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[SCM] GNU M4 source repository branch, branch-1_4, updated. ab8d0f0e2072


From: Eric Blake
Subject: [SCM] GNU M4 source repository branch, branch-1_4, updated. ab8d0f0e20729f31f2295f4d12afda955990297e
Date: Mon, 22 Oct 2007 16:38:01 +0000

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http://git.sv.gnu.org/gitweb/?p=m4.git;a=commitdiff;h=ab8d0f0e20729f31f2295f4d12afda955990297e

The branch, branch-1_4 has been updated
       via  ab8d0f0e20729f31f2295f4d12afda955990297e (commit)
      from  75160ba9c925c305a41b9002533e0c8013fe15ed (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
commit ab8d0f0e20729f31f2295f4d12afda955990297e
Author: Eric Blake <address@hidden>
Date:   Mon Oct 22 10:27:51 2007 -0600

    Never let printf failures go undetected.
    
    * m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
    xprintf'.
    * src/m4.h: Include xprintf.h.
    * src/format.c (format): Warn on format failures.
    * src/builtin.c (ntoa): Export.
    (m4_errprint): Adjust all *printf callers.
    * src/debug.c (debug_message_prefix, trace_format): Likewise.
    * src/freeze.c (produce_frozen_state): Likewise.
    * src/input.c [DEBUG_INPUT]: Likewise.
    * src/m4.c (usage): Likewise.
    * src/m4.h (DEBUG_PRINT1, DEBUG_PRINT3, DEBUG_MESSAGE)
    (DEBUG_MESSAGE1, DEBUG_MESSAGE2): Likewise.
    * src/output.c (m4_tmpname, shipout_text, freeze_diversione):
    Likewise.
    * src/path.c [DEBUG_INCL]: Likewise.
    * src/stackovf.c (process_sigsegv) [DEBUG_STKOVF]: Likewise.
    * src/symtab.c [DEBUG_SYM]: Likewise.
    
    Signed-off-by: Eric Blake <address@hidden>

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog          |   21 +++++++++++++++++++++
 m4/gnulib-cache.m4 |    4 ++--
 src/builtin.c      |    4 ++--
 src/debug.c        |   10 ++++------
 src/format.c       |   10 +++++++---
 src/freeze.c       |   20 ++++++++++----------
 src/input.c        |   26 +++++++++++++-------------
 src/m4.c           |    8 ++++----
 src/m4.h           |   16 +++++++++-------
 src/output.c       |   26 ++++++++++++++++----------
 src/path.c         |    8 ++++----
 src/stackovf.c     |    5 +++--
 src/symtab.c       |   28 ++++++++++++++--------------
 13 files changed, 109 insertions(+), 77 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 2e4a12b..33278ae 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,24 @@
+2007-10-22  Eric Blake  <address@hidden>
+
+       Never let printf failures go undetected.
+       * m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
+       xprintf'.
+       * src/m4.h: Include xprintf.h.
+       * src/format.c (format): Warn on format failures.
+       * src/builtin.c (ntoa): Export.
+       (m4_errprint): Adjust all *printf callers.
+       * src/debug.c (debug_message_prefix, trace_format): Likewise.
+       * src/freeze.c (produce_frozen_state): Likewise.
+       * src/input.c [DEBUG_INPUT]: Likewise.
+       * src/m4.c (usage): Likewise.
+       * src/m4.h (DEBUG_PRINT1, DEBUG_PRINT3, DEBUG_MESSAGE)
+       (DEBUG_MESSAGE1, DEBUG_MESSAGE2): Likewise.
+       * src/output.c (m4_tmpname, shipout_text, freeze_diversione):
+       Likewise.
+       * src/path.c [DEBUG_INCL]: Likewise.
+       * src/stackovf.c (process_sigsegv) [DEBUG_STKOVF]: Likewise.
+       * src/symtab.c [DEBUG_SYM]: Likewise.
+
 2007-10-17  Eric Blake  <address@hidden>
 
        Fix 'm4 -F file -t undefined'.
diff --git a/m4/gnulib-cache.m4 b/m4/gnulib-cache.m4
index a4de73d..8e2002a 100644
--- a/m4/gnulib-cache.m4
+++ b/m4/gnulib-cache.m4
@@ -15,11 +15,11 @@
 
