GNU logs - #11044, boring messages

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Subject: bug#11044: bug & RFE
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Hi,

The web bug:  the symlink to coreutils.html from index.html is missing

The RFE:  I'd like to be able to have a consistent, well-understood
line length from the fmt command:
�--width=width�
    Fill output lines up to width characters (default 75). fmt initially
    tries to make lines about 7% shorter than this, to give it room to
    balance line lengths.

That is very nice and all, but that's not what other implementations do.
BSD uses "goal" and "maximum" to specify the fuzz and "-w" says "no fuzz".
So how about an option to specify a goal with the default goal being 93%
of "-w"?  Then I can just test to see if "-g" is accepted and use it.

Thank you!

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Subject: bug#11044: Acknowledgement (bug & RFE)
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On 03/19/2012 12:46 PM, Bruce Korb wrote:
> Hi,
>=20
> The web bug:  the symlink to coreutils.html from index.html is missing

Aargh.  This was my fault, due to a recent complaint about the
coreutils.en.html symlink not working.  I had applied this commit:

> update to latest symlink conventions
>=20
> Per https://www.gnu.org/server/standards/README.webmastering.html,
> index.html is automatically created, and any link that looks like
> a translation of html can no longer be created via .symlinks, but
> must instead be done via redirections.

since according to that web page:

> As a special case, if a page with the directory's name exists, and inde=
x.html does not exist, a link will be made from index.html to the main pa=
ge.

But maybe that only happens on directories where a .symlinks file
exists, and the fact that I removed .symlinks for coreutils.en.html
broke the index.html linking?

At any rate, I'll quickly fix that by re-adding .symlinks.

As for fmt, I'll let others chime in; it's the sort of thing where a
patch speaks louder than requests.

--=20
Eric Blake   eblake@HIDDEN    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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Message sent to bug-coreutils@HIDDEN:

Subject: bug#11044: bug & RFE
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Hi Eric,

On Mon, Mar 19, 2012 at 12:34 PM, Eric Blake <eblake@HIDDEN> wrote:
> As for fmt, I'll let others chime in; it's the sort of thing where a
> patch speaks louder than requests.

A "patch, please" reply is completely fine.  Going to the trouble of
making a patch
wherein the patch is not considered is not quite so fine.  I guess I
should make it
clearer:

  would you-all accept a patch that added a "-g" option to set the goal
  column as opposed to deriving it by multiplying the width by 0.93 ?

It would permit results consistent with BSD and Plan-9 flavors of fmt.

Thanks !

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retitle 11044 RFE: fmt goal width
thanks

On 03/19/2012 02:00 PM, Bruce Korb wrote:
> Hi Eric,
>=20
> On Mon, Mar 19, 2012 at 12:34 PM, Eric Blake <eblake@HIDDEN> wrote:=

>> As for fmt, I'll let others chime in; it's the sort of thing where a
>> patch speaks louder than requests.
>=20
> A "patch, please" reply is completely fine.  Going to the trouble of
> making a patch
> wherein the patch is not considered is not quite so fine.  I guess I
> should make it
> clearer:
>=20
>   would you-all accept a patch that added a "-g" option to set the goal=

>   column as opposed to deriving it by multiplying the width by 0.93 ?

Yes - I would welcome such a patch, on the grounds of supporting a use
case currently possible in other existing implementations.  According to
http://www.manpagez.com/man/1/fmt/, there is no 'g' option, but BSD 'fmt
60 70' would operate like your proposed 'fmt -g 60 -w 70'.  In fact, it
might even be worth to teach GNU fmt about a non-option numeric argument
being treated as --width rather than as a file name.

--=20
Eric Blake   eblake@HIDDEN    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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retitle 11044 RFE: fmt goal width
thanks

On 03/19/2012 02:00 PM, Bruce Korb wrote:
> Hi Eric,
>=20
> On Mon, Mar 19, 2012 at 12:34 PM, Eric Blake <eblake@HIDDEN> wrote:=

>> As for fmt, I'll let others chime in; it's the sort of thing where a
>> patch speaks louder than requests.
>=20
> A "patch, please" reply is completely fine.  Going to the trouble of
> making a patch
> wherein the patch is not considered is not quite so fine.  I guess I
> should make it
> clearer:
>=20
>   would you-all accept a patch that added a "-g" option to set the goal=

>   column as opposed to deriving it by multiplying the width by 0.93 ?

