[PATCH 8/9] Normalize on PATH_MAX instead of MAXPATHLEN throughout.

[Pedro Alves <palves at redhat dot com>]

With the pathmax gnulib module in place, we can use PATH_MAX
consistently throughout, instead of the current mixbag of PATH_MAX and
MAXPATHLEN uses.  It's no longer necessary to include sys/param.h
(supposedly, I can't check all ports touched here) for MAXPATHLEN.

Tested on x86_64 Fedora 17.

Also cross-built for --host=i686-w64-mingw32, and --host=i586-pc-msdosdjgpp.

gdb/
2013-06-27  Pedro Alves  <palves@redhat.com>

	* defs.h: Include "pathmax.h".
	* utils.c: Don't include sys/param.h.
	(gdb_realpath): Remove code that checks for MAXPATHLEN.
	* solib-ia64-hpux.c (ia64_hpux_handle_load_event): Use PATH_MAX
	instead of MAXPATHLEN.
	* solib-sunos.c: Don't include sys/param.h.
	* xcoffread.c: Don't include sys/param.h.
	* bsd-kvm.c: Don't include sys/param.h.
	* darwin-nat.c: Don't include sys/param.h.
	(darwin_pid_to_exec_file): Use PATH_MAX instead of MAXPATHLEN.
	* darwin-nat-info.c: Don't include sys/param.h.
	* fbsd-nat.c (fbsd_pid_to_exec_file): Use PATH_MAX instead of
	MAXPATHLEN.
	* i386obsd-nat.c: Don't include sys/param.h.
	* inf-child.c: Don't include sys/param.h.
	(inf_child_fileio_readlink): Use PATH_MAX instead of MAXPATHLEN.
	* linux-fork.c: Don't include sys/param.h.
	(fork_save_infrun_state): Use PATH_MAX instead of MAXPATHLEN.
	* linux-nat.c: Don't include sys/param.h.
	(linux_child_pid_to_exec_file, linux_proc_pending_signals)
	(linux_proc_pending_signals): Use PATH_MAX instead of MAXPATHLEN.
	* m68klinux-nat.c: Don't include sys/param.h.
	* nbsd-nat.c: Don't include sys/param.h.
	(nbsd_pid_to_exec_file): Use PATH_MAX instead of MAXPATHLEN.
	* ppc-linux-nat.c: Don't include sys/param.h.
	* rs6000-nat.c: Don't include sys/param.h.
	* spu-linux-nat.c. Don't include sys/param.h.
	* windows-nat.c: Don't include sys/param.h.
	* xtensa-linux-nat.c: Don't include sys/param.h.
	* config/i386/nm-fbsd.h: Don't include sys/param.h.

gdbserver/
2013-06-27  Pedro Alves  <palves@redhat.com>

	* server.h: Include "pathmax.h".
	* linux-low.c: Don't include sys/param.h.
	(linux_pid_exe_is_elf_64_file): Use PATH_MAX instead of
	MAXPATHLEN.
	* win32-low.c: Don't include sys/param.h.
	(win32_create_inferior): Use PATH_MAX instead of MAXPATHLEN.
---
 gdb/bsd-kvm.c             |    1 -
 gdb/config/i386/nm-fbsd.h |    4 ----
 gdb/darwin-nat-info.c     |    1 -
 gdb/darwin-nat.c          |    5 ++---
 gdb/defs.h                |    4 ++++
 gdb/fbsd-nat.c            |    4 ++--
 gdb/gdbserver/linux-low.c |    3 +--
 gdb/gdbserver/server.h    |    3 +++
 gdb/gdbserver/win32-low.c |    6 ++----
 gdb/i386obsd-nat.c        |    1 -
 gdb/inf-child.c           |    9 +++------
 gdb/linux-fork.c          |    5 ++---
 gdb/linux-nat.c           |   13 ++++++-------
 gdb/m68klinux-nat.c       |    1 -
 gdb/nbsd-nat.c            |    6 ++----
 gdb/ppc-linux-nat.c       |    1 -
 gdb/rs6000-nat.c          |    1 -
 gdb/solib-ia64-hpux.c     |    4 ++--
 gdb/solib-sunos.c         |    1 -
 gdb/spu-linux-nat.c       |    1 -
 gdb/utils.c               |   12 +-----------
 gdb/windows-nat.c         |    1 -
 gdb/xcoffread.c           |    1 -
 gdb/xtensa-linux-nat.c    |    1 -
 24 files changed, 30 insertions(+), 59 deletions(-)