 
 # Specification in the form of a command-line invocation:
-#   gnulib-tool --import --dir=. --local-dir=local --lib=libm4 
--source-base=lib --m4-base=m4 --doc-base=doc --aux-dir=. --with-tests 
--no-libtool --macro-prefix=M4 assert avltree-oset binary-io clean-temp cloexec 
close-stream closein config-h error fdl fflush fopen-safer free fseeko gendocs 
getopt gnupload gpl-3.0 mkstemp obstack regex stdbool stdint stdlib-safer 
strtol unlocked-io vasprintf-posix verror version-etc version-etc-fsf xalloc 
xvasprintf
+#   gnulib-tool --import --dir=. --local-dir=local --lib=libm4 
--source-base=lib --m4-base=m4 --doc-base=doc --aux-dir=. --with-tests 
--no-libtool --macro-prefix=M4 assert avltree-oset binary-io clean-temp cloexec 
close-stream closein config-h error fdl fflush fopen-safer free fseeko gendocs 
getopt gnupload gpl-3.0 mkstemp obstack regex stdbool stdint stdlib-safer 
strtol unlocked-io vasprintf-posix verror version-etc version-etc-fsf xalloc 
xprintf xvasprintf
 
 # Specification in the form of a few gnulib-tool.m4 macro invocations:
 gl_LOCAL_DIR([local])
-gl_MODULES([assert avltree-oset binary-io clean-temp cloexec close-stream 
closein config-h error fdl fflush fopen-safer free fseeko gendocs getopt 
gnupload gpl-3.0 mkstemp obstack regex stdbool stdint stdlib-safer strtol 
unlocked-io vasprintf-posix verror version-etc version-etc-fsf xalloc 
xvasprintf])
+gl_MODULES([assert avltree-oset binary-io clean-temp cloexec close-stream 
closein config-h error fdl fflush fopen-safer free fseeko gendocs getopt 
gnupload gpl-3.0 mkstemp obstack regex stdbool stdint stdlib-safer strtol 
unlocked-io vasprintf-posix verror version-etc version-etc-fsf xalloc xprintf 
xvasprintf])
 gl_AVOID([])
 gl_SOURCE_BASE([lib])
 gl_M4_BASE([m4])
diff --git a/src/builtin.c b/src/builtin.c
index 75859bd..5983ac2 100644
--- a/src/builtin.c
+++ b/src/builtin.c
@@ -553,7 +553,7 @@ numeric_arg (token_data *macro, const char *arg, int 
*valuep)
 /* Digits for number to ascii conversions.  */
 static char const digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
 
-static const char *
+const char *
 ntoa (int32_t value, int radix)
 {
   bool negative;
@@ -1541,7 +1541,7 @@ m4_errprint (struct obstack *obs, int argc, token_data 
**argv)
   dump_args (obs, argc, argv, " ", false);
   obstack_1grow (obs, '\0');
   debug_flush_files ();
-  fprintf (stderr, "%s", (char *) obstack_finish (obs));
+  xfprintf (stderr, "%s", (char *) obstack_finish (obs));
   fflush (stderr);
 }
 
diff --git a/src/debug.c b/src/debug.c
index 2c4860f..c94a746 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -231,13 +231,13 @@ debug_set_output (const char *name)
 void
 debug_message_prefix (void)
 {
-  fprintf (debug, "m4debug:");
+  xfprintf (debug, "m4debug:");
   if (current_line)
   {
     if (debug_level & DEBUG_TRACE_FILE)
-      fprintf (debug, "%s:", current_file);
+      xfprintf (debug, "%s:", current_file);
     if (debug_level & DEBUG_TRACE_LINE)
-      fprintf (debug, "%d:", current_line);
+      xfprintf (debug, "%d:", current_line);
   }
   putc (' ', debug);
 }
@@ -261,7 +261,6 @@ trace_format (const char *fmt, ...)
   char ch;
 
   int d;
-  char nbuf[32];
   const char *s;
   int slen;
   int maxlen;
@@ -297,8 +296,7 @@ trace_format (const char *fmt, ...)
 