Yes - I would welcome such a patch, on the grounds of supporting a use
case currently possible in other existing implementations.  According to
http://www.manpagez.com/man/1/fmt/, there is no 'g' option, but BSD 'fmt
60 70' would operate like your proposed 'fmt -g 60 -w 70'.  In fact, it
might even be worth to teach GNU fmt about a non-option numeric argument
being treated as --width rather than as a file name.

--=20
Eric Blake   eblake@HIDDEN    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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Hi Eric,

On Mon, Mar 19, 2012 at 1:41 PM, Eric Blake <eblake@HIDDEN> wrote:
>> =A0 would you-all accept a patch that added a "-g" option to set the goa=
l
>> =A0 column as opposed to deriving it by multiplying the width by 0.93 ?
>
> Yes - I would welcome such a patch, on the grounds of supporting a use
> case currently possible in other existing implementations. =A0According t=
o
> http://www.manpagez.com/man/1/fmt/, there is no 'g' option, but BSD 'fmt
> 60 70' would operate like your proposed 'fmt -g 60 -w 70'. =A0In fact, it
> might even be worth to teach GNU fmt about a non-option numeric argument
> being treated as --width rather than as a file name.

I thought about that and decided to not suggest it.  I don't like
conflating something
that is, in essence, a configurable setting with real operands.  I'd
prefer to suggest
"-g" to our BSD friends.  :)

Were it to be implemented in GNU's fmt, you would have to pass two tests:

1. does it match a file name?  If not,
2. is the first (or second) operand a number? (decimal only, or hex/octal, =
too?)

"Icky"

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diff --git a/src/fmt.c b/src/fmt.c
index 89d13a6..68d95f1
--- a/src/fmt.c
+++ b/src/fmt.c
@@ -68,7 +68,7 @@ typedef long int COST;
 #define SQR(n)		((n) * (n))
 #define EQUIV(n)	SQR ((COST) (n))
 
-/* Cost of a filled line n chars longer or shorter than best_width.  */
+/* Cost of a filled line n chars longer or shorter than goal_width.  */
 #define SHORT_COST(n)	EQUIV ((n) * 10)
 
 /* Cost of the difference between adjacent filled lines.  */
@@ -167,6 +167,7 @@ static void put_paragraph (WORD *finish);
 static void put_line (WORD *w, int indent);
 static void put_word (WORD *w);
 static void put_space (int space);
+static void check_for_goals (char ** argv);
 
 /* Option values.  */
 
@@ -201,7 +202,7 @@ static int prefix_lead_space;
 static int prefix_length;
 
 /* The preferred width of text lines, set to LEEWAY % less than max_width.  */
-static int best_width;
+static int goal_width;
 
 /* Dynamic variables.  */
 
@@ -286,6 +287,7 @@ Mandatory arguments to long options are mandatory for short options too.\n\
   -t, --tagged-paragraph    indentation of first line different from second\n\
   -u, --uniform-spacing     one space between words, two after sentences\n\
   -w, --width=WIDTH         maximum line width (default of 75 columns)\n\
+  -g, --goal=WIDTH          goal width (default of 93% of width)\n\
 "), stdout);
       fputs (HELP_OPTION_DESCRIPTION, stdout);
       fputs (VERSION_OPTION_DESCRIPTION, stdout);
@@ -308,6 +310,7 @@ static struct option const long_options[] =
   {"tagged-paragraph", no_argument, NULL, 't'},
   {"uniform-spacing", no_argument, NULL, 'u'},
   {"width", required_argument, NULL, 'w'},
+  {"goal", required_argument, NULL, 'g'},
   {GETOPT_HELP_OPTION_DECL},
   {GETOPT_VERSION_OPTION_DECL},
   {NULL, 0, NULL, 0},
@@ -319,6 +322,7 @@ main (int argc, char **argv)
   int optchar;
   bool ok = true;
   char const *max_width_option = NULL;
+  char const *goal_width_option = NULL;
 
   initialize_main (&argc, &argv);
   set_program_name (argv[0]);
@@ -376,6 +380,10 @@ main (int argc, char **argv)
         max_width_option = optarg;
         break;
 
+      case 'g':
+        goal_width_option = optarg;
+        break;
+
       case 'p':
         set_prefix (optarg);
         break;
@@ -398,7 +406,23 @@ main (int argc, char **argv)
       max_width = tmp;
     }
 