diff --git a/gdb/bsd-kvm.c b/gdb/bsd-kvm.c
index 1e43ccc..dd0ef06 100644
--- a/gdb/bsd-kvm.c
+++ b/gdb/bsd-kvm.c
@@ -35,7 +35,6 @@
 #endif
 #include <paths.h>
 #include "readline/readline.h"
-#include <sys/param.h>
 #include <sys/proc.h>
 #include <sys/user.h>
 
diff --git a/gdb/config/i386/nm-fbsd.h b/gdb/config/i386/nm-fbsd.h
index 8da0bac..b25dadc 100644
--- a/gdb/config/i386/nm-fbsd.h
+++ b/gdb/config/i386/nm-fbsd.h
@@ -20,8 +20,4 @@
 #ifndef NM_FBSD_H
 #define NM_FBSD_H
 
-#ifdef HAVE_SYS_PARAM_H
-#include <sys/param.h>
-#endif
-
 #endif /* nm-fbsd.h */
diff --git a/gdb/darwin-nat-info.c b/gdb/darwin-nat-info.c
index e480cd7..bdc2889 100644
--- a/gdb/darwin-nat-info.c
+++ b/gdb/darwin-nat-info.c
@@ -35,7 +35,6 @@
 #include "gdbcmd.h"
 #include "inferior.h"
 
-#include <sys/param.h>
 #include <sys/sysctl.h>
 
 #include "darwin-nat.h"
diff --git a/gdb/darwin-nat.c b/gdb/darwin-nat.c
index cbf1f78..4f851ce 100644
--- a/gdb/darwin-nat.c
+++ b/gdb/darwin-nat.c
@@ -48,7 +48,6 @@
 #include <signal.h>
 #include <string.h>
 #include <ctype.h>
-#include <sys/param.h>
 #include <sys/sysctl.h>
 #include <sys/proc.h>
 #include <libproc.h>
@@ -2002,10 +2001,10 @@ darwin_pid_to_exec_file (int pid)
   char *path;
   int res;
 
-  path = xmalloc (MAXPATHLEN);
+  path = xmalloc (PATH_MAX);
   make_cleanup (xfree, path);
 
-  res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, MAXPATHLEN);
+  res = proc_pidinfo (pid, PROC_PIDPATHINFO, 0, path, PATH_MAX);
   if (res >= 0)
     return path;
   else
diff --git a/gdb/defs.h b/gdb/defs.h
index f90ca9d..f014976 100644
--- a/gdb/defs.h
+++ b/gdb/defs.h
@@ -53,6 +53,10 @@
 #endif
 
 #include <unistd.h>
+
+/* For gnulib's PATH_MAX.  */
+#include "pathmax.h"
+
 #include <fcntl.h>
 
 /* First include ansidecl.h so we can use the various macro definitions
diff --git a/gdb/fbsd-nat.c b/gdb/fbsd-nat.c
index be7db1d..6a362da 100644
--- a/gdb/fbsd-nat.c
+++ b/gdb/fbsd-nat.c
@@ -39,7 +39,7 @@
 char *
 fbsd_pid_to_exec_file (int pid)
 {
-  size_t len = MAXPATHLEN;
+  size_t len = PATH_MAX;
   char *buf = xcalloc (len, sizeof (char));
   char *path;
 