        case 'd':
          d = va_arg (args, int);
-         sprintf (nbuf, "%d", d);
-         s = nbuf;
+         s = ntoa (d, 10);
          break;
 
        default:
diff --git a/src/format.c b/src/format.c
index afb3876..0cc283a 100644
--- a/src/format.c
+++ b/src/format.c
@@ -301,10 +301,14 @@ format (struct obstack *obs, int argc, token_data **argv)
          abort();
        }
 
-      /* NULL was returned on failure, such as invalid format string.  For
-        now, just silently ignore that bad specifier.  */
+      /* NULL was returned on failure, such as invalid format string.
+        Issue a warning, then proceed.  */
       if (str == NULL)
-       continue;
+       {
+         M4ERROR ((warning_status, 0,
+                   "Warning: unable to format output for `%s'", f));
+         continue;
+       }
 
       obstack_grow (obs, str, strlen (str));
       free (str);
diff --git a/src/freeze.c b/src/freeze.c
index 89a4c35..18280f7 100644
--- a/src/freeze.c
+++ b/src/freeze.c
@@ -64,15 +64,15 @@ produce_frozen_state (const char *name)
 
   /* Write a recognizable header.  */
 
-  fprintf (file, "# This is a frozen state file generated by %s\n",
+  xfprintf (file, "# This is a frozen state file generated by %s\n",
           PACKAGE_STRING);
-  fprintf (file, "V1\n");
+  xfprintf (file, "V1\n");
 
   /* Dump quote delimiters.  */
 
   if (strcmp (lquote.string, DEF_LQUOTE) || strcmp (rquote.string, DEF_RQUOTE))
     {
-      fprintf (file, "Q%d,%d\n", (int) lquote.length, (int) rquote.length);
+      xfprintf (file, "Q%d,%d\n", (int) lquote.length, (int) rquote.length);
       fputs (lquote.string, file);
       fputs (rquote.string, file);
       fputc ('\n', file);
@@ -82,7 +82,7 @@ produce_frozen_state (const char *name)
 
   if (strcmp (bcomm.string, DEF_BCOMM) || strcmp (ecomm.string, DEF_ECOMM))
     {
-      fprintf (file, "C%d,%d\n", (int) bcomm.length, (int) ecomm.length);
+      xfprintf (file, "C%d,%d\n", (int) bcomm.length, (int) ecomm.length);
       fputs (bcomm.string, file);
       fputs (ecomm.string, file);
       fputc ('\n', file);
@@ -103,9 +103,9 @@ produce_frozen_state (const char *name)
          switch (SYMBOL_TYPE (sym))
            {
            case TOKEN_TEXT:
-             fprintf (file, "T%d,%d\n",
-                      (int) strlen (SYMBOL_NAME (sym)),
-                      (int) strlen (SYMBOL_TEXT (sym)));
+             xfprintf (file, "T%d,%d\n",
+                       (int) strlen (SYMBOL_NAME (sym)),
+                       (int) strlen (SYMBOL_TEXT (sym)));
              fputs (SYMBOL_NAME (sym), file);
              fputs (SYMBOL_TEXT (sym), file);
              fputc ('\n', file);
@@ -119,9 +119,9 @@ produce_frozen_state (const char *name)
 INTERNAL ERROR: builtin not found in builtin table!"));
                  abort ();
                }
-             fprintf (file, "F%d,%d\n",
-                      (int) strlen (SYMBOL_NAME (sym)),
-                      (int) strlen (bp->name));
+             xfprintf (file, "F%d,%d\n",
+                       (int) strlen (SYMBOL_NAME (sym)),
+                       (int) strlen (bp->name));
              fputs (SYMBOL_NAME (sym), file);
              fputs (bp->name, file);
              fputc ('\n', file);
diff --git a/src/input.c b/src/input.c
index 2da8876..7f6f87b 100644
--- a/src/input.c
+++ b/src/input.c
@@ -845,7 +845,7 @@ next_token (token_data *td, int *line)
   if (ch == CHAR_EOF)
     {
 #ifdef DEBUG_INPUT
-      fprintf (stderr, "next_token -> EOF\n");
+      xfprintf (stderr, "next_token -> EOF\n");
 #endif
       next_char ();
       return TOKEN_EOF;
@@ -855,8 +855,8 @@ next_token (token_data *td, int *line)
       init_macro_token (td);
       next_char ();
 #ifdef DEBUG_INPUT
-      fprintf (stderr, "next_token -> MACDEF (%s)\n",
-              find_builtin_by_addr (TOKEN_DATA_FUNC (td))->name);
+      xfprintf (stderr, "next_token -> MACDEF (%s)\n",
+               find_builtin_by_addr (TOKEN_DATA_FUNC (td))->name);
 #endif
       return TOKEN_MACDEF;
     }
@@ -988,8 +988,8 @@ next_token (token_data *td, int *line)
   TOKEN_DATA_ORIG_TEXT (td) = orig_text;
 #endif
 #ifdef DEBUG_INPUT
-  fprintf (stderr, "next_token -> %s (%s)\n",
-          token_type_string (type), TOKEN_DATA_TEXT (td));
+  xfprintf (stderr, "next_token -> %s (%s)\n",
+           token_type_string (type), TOKEN_DATA_TEXT (td));
 #endif
   return type;
 }
@@ -1045,7 +1045,7 @@ peek_token (void)
       }
 