-  best_width = max_width * (2 * (100 - LEEWAY) + 1) / 200;
+  if (goal_width_option)
+    {
+      /* Limit goal_width to max_width.  */
+      unsigned long int tmp;
+      if (! (xstrtoul (goal_width_option, NULL, 10, &tmp, "") == LONGINT_OK
+             && tmp <= max_width))
+        error (EXIT_FAILURE, 0, _("invalid width: %s"),
+               quote (goal_width_option));
+      goal_width = tmp;
+    }
+  else
+    {
+      goal_width = max_width * (2 * (100 - LEEWAY) + 1) / 200;
+    }
+
+  if ((max_width_option == NULL) && (goal_width_option == NULL))
+    check_for_goals (argv);
 
   if (optind == argc)
     fmt (stdin);
@@ -435,6 +459,53 @@ main (int argc, char **argv)
   exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);
 }
 
+/* Check the first two operands for being numbers without a file by that name.
+   If there are no such files and the numbers are not too big, then accept
+   them as -g and -w options, respectively.  */
+
+static void
+check_for_goals (char ** argv)
+{
+  unsigned long v;
+
+  /* see if the first operand is a number.  That means there is no file
+     by that name and the operand fully translates to a number.  */
+  char * num = argv[optind];
+  if (access (num, R_OK))
+    return;
+  errno = 0;
+  v = strtoul (num, &num, 0);
+  if ((errno == 0) && (*num == '\0') && (v > 0) && (v < MAXCHARS/2))
+    goal_width = v;
+  else
+    return;
+  optind++;
+
+  /* see if the second operand is a number.  That means there is no file
+     by that name and the operand fully translates to a number.  */
+  num = argv[optind];
+  if (access (num, R_OK))
+    {
+      max_width = goal_width + 10;
+      return;
+    }
+  errno = 0;
+  v = strtoul (num, &num, 0);
+  if ((errno == 0) && (*num == '\0') && (v > 0) && (v < MAXCHARS/2))
+    {
+      max_width = v;
+      if (goal_width > max_width)
+        error (EXIT_FAILURE, 0, _("goal exceeds width:  %u > %u"),
+               goal_width, max_width);
+    }
+  else
+    {
+      max_width = goal_width + 10;
+      return;
+    }
+  optind++;
+}
+
 /* Trim space from the front and back of the string P, yielding the prefix,
    and record the lengths of the prefix and the space trimmed.  */
 
@@ -924,7 +995,7 @@ line_cost (WORD *next, int len)
 
   if (next == word_limit)
     return 0;
-  n = best_width - len;
+  n = goal_width - len;
   cost = SHORT_COST (n);
   if (next->next_break != word_limit)
     {
@@ -1010,3 +1081,10 @@ put_space (int space)
       out_column++;
     }
 }
+/*
+ * Local Variables:
+ * mode: C
+ * c-file-style: "gnu"
+ * indent-tabs-mode: nil
+ * End:
+ * end of fmt.c */

--------------000904010405030900000807--

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The "T" crossings and "I" dottings ... I did the icky thing anyway.


diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 835c245..a9dabc4
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -2133,7 +2133,7 @@ These commands reformat the contents of files.
  a given number of characters (75 by default).  Synopsis:

  @example
-fmt [@var{option}]@dots{} [@var{file}]@dots{}
+fmt [@var{option}]@dots{} [@var{goal} [@var{width}]] [@var{file}]@dots{}
  @end example

  @command{fmt} reads from the specified @var{file} arguments (or standard
@@ -2144,6 +2144,13 @@ preserved in the output; successive input lines with different
  indentation are not joined; tabs are expanded on input and introduced on
  output.

+@var{goal} and @var{width} are only recognized if neither
+@var{-g}/@var{--goal} nor @var{-w}/@var{--width} have been specified; and if
+the strings represent numbers; and if the numbers do not exceed about 2,500;
+and if these strings do not match existing file names.  If @var{goal} is
+provided but @var{width} not, then @var{width} will be set to @var{goal}
+plus 10.
+
  @cindex line-breaking
  @cindex sentences and line-breaking
  @cindex Knuth, Donald E.
@@ -2203,9 +2210,16 @@ between sentences to two spaces.
  @opindex -@var{width}
  @opindex -w
  @opindex --width
-Fill output lines up to @var{width} characters (default 75).  @command{fmt}
-initially tries to make lines about 7% shorter than this, to give it
-room to balance line lengths.
+Fill output lines up to @var{width} characters (default 75).
+
+@item -@var{goal}
+@itemx -g @var{goal}
+@itemx --goal=@var{goal}
+@opindex -@var{goal}
+@opindex -g
+@opindex --goal
+@command{fmt} initially tries to make lines @var{goal} characters wide.
+By default, this is 7% shorter than @var{width}.

  @item -p @var{prefix}
  @itemx --prefix=@var{prefix}

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PING ????