@@ -55,7 +55,7 @@ fbsd_pid_to_exec_file (int pid)
 #endif
 
   path = xstrprintf ("/proc/%d/file", pid);
-  if (readlink (path, buf, MAXPATHLEN - 1) == -1)
+  if (readlink (path, buf, PATH_MAX - 1) == -1)
     {
       xfree (buf);
       buf = NULL;
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index bb7298a..47ea76d 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -23,7 +23,6 @@
 
 #include "gdb_wait.h"
 #include <stdio.h>
-#include <sys/param.h>
 #include <sys/ptrace.h>
 #include "linux-ptrace.h"
 #include "linux-procfs.h"
@@ -342,7 +341,7 @@ elf_64_file_p (const char *file, unsigned int *machine)
 int
 linux_pid_exe_is_elf_64_file (int pid, unsigned int *machine)
 {
-  char file[MAXPATHLEN];
+  char file[PATH_MAX];
 
   sprintf (file, "/proc/%d/exe", pid);
   return elf_64_file_p (file, machine);
diff --git a/gdb/gdbserver/server.h b/gdb/gdbserver/server.h
index c68c651..1a1d9b2 100644
--- a/gdb/gdbserver/server.h
+++ b/gdb/gdbserver/server.h
@@ -38,6 +38,9 @@
 #endif
 #include <setjmp.h>
 
+/* For gnulib's PATH_MAX.  */
+#include "pathmax.h"
+
 #ifdef HAVE_STRING_H
 #include <string.h>
 #endif
diff --git a/gdb/gdbserver/win32-low.c b/gdb/gdbserver/win32-low.c
index d1caa73..30fd1e7 100644
--- a/gdb/gdbserver/win32-low.c
+++ b/gdb/gdbserver/win32-low.c
@@ -32,7 +32,6 @@
 #include <imagehlp.h>
 #include <tlhelp32.h>
 #include <psapi.h>
-#include <sys/param.h>
 #include <process.h>
 
 #ifndef USE_WIN32API
@@ -515,7 +514,7 @@ static int
 win32_create_inferior (char *program, char **program_args)
 {
 #ifndef USE_WIN32API
-  char real_path[MAXPATHLEN];
+  char real_path[PATH_MAX];
   char *orig_path, *new_path, *path_ptr;
 #endif
   BOOL ret;
@@ -546,8 +545,7 @@ win32_create_inferior (char *program, char **program_args)
       cygwin_conv_path_list (CCP_POSIX_TO_WIN_A, path_ptr, new_path, size);
       setenv ("PATH", new_path, 1);
      }
-  cygwin_conv_path (CCP_POSIX_TO_WIN_A, program, real_path,
-		    MAXPATHLEN);
+  cygwin_conv_path (CCP_POSIX_TO_WIN_A, program, real_path, PATH_MAX);
   program = real_path;
 #endif
 
diff --git a/gdb/i386obsd-nat.c b/gdb/i386obsd-nat.c
index aef79da..f214b64 100644
--- a/gdb/i386obsd-nat.c
+++ b/gdb/i386obsd-nat.c
@@ -22,7 +22,6 @@
 #include "regcache.h"
 #include "target.h"
 
-#include <sys/param.h>
 #include <sys/sysctl.h>
 #include <machine/frame.h>
 #include <machine/pcb.h>
diff --git a/gdb/inf-child.c b/gdb/inf-child.c
index 15d8613..f5992bb 100644
--- a/gdb/inf-child.c
+++ b/gdb/inf-child.c
@@ -32,9 +32,6 @@
 #include "gdb_wait.h"
 #include "filestuff.h"
 