 #ifdef DEBUG_INPUT
-  fprintf (stderr, "peek_token -> %s\n", token_type_string (result));
+  xfprintf (stderr, "peek_token -> %s\n", token_type_string (result));
 #endif /* DEBUG_INPUT */
   return result;
 }
@@ -1082,33 +1082,33 @@ token_type_string (token_type t)
 static void
 print_token (const char *s, token_type t, token_data *td)
 {
-  fprintf (stderr, "%s: ", s);
+  xfprintf (stderr, "%s: ", s);
   switch (t)
     {                          /* TOKSW */
     case TOKEN_OPEN:
     case TOKEN_COMMA:
     case TOKEN_CLOSE:
     case TOKEN_SIMPLE:
-      fprintf (stderr, "char:");
+      xfprintf (stderr, "char:");
       break;
 
     case TOKEN_WORD:
-      fprintf (stderr, "word:");
+      xfprintf (stderr, "word:");
       break;
 
     case TOKEN_STRING:
-      fprintf (stderr, "string:");
+      xfprintf (stderr, "string:");
       break;
 
     case TOKEN_MACDEF:
-      fprintf (stderr, "macro: %p\n", TOKEN_DATA_FUNC (td));
+      xfprintf (stderr, "macro: %p\n", TOKEN_DATA_FUNC (td));
       break;
 
     case TOKEN_EOF:
-      fprintf (stderr, "eof\n");
+      xfprintf (stderr, "eof\n");
       break;
     }
-  fprintf (stderr, "\t\"%s\"\n", TOKEN_DATA_TEXT (td));
+  xfprintf (stderr, "\t\"%s\"\n", TOKEN_DATA_TEXT (td));
 }
 
 static void M4_GNUC_UNUSED
diff --git a/src/m4.c b/src/m4.c
index daa15a8..f22788e 100644
--- a/src/m4.c
+++ b/src/m4.c
@@ -137,10 +137,10 @@ static void
 usage (int status)
 {
   if (status != EXIT_SUCCESS)
-    fprintf (stderr, "Try `%s --help' for more information.\n", program_name);
+    xfprintf (stderr, "Try `%s --help' for more information.\n", program_name);
   else
     {
-      printf ("Usage: %s [OPTION]... [FILE]...\n", program_name);
+      xprintf ("Usage: %s [OPTION]... [FILE]...\n", program_name);
       fputs ("\
 Process macros in FILEs.  If no FILE or if FILE is `-', standard input\n\
 is read.\n\
@@ -154,7 +154,7 @@ Operation modes:\n\
       --help                   display this help and exit\n\
       --version                output version information and exit\n\
 ", stdout);
-      printf ("\
+      xprintf ("\
   -E, --fatal-warnings         once: warnings become errors, twice: stop\n\
                                execution at first error\n\
   -i, --interactive            unbuffer output, ignore interrupts\n\
@@ -223,7 +223,7 @@ of directories included after any specified by `-I'.\n\
 Exit status is 0 for success, 1 for failure, 63 for frozen file version\n\
 mismatch, or whatever value was passed to the m4exit macro.\n\
 ", stdout);
-      printf ("\nReport bugs to <%s>.\n", PACKAGE_BUGREPORT);
+      xprintf ("\nReport bugs to <%s>.\n", PACKAGE_BUGREPORT);
     }
   exit (status);
 }
diff --git a/src/m4.h b/src/m4.h
index 38f9d09..a0b54f6 100644
--- a/src/m4.h
+++ b/src/m4.h
@@ -45,6 +45,7 @@
 #include "unistd--.h"
 #include "verror.h"
 #include "xalloc.h"
+#include "xprintf.h"
 #include "xvasprintf.h"
 