-------- Original Message --------
Subject: [PATCH] fmt: optionalize line width goal
Date: Tue, 20 Mar 2012 08:29:53 -0700

BSD's implementation allows a goal specification and has a different
default goal width computation anyway.  This change adds a "-g" option
and allows the first two numeric operands to represent the goal width
and actual line width.

* src/fmt.c (main): implement the new option
(check_for_goals): new function to implement the operands
Based on BSD's and Plan-9's fmt programs.
---
  THANKS.in          |    3 ++
  doc/coreutils.texi |   23 +++++++++++--
  src/fmt.c          |   88 +++++++++++++++++++++++++++++++++++++++++++++++++--
  3 files changed, 106 insertions(+), 8 deletions(-)

diff --git a/THANKS.in b/THANKS.in
index d23f7b3..9a525c4 100644
--- a/THANKS.in
+++ b/THANKS.in
@@ -11,6 +11,8 @@ note to the bug-report mailing list (as seen at end of e.g., cp --help).
  ## is used to generate the THANKS file.  Note that numerous people listed
  ## here would have been listed as commit authors if we had been using git
  ## for version control when they contributed.
+##
+## Well, not completely true.  It misses sometimes.

  ???                                 kytek@HIDDEN
  A Costa                             agcosta@HIDDEN
@@ -97,6 +99,7 @@ Brian M. Carlson                    sandals@HIDDEN
  Brian Silverman                     bsilverman@HIDDEN
  Brian Youmans                       3diff@HIDDEN
  Britton Leo Kerin                   fsblk@HIDDEN
+Bruce Korb                          bkorb@HIDDEN
  Bruce Robertson                     brucer@HIDDEN
  Carl Johnson                        carlj@HIDDEN
  Carl Lowenstein                     cdl@HIDDEN
diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 835c245..91ca957 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -2133,7 +2133,7 @@ These commands reformat the contents of files.
  a given number of characters (75 by default).  Synopsis:

  @example
-fmt [@var{option}]@dots{} [@var{file}]@dots{}
+fmt [@var{option}]@dots{} [@var{goal} [@var{width}]] [@var{file}]@dots{}
  @end example

  @command{fmt} reads from the specified @var{file} arguments (or standard
@@ -2144,6 +2144,13 @@ preserved in the output; successive input lines with different
  indentation are not joined; tabs are expanded on input and introduced on
  output.

+@var{goal} and @var{width} are only recognized if neither
+@var{-g}/@var{--goal} nor @var{-w}/@var{--width} have been specified; and if
+the strings represent numbers; and if the numbers do not exceed about 2,500;
+and if these strings do not match existing file names.  If @var{GOAL} is
+provided but @var{width} not, then @var{width} will be set to @var{goal}
+plus 10.
+
  @cindex line-breaking
  @cindex sentences and line-breaking
  @cindex Knuth, Donald E.
@@ -2203,9 +2210,17 @@ between sentences to two spaces.
  @opindex -@var{width}
  @opindex -w
  @opindex --width
-Fill output lines up to @var{width} characters (default 75).  @command{fmt}
-initially tries to make lines about 7% shorter than this, to give it
-room to balance line lengths.
+Fill output lines up to @var{width} characters (default 75 or @var{goal} plus 10,
+if @var{goal} is provided).
+
+@item -@var{goal}
+@itemx -g @var{goal}
+@itemx --goal=@var{goal}
+@opindex -@var{goal}
+@opindex -g
+@opindex --goal
+@command{fmt} initially tries to make lines @var{goal} characters wide.
+By default, this is 7% shorter than @var{width}.

  @item -p @var{prefix}
  @itemx --prefix=@var{prefix}
diff --git a/src/fmt.c b/src/fmt.c
index 89d13a6..95ae149 100644
--- a/src/fmt.c
+++ b/src/fmt.c
@@ -68,7 +68,7 @@ typedef long int COST;
  #define SQR(n)		((n) * (n))
  #define EQUIV(n)	SQR ((COST) (n))

-/* Cost of a filled line n chars longer or shorter than best_width.  */
+/* Cost of a filled line n chars longer or shorter than goal_width.  */
  #define SHORT_COST(n)	EQUIV ((n) * 10)

  /* Cost of the difference between adjacent filled lines.  */
@@ -167,6 +167,7 @@ static void put_paragraph (WORD *finish);
  static void put_line (WORD *w, int indent);
  static void put_word (WORD *w);
  static void put_space (int space);
+static void check_for_goals (char ** argv);

  /* Option values.  */

@@ -201,7 +202,7 @@ static int prefix_lead_space;
  static int prefix_length;