-#ifdef HAVE_SYS_PARAM_H
-#include <sys/param.h>		/* for MAXPATHLEN */
-#endif
 #include <sys/types.h>
 #include <fcntl.h>
 #include <unistd.h>
@@ -344,9 +341,9 @@ static char *
 inf_child_fileio_readlink (const char *filename, int *target_errno)
 {
   /* We support readlink only on systems that also provide a compile-time
-     maximum path length (MAXPATHLEN), at least for now.  */
-#if defined (HAVE_READLINK) && defined (MAXPATHLEN)
-  char buf[MAXPATHLEN - 1];
+     maximum path length (PATH_MAX), at least for now.  */
+#if defined (HAVE_READLINK) && defined (PATH_MAX)
+  char buf[PATH_MAX];
   int len;
   char *ret;
 
diff --git a/gdb/linux-fork.c b/gdb/linux-fork.c
index cb57050..4100cb1 100644
--- a/gdb/linux-fork.c
+++ b/gdb/linux-fork.c
@@ -33,7 +33,6 @@
 
 #include <sys/ptrace.h>
 #include "gdb_wait.h"
-#include <sys/param.h>
 #include "gdb_dirent.h"
 #include <ctype.h>
 
@@ -269,7 +268,7 @@ fork_load_infrun_state (struct fork_info *fp)
 static void
 fork_save_infrun_state (struct fork_info *fp, int clobber_regs)
 {
-  char path[MAXPATHLEN];
+  char path[PATH_MAX];
   struct dirent *de;
   DIR *d;
 
@@ -283,7 +282,7 @@ fork_save_infrun_state (struct fork_info *fp, int clobber_regs)
     {
       /* Now save the 'state' (file position) of all open file descriptors.
 	 Unfortunately fork does not take care of that for us...  */
-      snprintf (path, MAXPATHLEN, "/proc/%ld/fd", (long) PIDGET (fp->ptid));
+      snprintf (path, PATH_MAX, "/proc/%ld/fd", (long) PIDGET (fp->ptid));
       if ((d = opendir (path)) != NULL)
 	{
 	  long tmp;
diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index 6ba71ba..45a6e5f 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -39,7 +39,6 @@
 #include "inf-child.h"
 #include "inf-ptrace.h"
 #include "auxv.h"
-#include <sys/param.h>		/* for MAXPATHLEN */
 #include <sys/procfs.h>		/* for elf_gregset etc.  */
 #include "elf-bfd.h"		/* for elfcore_write_* */
 #include "gregset.h"		/* for gregset */
@@ -4306,14 +4305,14 @@ linux_child_pid_to_exec_file (int pid)
 {
   char *name1, *name2;
 
-  name1 = xmalloc (MAXPATHLEN);
-  name2 = xmalloc (MAXPATHLEN);
+  name1 = xmalloc (PATH_MAX);
+  name2 = xmalloc (PATH_MAX);
   make_cleanup (xfree, name1);
   make_cleanup (xfree, name2);
-  memset (name2, 0, MAXPATHLEN);
+  memset (name2, 0, PATH_MAX);
 
   sprintf (name1, "/proc/%d/exe", pid);
-  if (readlink (name1, name2, MAXPATHLEN - 1) > 0)
+  if (readlink (name1, name2, PATH_MAX - 1) > 0)
     return name2;
   else
     return name1;
@@ -4562,7 +4561,7 @@ linux_proc_pending_signals (int pid, sigset_t *pending,
 			    sigset_t *blocked, sigset_t *ignored)
 {
   FILE *procfile;
-  char buffer[MAXPATHLEN], fname[MAXPATHLEN];
+  char buffer[PATH_MAX], fname[PATH_MAX];
   struct cleanup *cleanup;
 
   sigemptyset (pending);
@@ -4574,7 +4573,7 @@ linux_proc_pending_signals (int pid, sigset_t *pending,
     error (_("Could not open %s"), fname);
   cleanup = make_cleanup_fclose (procfile);
 
-  while (fgets (buffer, MAXPATHLEN, procfile) != NULL)
+  while (fgets (buffer, PATH_MAX, procfile) != NULL)
     {
       /* Normal queued signals are on the SigPnd line in the status
 	 file.  However, 2.6 kernels also have a "shared" pending
diff --git a/gdb/m68klinux-nat.c b/gdb/m68klinux-nat.c
index 11e8f25..5e30ad2 100644
--- a/gdb/m68klinux-nat.c
+++ b/gdb/m68klinux-nat.c
@@ -29,7 +29,6 @@
 
