Bug#573287: dash: read function does not work as specified in manpage towards backslashes

2010-05-05 Thread -=}\*/{=- 
hi gerrit,

mmm... isn't the echo command an external command?...

whereis echo
echo: /bin/echo /usr/share/man/man1/echo.1.gz
/usr/share/man/man3/echo.3ncurses.gz

.. should behave the same on different shells, right?

i still went and tested your sugestion on my lenny, which gave me also
diferent results for bash and dash...

#bash:
read line  printf %s\n $line
\\ \\ \\ \\
\ \ \ \

read -r line  printf %s\n $line
\\ \\ \\ \\
\\ \\ \\ \\

#dash:
read line  printf %s\n $line
\\ \\ \\ \\


read -r line  printf %s\n $line
\\ \\ \\ \\
\\ \\ \\ \\

if the debian default shell is now dash (afaik)
this makes existing scripts unreliable and prone to error... right?

best wishes
  rui

On 4 May 2010 17:04, Gerrit Pape p...@smarden.org wrote:

 On Wed, Mar 10, 2010 at 11:02:15AM +, Rui Damas wrote:
  the bellow examples explain it:
 
  #bash:
  $ read line  echo $line
  \\ \\ \\ \\
  \ \ \ \
 
  $ read -r line  echo $line
  \\ \\
  \\ \\
 
  #dash:
  $ read line  echo $line
  \\ \\ \\ \\
  \\
 
  $ read -r line  echo $line
  \\ \\
  \ \

 Hi Rui,

 it's the 'echo $line' that recognizes the backslash, not 'read -r',
 see

  http://www.opengroup.org/onlinepubs/009695399/utilities/echo.html

 Please try

 dash -c 'read -r line  printf %s\n $line' \EOT
 \\ \\
 EOT

 Regards, Gerrit.

Bug#573287: dash: read function does not work as specified in manpage towards backslashes

2010-05-05 Thread Gerrit Pape 
found 573287 0.5.4-12
notfound 573287 0.5.5.1-4
quit

On Wed, May 05, 2010 at 07:58:51AM +0100, -=}*/{=- wrote:
 mmm... isn't the echo command an external command?...
 
 whereis echo
 echo: /bin/echo /usr/share/man/man1/echo.1.gz
 /usr/share/man/man3/echo.3ncurses.gz

It's both

$ bash -c 'type echo'
echo is a shell builtin
$ dash -c 'type echo'
echo is a shell builtin
$ which echo
/bin/echo
$ 

 .. should behave the same on different shells, right?

Unfortunately it doesn't, since ages.  That's why printf should be used
instead in portable scripts.

 i still went and tested your sugestion on my lenny, which gave me also
 diferent results for bash and dash...
 
 #bash:
 read line  printf %s\n $line
 \\ \\ \\ \\
 \ \ \ \
 
 read -r line  printf %s\n $line
 \\ \\ \\ \\
 \\ \\ \\ \\
 
 #dash:
 read line  printf %s\n $line
 \\ \\ \\ \\
 

This seems to be a bug that affects dash in Debian/stable.  It's fixed
in dash available in Debian/testing and unstable.

$ dpkg -l dash |grep ^ii
ii  dash 0.5.5.1-4
POSIX-compliant shell
$ dash -c 'read line  printf %s\n $line' \EOT
\\ \\ \\ \\
EOT
\ \ \ \
$ 

Thanks for reporting this, Gerrit.



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Bug#573287: dash: read function does not work as specified in manpage towards backslashes

2010-03-10 Thread Rui Damas 
Package: dash
Version: 0.5.5.1-3
Severity: important

the bellow examples explain it:

#bash:
$ read line  echo $line
\\ \\ \\ \\
\ \ \ \

$ read -r line  echo $line
\\ \\
\\ \\

#dash:
$ read line  echo $line
\\ \\ \\ \\
\\

$ read -r line  echo $line
\\ \\
\ \



-- System Information:
Debian Release: squeeze/sid
  APT prefers testing-proposed-updates
  APT policy: (500, 'testing-proposed-updates'), (500, 'unstable'), (500, 
'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-2-amd64 (SMP w/1 CPU core)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash

Versions of packages dash depends on:
ii  debianutils   3.2.2  Miscellaneous utilities specific t
ii  dpkg  1.15.5.6   Debian package management system
ii  libc6 2.10.2-6   Embedded GNU C Library: Shared lib

dash recommends no packages.

dash suggests no packages.

-- debconf information:
* dash/sh: true



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