  /* The preferred width of text lines, set to LEEWAY % less than max_width.  */
-static int best_width;
+static int goal_width;

  /* Dynamic variables.  */

@@ -286,6 +287,7 @@ Mandatory arguments to long options are mandatory for short options too.\n\
    -t, --tagged-paragraph    indentation of first line different from second\n\
    -u, --uniform-spacing     one space between words, two after sentences\n\
    -w, --width=WIDTH         maximum line width (default of 75 columns)\n\
+  -g, --goal=WIDTH          goal width (default of 93% of width)\n\
  "), stdout);
        fputs (HELP_OPTION_DESCRIPTION, stdout);
        fputs (VERSION_OPTION_DESCRIPTION, stdout);
@@ -308,6 +310,7 @@ static struct option const long_options[] =
    {"tagged-paragraph", no_argument, NULL, 't'},
    {"uniform-spacing", no_argument, NULL, 'u'},
    {"width", required_argument, NULL, 'w'},
+  {"goal", required_argument, NULL, 'g'},
    {GETOPT_HELP_OPTION_DECL},
    {GETOPT_VERSION_OPTION_DECL},
    {NULL, 0, NULL, 0},
@@ -319,6 +322,7 @@ main (int argc, char **argv)
    int optchar;
    bool ok = true;
    char const *max_width_option = NULL;
+  char const *goal_width_option = NULL;

    initialize_main (&argc, &argv);
    set_program_name (argv[0]);
@@ -376,6 +380,10 @@ main (int argc, char **argv)
          max_width_option = optarg;
          break;

+      case 'g':
+        goal_width_option = optarg;
+        break;
+
        case 'p':
          set_prefix (optarg);
          break;
@@ -398,7 +406,25 @@ main (int argc, char **argv)
        max_width = tmp;
      }

-  best_width = max_width * (2 * (100 - LEEWAY) + 1) / 200;
+  if (goal_width_option)
+    {
+      /* Limit goal_width to max_width.  */
+      unsigned long int tmp;
+      if (! (xstrtoul (goal_width_option, NULL, 10, &tmp, "") == LONGINT_OK
+             && tmp <= max_width))
+        error (EXIT_FAILURE, 0, _("invalid width: %s"),
+               quote (goal_width_option));
+      goal_width = tmp;
+      if (max_width_option == NULL)
+        max_width = goal_width + 10;
+    }
+  else
+    {
+      goal_width = max_width * (2 * (100 - LEEWAY) + 1) / 200;
+    }
+
+  if ((max_width_option == NULL) && (goal_width_option == NULL))
+    check_for_goals (argv);

    if (optind == argc)
      fmt (stdin);
@@ -435,6 +461,53 @@ main (int argc, char **argv)
    exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);
  }

+/* Check the first two operands for being numbers without a file by that name.
+   If there are no such files and the numbers are not too big, then accept
+   them as -g and -w options, respectively.  */
+
+static void
+check_for_goals (char ** argv)
+{
+  unsigned long v;
+
+  /* see if the first operand is a number.  That means there is no file
+     by that name and the operand fully translates to a number.  */
+  char * num = argv[optind];
+  if ((num == NULL) || access (num, R_OK))
+    return;
+  errno = 0;
+  v = strtoul (num, &num, 0);
+  if ((errno == 0) && (*num == '\0') && (v > 0) && (v < MAXCHARS/2))
+    goal_width = v;
+  else
+    return;
+  optind++;
+
+  /* see if the second operand is a number.  That means there is no file
+     by that name and the operand fully translates to a number.  */
+  num = argv[optind];
+  if ((num == NULL) || access (num, R_OK))
+    {
+      max_width = goal_width + 10;
+      return;
+    }
+  errno = 0;
+  v = strtoul (num, &num, 0);
+  if ((errno == 0) && (*num == '\0') && (v > 0) && (v < MAXCHARS/2))
+    {
+      max_width = v;
+      if (goal_width > max_width)
+        error (EXIT_FAILURE, 0, _("goal exceeds width:  %u > %u"),
+               goal_width, max_width);
+    }
+  else
+    {
+      max_width = goal_width + 10;
+      return;
+    }
+  optind++;
+}
+
  /* Trim space from the front and back of the string P, yielding the prefix,
     and record the lengths of the prefix and the space trimmed.  */

@@ -924,7 +997,7 @@ line_cost (WORD *next, int len)

    if (next == word_limit)
      return 0;
-  n = best_width - len;
+  n = goal_width - len;
    cost = SHORT_COST (n);
    if (next->next_break != word_limit)
      {
@@ -1010,3 +1083,10 @@ put_space (int space)
        out_column++;
      }
  }
+/*
+ * Local Variables:
+ * mode: C
+ * c-file-style: "gnu"
+ * indent-tabs-mode: nil
+ * End:
+ * end of fmt.c */
-- 
1.7.7

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Hi Eric,

I guess nobody is listening.