 /* Canonicalize UNIX recognition macros.  */
@@ -128,14 +129,14 @@ extern const char *program_name;
 
 void m4_error (int, int, const char *, ...) M4_GNUC_PRINTF(3, 4);
 void m4_error_at_line (int, int, const char *, int,
-                       const char *, ...) M4_GNUC_PRINTF(5, 6);
+                      const char *, ...) M4_GNUC_PRINTF(5, 6);
 
 #define M4ERROR(Arglist) (m4_error Arglist)
 #define M4ERROR_AT_LINE(Arglist) (m4_error_at_line Arglist)
 
 #ifdef USE_STACKOVF
 void setup_stackovf_trap (char *const *, char *const *,
-                          void (*handler) (void));
+                         void (*handler) (void));
 #endif
 
 /* File: debug.c  --- debugging and tracing function.  */
@@ -174,7 +175,7 @@ extern FILE *debug;
   do                                                           \
     {                                                          \
       if (debug != NULL)                                       \
-       fprintf (debug, Fmt, Arg1);                             \
+       xfprintf (debug, Fmt, Arg1);                            \
     }                                                          \
   while (0)
 
@@ -182,7 +183,7 @@ extern FILE *debug;
   do                                                           \
     {                                                          \
       if (debug != NULL)                                       \
-       fprintf (debug, Fmt, Arg1, Arg2, Arg3);                 \
+       xfprintf (debug, Fmt, Arg1, Arg2, Arg3);                \
     }                                                          \
   while (0)
 
@@ -192,7 +193,7 @@ extern FILE *debug;
       if (debug != NULL)                                       \
        {                                                       \
          debug_message_prefix ();                              \
-         fprintf (debug, Fmt);                                 \
+         xfprintf (debug, Fmt);                                \
          putc ('\n', debug);                                   \
        }                                                       \
     }                                                          \
@@ -204,7 +205,7 @@ extern FILE *debug;
       if (debug != NULL)                                       \
        {                                                       \
          debug_message_prefix ();                              \
-         fprintf (debug, Fmt, Arg1);                           \
+         xfprintf (debug, Fmt, Arg1);                          \
          putc ('\n', debug);                                   \
        }                                                       \
     }                                                          \
@@ -216,7 +217,7 @@ extern FILE *debug;
       if (debug != NULL)                                       \
        {                                                       \
          debug_message_prefix ();                              \
-         fprintf (debug, Fmt, Arg1, Arg2);                     \
+         xfprintf (debug, Fmt, Arg1, Arg2);                    \
          putc ('\n', debug);                                   \
        }                                                       \
     }                                                          \
@@ -422,6 +423,7 @@ void undivert_all (void);
 void expand_user_macro (struct obstack *, symbol *, int, token_data **);
 void m4_placeholder (struct obstack *, int, token_data **);
 void init_pattern_buffer (struct re_pattern_buffer *, struct re_registers *);
+const char *ntoa (int32_t, int);
 
 const builtin *find_builtin_by_addr (builtin_func *);
 const builtin *find_builtin_by_name (const char *);
diff --git a/src/output.c b/src/output.c
index b36cd81..f88fc4b 100644
--- a/src/output.c
+++ b/src/output.c
@@ -197,7 +197,9 @@ m4_tmpname (int divnum)
       free (tail);
       tail = strrchr (buffer, '-') + 1;
     }
-  sprintf (tail, "%d", divnum);
+  if (sprintf (tail, "%d", divnum) < 0)
+    M4ERROR ((EXIT_FAILURE, errno,
+             "cannot create temporary file for diversion"));
   return buffer;
 }
 
