Принудительное переопределение при настройке компиляции (например. CXXFLAGS и др.)

Если вы хотите быть в безопасности/обрабатывать имена файлов с пробелами, переводами строк, кавычками, обратными косыми чертами и т. д., вы должны использовать нулевые -разделители в конце:

find "$srcdir" -maxdepth 1 -type f -print0 | head -z -n 100 | xargs -0 -r -- mv -t "$destdir" --

РЕДАКТИРОВАТЬ2:ПРИМЕЧАНИЕ:если у вас нетhead -z(по какой-либо причине)вы можете заменить указанный выше head -z -n 1000наtr '\0\n' '\n\0' | head -n 1000 | tr '\0\n' '\n\0'(или см. другие способы)

-maxdepth 1не будет искать файлы в подкаталогах $srcdir, поэтому перечислены только файлы в $srcdir.
-print0будет использовать \0вместо новой строки(\n)между каждым перечисленным файлом -это помогает обрабатывать файлы, содержащие символы новой строки и пробелы, с помощью xargs.
head -zбудет считать \0завершенные (вместо новой строки(\n)завершенные )строки строками. -n 100перечислит только первые 100файлы, найденные find.
Если вы хотите увидеть, какая команда xargsбудет выполнена, добавьте-t(или --verbose).
xargs -0«Элементы ввода заканчиваются нулевым символом(\0)вместо пробела,и кавычки и обратная косая черта не являются специальными (каждый символ воспринимается буквально )"
xargs -rне запустится mv, если нет файлов для перемещения (, т.е. если findне нашел ни одного файла ).
--прекращает обработку аргументов как опций программы, подробнее здесь

Пример вывода (запускает одну команду mvи также может обрабатывать файлы с символами новой строки в имени):

$ find /tmp/t -maxdepth 1 -type f -print0 | head -z -n 100 | xargs -t -0 -r -- mv -t /tmp -- ; echo "exit codes: ${PIPESTATUS[@]}"
mv -t /tmp -- /tmp/t/file containing quotes"' then spaces /tmp/t/file containing quotes"' /tmp/t/file containing a slash n here\n /tmp/t/file containing a new line here
and continues /tmp/t/s /tmp/t/-x and -L 1. /tmp/t/of replace-str in the initi /tmp/t/-thisfile_starts_with_a_hyphen and has spaces and a -hyphen here /tmp/t/-thisfile_starts_with_a_hyphen and has spaces /tmp/t/-thisfile_starts_with_a_hyphen /tmp/t/another      with       spaces /tmp/t/one with spaces /tmp/t/c /tmp/t/a 
exit codes: 0 0 0

$ ls -1R /tmp/t
/tmp/t:
a
'another      with       spaces'
b
c
'file containing a new line here'$'\n''and continues'
'file containing a slash n here\n'
'file containing quotes"'\'''
'file containing quotes"'\'' then spaces'
'of replace-str in the initi'
'one with spaces'
s
'some dir'
-thisfile_starts_with_a_hyphen
'-thisfile_starts_with_a_hyphen and has spaces'
'-thisfile_starts_with_a_hyphen and has spaces and a -hyphen here'
'-x and -L 1.'

/tmp/t/b:
'file with spaces'

'/tmp/t/some dir':
'some file'

Дляfind:

-maxdepth levels
       Descend at most levels (a non-negative integer) levels of direc‐
       tories below the starting-points.  -maxdepth 0
        means only apply the tests and actions to  the  starting-points
       themselves.
-type c
       File is of type c:

       b      block (buffered) special

       c      character (unbuffered) special

       d      directory

       p      named pipe (FIFO)

       f      regular file

       l      symbolic link; this is never true if the -L option or the
              -follow  option is in effect, unless the symbolic link is
              broken.  If you want to search for symbolic links when -L
              is in effect, use -xtype.

       s      socket

       D      door (Solaris)
-P     Never follow symbolic links.  This  is  the  default  behaviour.
       When find examines or prints information a file, and the file is
       a symbolic link, the information used shall be  taken  from  the
       properties of the symbolic link itself.
-L     Follow symbolic links.  When find examines or prints information
       about files, the information used shall be taken from the  prop‐
       erties  of  the file to which the link points, not from the link
       itself (unless it is a broken symbolic link or find is unable to
       examine  the file to which the link points).  Use of this option
       implies -noleaf.  If you later use the -P option,  -noleaf  will
       still  be  in  effect.   If -L is in effect and find discovers a
       symbolic link to a subdirectory during its search, the subdirec‐
       tory pointed to by the symbolic link will be searched.

       When the -L option is in effect, the -type predicate will always
       match against the type of the file that a symbolic  link  points
       to rather than the link itself (unless the symbolic link is bro‐
       ken).  Actions that can cause symbolic links  to  become  broken
       while  find  is executing (for example -delete) can give rise to
       confusing behaviour.  Using -L causes  the  -lname  and  -ilname
       predicates always to return false.

Дляhead:

-n, --lines=[-]NUM
       print the first NUM lines instead of  the  first  10;  with  the
       leading '-', print all but the last NUM lines of each file
-z, --zero-terminated
       line delimiter is NUL, not newline

РЕДАКТИРОВАТЬ:Кто-то упомянул , что у них не было head -z, это версия, которую я использовал (в Fedora 25):

$ head --version
head (GNU coreutils) 8.25
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later .
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by David MacKenzie and Jim Meyering.

$ rpm -qf /usr/bin/head
coreutils-8.25-17.fc25.x86_64

Дляxargs:

-0, --null
       Input  items  are  terminated  by a null character instead of by
       whitespace, and the quotes and backslash are not special  (every
       character is taken literally).  Disables the end of file string,
       which is treated like any other  argument.   Useful  when  input
       items  might  contain  white space, quote marks, or backslashes.
       The GNU find -print0 option produces  input  suitable  for  this
       mode.
-r, --no-run-if-empty
       If the standard input does not contain any nonblanks, do not run
       the command.  Normally, the command is run once even if there is
       no input.  This option is a GNU extension.
-P max-procs, --max-procs=max-procs
       Run  up  to max-procs processes at a time; the default is 1.  If
       max-procs is 0, xargs will run as many processes as possible  at
       a  time.   Use the -n option or the -L option with -P; otherwise
       chances are that only one exec will be  done.   While  xargs  is
       running,  you  can send its process a SIGUSR1 signal to increase
       the number of commands to run simultaneously, or  a  SIGUSR2  to
       decrease  the number.  You cannot increase it above an implemen‐
       tation-defined limit (which is shown with  --show-limits).   You
       cannot  decrease  it  below  1.  xargs never terminates its com‐
       mands; when asked to decrease, it merely waits for more than one
       existing command to terminate before starting another.

       Please  note  that  it is up to the called processes to properly
       manage parallel access to shared  resources.   For  example,  if
       more  than one of them tries to print to stdout, the ouptut will
       be produced in an indeterminate order (and very likely mixed up)
       unless  the  processes  collaborate in some way to prevent this.
       Using some kind of locking scheme is one  way  to  prevent  such
       problems.   In  general, using a locking scheme will help ensure
       correct output but reduce performance.  If  you  don't  want  to
       tolerate  the  performance  difference,  simply arrange for each
       process to produce a separate output file (or otherwise use sep‐
       arate resources).
-t, --verbose
       Print  the command line on the standard error output before exe‐
       cuting it.

Дляcp:

-t, --target-directory=DIRECTORY
       copy all SOURCE arguments into DIRECTORY
-v, --verbose
       explain what is being done