BSD's implementation allows a goal specification and has a different
default goal width computation anyway.  This change adds a "-g" option
and allows the first two numeric operands to represent the goal width
and actual line width.

* src/fmt.c (main): implement the new option
(check_for_goals): new function to implement the operands
Based on BSD's and Plan-9's fmt programs.
---
  THANKS.in          |    3 ++
  doc/coreutils.texi |   23 +++++++++++--
  src/fmt.c          |   88 +++++++++++++++++++++++++++++++++++++++++++++++++--
  3 files changed, 106 insertions(+), 8 deletions(-)

diff --git a/THANKS.in b/THANKS.in
index d23f7b3..9a525c4 100644
--- a/THANKS.in
+++ b/THANKS.in
@@ -97,6 +99,7 @@ Brian M. Carlson                    sandals@HIDDEN
  Brian Silverman                     bsilverman@HIDDEN
  Brian Youmans                       3diff@HIDDEN
  Britton Leo Kerin                   fsblk@HIDDEN
+Bruce Korb                          bkorb@HIDDEN
  Bruce Robertson                     brucer@HIDDEN
  Carl Johnson                        carlj@HIDDEN
  Carl Lowenstein                     cdl@HIDDEN
diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 835c245..91ca957 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -2133,7 +2133,7 @@ These commands reformat the contents of files.
  a given number of characters (75 by default).  Synopsis:

  @example
-fmt [@var{option}]@dots{} [@var{file}]@dots{}
+fmt [@var{option}]@dots{} [@var{goal} [@var{width}]] [@var{file}]@dots{}
  @end example

  @command{fmt} reads from the specified @var{file} arguments (or standard
@@ -2144,6 +2144,13 @@ preserved in the output; successive input lines with different
  indentation are not joined; tabs are expanded on input and introduced on
  output.

+@var{goal} and @var{width} are only recognized if neither
+@var{-g}/@var{--goal} nor @var{-w}/@var{--width} have been specified; and if
+the strings represent numbers; and if the numbers do not exceed about 2,500;
+and if these strings do not match existing file names.  If @var{GOAL} is
+provided but @var{width} not, then @var{width} will be set to @var{goal}
+plus 10.
+
  @cindex line-breaking
  @cindex sentences and line-breaking
  @cindex Knuth, Donald E.
@@ -2203,9 +2210,17 @@ between sentences to two spaces.
  @opindex -@var{width}
  @opindex -w
  @opindex --width
-Fill output lines up to @var{width} characters (default 75).  @command{fmt}
-initially tries to make lines about 7% shorter than this, to give it
-room to balance line lengths.
+Fill output lines up to @var{width} characters (default 75 or @var{goal} plus 10,
+if @var{goal} is provided).
+
+@item -@var{goal}
+@itemx -g @var{goal}
+@itemx --goal=@var{goal}
+@opindex -@var{goal}
+@opindex -g
+@opindex --goal
+@command{fmt} initially tries to make lines @var{goal} characters wide.
+By default, this is 7% shorter than @var{width}.

  @item -p @var{prefix}
  @itemx --prefix=@var{prefix}
diff --git a/src/fmt.c b/src/fmt.c
index 89d13a6..95ae149 100644
--- a/src/fmt.c
+++ b/src/fmt.c
@@ -68,7 +68,7 @@ typedef long int COST;
  #define SQR(n)        ((n) * (n))
  #define EQUIV(n)    SQR ((COST) (n))

-/* Cost of a filled line n chars longer or shorter than best_width.  */
+/* Cost of a filled line n chars longer or shorter than goal_width.  */
  #define SHORT_COST(n)    EQUIV ((n) * 10)

  /* Cost of the difference between adjacent filled lines.  */
@@ -167,6 +167,7 @@ static void put_paragraph (WORD *finish);
  static void put_line (WORD *w, int indent);
  static void put_word (WORD *w);
  static void put_space (int space);
+static void check_for_goals (char ** argv);

  /* Option values.  */

@@ -201,7 +202,7 @@ static int prefix_lead_space;
  static int prefix_length;

  /* The preferred width of text lines, set to LEEWAY % less than max_width.  */
-static int best_width;
+static int goal_width;