@@ -468,7 +470,6 @@ void
 shipout_text (struct obstack *obs, const char *text, int length, int line)
 {
   static bool start_of_output_line = true;
-  char linebuf[20];
   const char *cursor;
 
   /* If output goes to an obstack, merely add TEXT to it.  */
@@ -519,7 +520,7 @@ shipout_text (struct obstack *obs, const char *text, int 
length, int line)
          start_of_output_line = false;
          output_current_line++;
 #ifdef DEBUG_OUTPUT
-         fprintf (stderr, "DEBUG: line %d, cur %d, cur out %d\n",
+         xfprintf (stderr, "DEBUG: line %d, cur %d, cur out %d\n",
                   line, current_line, output_current_line);
 #endif
 
@@ -529,8 +530,13 @@ shipout_text (struct obstack *obs, const char *text, int 
length, int line)
 
          if (output_current_line != line)
            {
-             sprintf (linebuf, "#line %d", line);
-             for (cursor = linebuf; *cursor; cursor++)
+             OUTPUT_CHARACTER ('#');
+             OUTPUT_CHARACTER ('l');
+             OUTPUT_CHARACTER ('i');
+             OUTPUT_CHARACTER ('n');
+             OUTPUT_CHARACTER ('e');
+             OUTPUT_CHARACTER (' ');
+             for (cursor = ntoa (line, 10); *cursor; cursor++)
                OUTPUT_CHARACTER (*cursor);
              if (output_current_line < 1 && current_file[0] != '\0')
                {
@@ -553,7 +559,7 @@ shipout_text (struct obstack *obs, const char *text, int 
length, int line)
              start_of_output_line = false;
              output_current_line++;
 #ifdef DEBUG_OUTPUT
-             fprintf (stderr, "DEBUG: line %d, cur %d, cur out %d\n",
+             xfprintf (stderr, "DEBUG: line %d, cur %d, cur out %d\n",
                       line, current_line, output_current_line);
 #endif
            }
@@ -807,7 +813,7 @@ freeze_diversions (FILE *file)
       if (diversion->size || diversion->used)
        {
          if (diversion->size)
-           fprintf (file, "D%d,%d\n", diversion->divnum, diversion->used);
+           xfprintf (file, "D%d,%d\n", diversion->divnum, diversion->used);
          else
            {
              struct stat file_stat;
@@ -817,8 +823,8 @@ freeze_diversions (FILE *file)
              if (file_stat.st_size < 0
                  || file_stat.st_size != (unsigned long int) file_stat.st_size)
                M4ERROR ((EXIT_FAILURE, 0, "diversion too large"));
-             fprintf (file, "D%d,%lu\n", diversion->divnum,
-                      (unsigned long int) file_stat.st_size);
+             xfprintf (file, "D%d,%lu\n", diversion->divnum,
+                       (unsigned long int) file_stat.st_size);
            }
 
          insert_diversion_helper (diversion);
@@ -832,5 +838,5 @@ freeze_diversions (FILE *file)
   /* Save the active diversion number, if not already.  */
 
   if (saved_number != last_inserted)
-    fprintf (file, "D%d,0\n\n", saved_number);
+    xfprintf (file, "D%d,0\n\n", saved_number);
 }
diff --git a/src/path.c b/src/path.c
index cc08109..27ac4cc 100644
--- a/src/path.c
+++ b/src/path.c
@@ -101,7 +101,7 @@ add_include_directory (const char *dir)
   dir_list_end = incl;
 
 #ifdef DEBUG_INCL
-  fprintf (stderr, "add_include_directory (%s);\n", dir);
+  xfprintf (stderr, "add_include_directory (%s);\n", dir);
 #endif
 }
 
@@ -154,7 +154,7 @@ m4_path_search (const char *file, char **result)
       strcpy (name + incl->len + 1, file);
 
