bashrc , fará exatamente o que você quer
cdjob ()
{
pid=$(jobs -p $1);
d=$(readlink /proc/$pid/cwd);
cd "$d"
}
Exemplo:
~$ sleep 1h &
[1] 15102
~$ jobs
[1]+ Running sleep 1h &
~$ cd /
/$ cdjob %1
~$
Você pode fazer
cd /proc/$!/cwd
Ou melhor ainda:
cd -P /proc/$!/cwd
No primeiro caso, pwd exibirá o diretório de trabalho como / proc / XXXXXX / cwd e pwd -P exibirá o caminho real do diretório.
O segundo método será alterado diretamente para o diretório físico vinculado ao caminho solicitado.
Não há.
Passei pela seção SHELL BUILTIN COMMANDS da página bash(1) e não consegui encontrar um recurso para alterar para o diretório de trabalho atual de um trabalho em segundo plano.
$ 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 ...]
Editar: Eu não entendi sua pergunta. Eu pensei que você estava procurando por um único comando interno para executar essa ação.