  /* Dynamic variables.  */

@@ -286,6 +287,7 @@ Mandatory arguments to long options are mandatory for short options too.\n\
    -t, --tagged-paragraph    indentation of first line different from second\n\
    -u, --uniform-spacing     one space between words, two after sentences\n\
    -w, --width=WIDTH         maximum line width (default of 75 columns)\n\
+  -g, --goal=WIDTH          goal width (default of 93% of width)\n\
  "), stdout);
        fputs (HELP_OPTION_DESCRIPTION, stdout);
        fputs (VERSION_OPTION_DESCRIPTION, stdout);
@@ -308,6 +310,7 @@ static struct option const long_options[] =
    {"tagged-paragraph", no_argument, NULL, 't'},
    {"uniform-spacing", no_argument, NULL, 'u'},
    {"width", required_argument, NULL, 'w'},
+  {"goal", required_argument, NULL, 'g'},
    {GETOPT_HELP_OPTION_DECL},
    {GETOPT_VERSION_OPTION_DECL},
    {NULL, 0, NULL, 0},
@@ -319,6 +322,7 @@ main (int argc, char **argv)
    int optchar;
    bool ok = true;
    char const *max_width_option = NULL;
+  char const *goal_width_option = NULL;

    initialize_main (&argc, &argv);
    set_program_name (argv[0]);
@@ -376,6 +380,10 @@ main (int argc, char **argv)
          max_width_option = optarg;
          break;

+      case 'g':
+        goal_width_option = optarg;
+        break;
+
        case 'p':
          set_prefix (optarg);
          break;
@@ -398,7 +406,25 @@ main (int argc, char **argv)
        max_width = tmp;
      }

-  best_width = max_width * (2 * (100 - LEEWAY) + 1) / 200;
+  if (goal_width_option)
+    {
+      /* Limit goal_width to max_width.  */
+      unsigned long int tmp;
+      if (! (xstrtoul (goal_width_option, NULL, 10, &tmp, "") == LONGINT_OK
+             && tmp <= max_width))
+        error (EXIT_FAILURE, 0, _("invalid width: %s"),
+               quote (goal_width_option));
+      goal_width = tmp;
+      if (max_width_option == NULL)
+        max_width = goal_width + 10;
+    }
+  else
+    {
+      goal_width = max_width * (2 * (100 - LEEWAY) + 1) / 200;
+    }
+
+  if ((max_width_option == NULL) && (goal_width_option == NULL))
+    check_for_goals (argv);

    if (optind == argc)
      fmt (stdin);
@@ -435,6 +461,53 @@ main (int argc, char **argv)
    exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);
  }

+/* Check the first two operands for being numbers without a file by that name.
+   If there are no such files and the numbers are not too big, then accept
+   them as -g and -w options, respectively.  */
+
+static void
+check_for_goals (char ** argv)
+{
+  unsigned long v;
+
+  /* see if the first operand is a number.  That means there is no file
+     by that name and the operand fully translates to a number.  */
+  char * num = argv[optind];
+  if ((num == NULL) || access (num, R_OK))
+    return;
+  errno = 0;
+  v = strtoul (num, &num, 0);
+  if ((errno == 0) && (*num == '\0') && (v > 0) && (v < MAXCHARS/2))
+    goal_width = v;
+  else
+    return;
+  optind++;
+
+  /* see if the second operand is a number.  That means there is no file
+     by that name and the operand fully translates to a number.  */
+  num = argv[optind];
+  if ((num == NULL) || access (num, R_OK))
+    {
+      max_width = goal_width + 10;
+      return;
+    }
+  errno = 0;
+  v = strtoul (num, &num, 0);
+  if ((errno == 0) && (*num == '\0') && (v > 0) && (v < MAXCHARS/2))
+    {
+      max_width = v;
+      if (goal_width > max_width)
+        error (EXIT_FAILURE, 0, _("goal exceeds width:  %u > %u"),
+               goal_width, max_width);
+    }
+  else
+    {
+      max_width = goal_width + 10;
+      return;
+    }
+  optind++;
+}
+
  /* Trim space from the front and back of the string P, yielding the prefix,
     and record the lengths of the prefix and the space trimmed.  */

@@ -924,7 +997,7 @@ line_cost (WORD *next, int len)

    if (next == word_limit)
      return 0;
-  n = best_width - len;
+  n = goal_width - len;
    cost = SHORT_COST (n);
    if (next->next_break != word_limit)
      {
@@ -1010,3 +1083,10 @@ put_space (int space)
        out_column++;
      }
  }
+/*
+ * Local Variables:
+ * mode: C
+ * c-file-style: "gnu"
+ * indent-tabs-mode: nil
+ * End:
+ * end of fmt.c */
-- 
1.7.7

Message sent to bug-coreutils@HIDDEN:

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	Mar 2012 14:37:15 -0700")
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Hi Bruce,

Thanks for the patch.
[your subject also says "bug".
 Is there a bug fix somewhere in this patch? ]

Bruce Korb wrote:
> I guess nobody is listening.

