diagnose too-large numbers better

Following on from commit v8.23-82-gaddae94, consistently diagnose
numbers that are too large, so as to distinguish from other errors,
and make the limits obvious.

* gl/modules/xdectoint: A new module implementing xdecto[iu]max(),
which handles the common case of parsing a bounded integer and
exiting with a diagnostic on error.
* gl/lib/xdectoimax.c: The signed variant.
* gl/lib/xdectoint.c: The parameterized implementation.
* gl/lib/xdectoint.h: The interface.
* gl/lib/xdectoumax.c: The unsigned variant.
* bootstrap.conf: Reference the new module.
* cfg.mk (exclude_file_name_regexp--sc_require_config_h_first):
Exclude the parameterized templates.
* src/csplit.c: Output EOVERFLOW or ERANGE errors if appropriate.
* src/fmt.c: Likewise.
* src/fold.c: Likewise.
* src/head.c: Likewise.
* src/ls.c: Likewise.
* src/nl.c: Likewise.
* src/nproc.c: Likewise.
* src/shred.c: Likewise.
* src/shuf.c: Likewise.
* src/stdbuf.c: Likewise.
* src/stty.c: Likewise.
* src/tail.c: Likewise.
* src/truncate.c: Likewise.
* src/split.c: Likewise.
* src/pr.c: Likewise.
* tests/pr/pr-tests.pl: Adjust to avoid matching errno diagnostic.
* tests/fmt/base.pl: Likewise.
* tests/split/l-chunk.sh: Likewise.
* tests/misc/shred-negative.sh: Likewise.
* tests/misc/tail.pl: Likewise.  Also remove the redundant
existing ERR_SUBST from test err-6.
* tests/ls/hex-option.sh: Check HEX/OCT options.
* tests/misc/shred-size.sh: Likewise.
* tests/misc/stty-row-col.sh: Likewise.

1 files changed, 8 insertions, 11 deletions

diff --git a/src/shuf.c b/src/shuf.c
index df0092b90..0678c3da6 100644
--- a/src/shuf.c
+++ b/src/shuf.c
@@ -32,6 +32,7 @@
 #include "randperm.h"
 #include "read-file.h"
 #include "stdio--.h"
+#include "xdectoint.h"
 #include "xstrtol.h"
 
 /* The official name of this program (e.g., no 'g' prefix).  */
@@ -422,7 +423,6 @@ main (int argc, char **argv)
 
       case 'i':
         {
-          unsigned long int argval = 0;
           char *p = strchr (optarg, '-');
           char const *hi_optarg = optarg;
           bool invalid = !p;
@@ -434,22 +434,19 @@ main (int argc, char **argv)
           if (p)
             {
               *p = '\0';
-              invalid = ((xstrtoul (optarg, NULL, 10, &argval, NULL)
-                          != LONGINT_OK)
-                         || SIZE_MAX < argval);
+              lo_input = xdectoumax (optarg, 0, SIZE_MAX, "",
+                                     _("invalid input range"), 0);
               *p = '-';
-              lo_input = argval;
               hi_optarg = p + 1;
             }
 
-          invalid |= ((xstrtoul (hi_optarg, NULL, 10, &argval, NULL)
-                       != LONGINT_OK)
-                      || SIZE_MAX < argval);
-          hi_input = argval;
+          hi_input = xdectoumax (hi_optarg, 0, SIZE_MAX, "",
+                                 _("invalid input range"), 0);
+
           n_lines = hi_input - lo_input + 1;
           invalid |= ((lo_input <= hi_input) == (n_lines == 0));
           if (invalid)
-            error (EXIT_FAILURE, 0, _("invalid input range %s"),
+            error (EXIT_FAILURE, errno, "%s: %s", _("invalid input range"),
                    quote (optarg));
         }
         break;
@@ -462,7 +459,7 @@ main (int argc, char **argv)
           if (e == LONGINT_OK)
             head_lines = MIN (head_lines, argval);
           else if (e != LONGINT_OVERFLOW)
-            error (EXIT_FAILURE, 0, _("invalid line count %s"),
+            error (EXIT_FAILURE, 0, _("invalid line count: %s"),
                    quote (optarg));
         }
         break;