 #ifdef DEBUG_INCL
-      fprintf (stderr, "m4_path_search (%s) -- trying %s\n", file, name);
+      xfprintf (stderr, "m4_path_search (%s) -- trying %s\n", file, name);
 #endif
 
       fp = fopen (name, "r");
@@ -185,9 +185,9 @@ include_dump (void)
 {
   includes *incl;
 
-  fprintf (stderr, "include_dump:\n");
+  xfprintf (stderr, "include_dump:\n");
   for (incl = dir_list; incl != NULL; incl = incl->next)
-    fprintf (stderr, "\t%s\n", incl->dir);
+    xfprintf (stderr, "\t%s\n", incl->dir);
 }
 
 #endif /* DEBUG_INCL */
diff --git a/src/stackovf.c b/src/stackovf.c
index 775ba30..3877cd9 100644
--- a/src/stackovf.c
+++ b/src/stackovf.c
@@ -154,8 +154,9 @@ process_sigsegv (int signo, const char *p)
   {
     char buf[140];
 
-    sprintf (buf, "process_sigsegv: p=%#lx stackend=%#lx diff=%ld bot=%#lx\n",
-            (long) p, (long) stackend, (long) diff, (long) stackbot);
+    snprintf (buf, sizeof buf,
+              "process_sigsegv: p=%#lx stackend=%#lx diff=%ld bot=%#lx\n",
+              (long) p, (long) stackend, (long) diff, (long) stackbot);
     write (2, buf, strlen (buf));
   }
 #endif
diff --git a/src/symtab.c b/src/symtab.c
index 684dc56..872cfaa 100644
--- a/src/symtab.c
+++ b/src/symtab.c
@@ -56,10 +56,10 @@ show_profile (void)
   int i;
   for (i = 0; i < 5; i++)
     {
-      fprintf(stderr, "m4: lookup mode %d called %d times, %d compares, "
-             "%d misses, %lld bytes\n",
-             i, profiles[i].entry, profiles[i].comparisons,
-             profiles[i].misses, profiles[i].bytes);
+      xfprintf(stderr, "m4: lookup mode %d called %d times, %d compares, "
+              "%d misses, %lld bytes\n",
+              i, profiles[i].entry, profiles[i].comparisons,
+              profiles[i].misses, profiles[i].bytes);
     }
 }
 
@@ -371,7 +371,7 @@ symtab_debug (void)
       s = lookup_symbol (text, SYMBOL_LOOKUP);
 
       if (s == NULL)
-       printf ("Name `%s' is unknown\n", text);
+       xprintf ("Name `%s' is unknown\n", text);
 
       if (delete)
        (void) lookup_symbol (text, SYMBOL_DELETE);
@@ -387,17 +387,17 @@ symtab_print_list (int i)
   symbol *sym;
   size_t h;
 
-  printf ("Symbol dump #%d:\n", i);
+  xprintf ("Symbol dump #%d:\n", i);
   for (h = 0; h < hash_table_size; h++)
     for (sym = symtab[h]; sym != NULL; sym = sym->next)
-      printf ("\tname %s, bucket %lu, addr %p, next %p, "
-             "flags%s%s%s, pending %d\n",
-             SYMBOL_NAME (sym),
-             (unsigned long int) h, sym, SYMBOL_NEXT (sym),
-             SYMBOL_TRACED (sym) ? " traced" : "",
-             SYMBOL_SHADOWED (sym) ? " shadowed" : "",
-             SYMBOL_DELETED (sym) ? " deleted" : "",
-             SYMBOL_PENDING_EXPANSIONS (sym));
+      xprintf ("\tname %s, bucket %lu, addr %p, next %p, "
+              "flags%s%s%s, pending %d\n",
+              SYMBOL_NAME (sym),
+              (unsigned long int) h, sym, SYMBOL_NEXT (sym),
+              SYMBOL_TRACED (sym) ? " traced" : "",
+              SYMBOL_SHADOWED (sym) ? " shadowed" : "",
+              SYMBOL_DELETED (sym) ? " deleted" : "",
+              SYMBOL_PENDING_EXPANSIONS (sym));
 }
 
 #endif /* DEBUG_SYM */


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