If no one replies after a few days, it's best to presume
that your message requires more than casual feedback, and
that those inclined to provide feedback have not found time.

> BSD's implementation allows a goal specification and has a different
> default goal width computation anyway.  This change adds a "-g" option
> and allows the first two numeric operands to represent the goal width
> and actual line width.
>
> * src/fmt.c (main): implement the new option
> (check_for_goals): new function to implement the operands
> Based on BSD's and Plan-9's fmt programs.

...
> diff --git a/doc/coreutils.texi b/doc/coreutils.texi
> index 835c245..91ca957 100644
> --- a/doc/coreutils.texi
> +++ b/doc/coreutils.texi
> @@ -2133,7 +2133,7 @@ These commands reformat the contents of files.
>  a given number of characters (75 by default).  Synopsis:
>
>  @example
> -fmt [@var{option}]@dots{} [@var{file}]@dots{}
> +fmt [@var{option}]@dots{} [@var{goal} [@var{width}]] [@var{file}]@dots{}
>  @end example
>
>  @command{fmt} reads from the specified @var{file} arguments (or standard
> @@ -2144,6 +2144,13 @@ preserved in the output; successive input lines with different
>  indentation are not joined; tabs are expanded on input and introduced on
>  output.
>
> +@var{goal} and @var{width} are only recognized if neither
> +@var{-g}/@var{--goal} nor @var{-w}/@var{--width} have been specified; and if
> +the strings represent numbers; and if the numbers do not exceed about 2,500;
> +and if these strings do not match existing file names.  If @var{GOAL} is
> +provided but @var{width} not, then @var{width} will be set to @var{goal}
> +plus 10.

The number of conditions in the above description is a red flag.

Adding a new goal-specifying option sounds fine,
but the part that makes fmt interpret the first two arguments
as non-file-names when they happen to be numeric is dubious,
even though it's limited to when those numbers do not name files.
With that, when someone writes "fmt 1" to process their file named 1,
your modified fmt would work fine, but if somehow they run that command
in a directory without that file, fmt would act differently.
The current fmt would complain about "file not found",
while with the proposed change, it would use 1 as the goal-specifying
number and read from stdin.  That seems too surprising.

Putting it another way, with the *BSD version, "fmt 72 72" is equivalent
to "fmt -w72", most of the time.  But when run in a directory containing
a file named 72, it uses that file as input, instead.

IMHO, it is best not to emulate such an interface.

Message sent to bug-coreutils@HIDDEN:

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Hi Jim,

The bug was the sym link issue on the web site, since corrected.

On Thu, Apr 5, 2012 at 2:22 AM, Jim Meyering <jim@HIDDEN> wrote:
> If no one replies after a few days, it's best to presume
> that your message requires more than casual feedback, and
> that those inclined to provide feedback have not found time.

Sorry.  I was getting antsy because days were becoming weeks.

> The number of conditions in the above description is a red flag.

I didn't really like the maybe-its-a-number-maybe-a-file thingy either.
I did it because someone asked me to make it more BSD compatible.
I chose to then add that compatibility rather than go extra review rounds.
Oh, well.  The number of conditions was to avoid a "fmt 72" problem
when there was a file named "72".  BSD (and Plan9?) is less careful.

> Adding a new goal-specifying option sounds fine,

I'll strip down the patch.

> IMHO, it is best not to emulate such an interface.

Let's not get into vehement agreement on this and just agree to agree.

> - the fmt patch is incomplete (no doc, news, tests)

No news and no tests, but the doc was there.

Cheers - Bruce

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severity 11044 wishlist
tags 11044 patch

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From: Assaf Gordon <assafgordon@HIDDEN>
Message-ID: <48540684-e71d-327a-299a-a8d565761298@HIDDEN>
Date: Tue, 16 Oct 2018 10:20:04 -0600
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 Content preview:  severity 11044 wishlist tags 11044 patch [...] 
 Content analysis details:   (2.0 points, 10.0 required)
 pts rule name              description
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severity 11044 wishlist
tags 11044 patch

Last modified: Mon, 25 Nov 2019 12:00:02 UTC

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Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.