 #include "m68k-tdep.h"
 
-#include <sys/param.h>
 #include <sys/dir.h>
 #include <signal.h>
 #include <sys/ptrace.h>
diff --git a/gdb/nbsd-nat.c b/gdb/nbsd-nat.c
index 274ef43..324efd8 100644
--- a/gdb/nbsd-nat.c
+++ b/gdb/nbsd-nat.c
@@ -19,8 +19,6 @@
 
 #include "defs.h"
 
-#include <sys/param.h>
-
 #include "nbsd-nat.h"
 
 /* Return the name of a file that can be opened to get the symbols for
@@ -29,12 +27,12 @@
 char *
 nbsd_pid_to_exec_file (int pid)
 {
-  size_t len = MAXPATHLEN;
+  size_t len = PATH_MAX;
   char *buf = xcalloc (len, sizeof (char));
   char *path;
 
   path = xstrprintf ("/proc/%d/exe", pid);
-  if (readlink (path, buf, MAXPATHLEN - 1) == -1)
+  if (readlink (path, buf, PATH_MAX - 1) == -1)
     {
       xfree (buf);
       buf = NULL;
diff --git a/gdb/ppc-linux-nat.c b/gdb/ppc-linux-nat.c
index 1ff00a6..65d4f4a 100644
--- a/gdb/ppc-linux-nat.c
+++ b/gdb/ppc-linux-nat.c
@@ -31,7 +31,6 @@
 
 #include <stdint.h>
 #include <sys/types.h>
-#include <sys/param.h>
 #include <signal.h>
 #include <sys/user.h>
 #include <sys/ioctl.h>
diff --git a/gdb/rs6000-nat.c b/gdb/rs6000-nat.c
index 1b600f0..6769618 100644
--- a/gdb/rs6000-nat.c
+++ b/gdb/rs6000-nat.c
@@ -41,7 +41,6 @@
 #include <sys/ptrace.h>
 #include <sys/reg.h>
 
-#include <sys/param.h>
 #include <sys/dir.h>
 #include <sys/user.h>
 #include <signal.h>
diff --git a/gdb/solib-ia64-hpux.c b/gdb/solib-ia64-hpux.c
index 0a92904..98fad07 100644
--- a/gdb/solib-ia64-hpux.c
+++ b/gdb/solib-ia64-hpux.c
@@ -189,7 +189,7 @@ ia64_hpux_handle_load_event (struct regcache *regcache)
   CORE_ADDR module_desc_addr;
   ULONGEST module_desc_size;
   CORE_ADDR so_path_addr;
-  char so_path[MAXPATHLEN];
+  char so_path[PATH_MAX];
   struct load_module_desc module_desc;
   struct so_list *new_so;
 
@@ -210,7 +210,7 @@ ia64_hpux_handle_load_event (struct regcache *regcache)
              sizeof (struct load_module_desc),
 	     pulongest (module_desc_size));
 
-  read_memory_string (so_path_addr, so_path, MAXPATHLEN);
+  read_memory_string (so_path_addr, so_path, PATH_MAX);
   read_memory (module_desc_addr, (gdb_byte *) &module_desc,
 	       sizeof (module_desc));
 
diff --git a/gdb/solib-sunos.c b/gdb/solib-sunos.c
index 5863fc2..3259f8b 100644
--- a/gdb/solib-sunos.c
+++ b/gdb/solib-sunos.c
@@ -22,7 +22,6 @@
 #include <sys/types.h>
 #include <signal.h>
 #include "gdb_string.h"
-#include <sys/param.h>
 #include <fcntl.h>
 
 /* SunOS shared libs need the nlist structure.  */
diff --git a/gdb/spu-linux-nat.c b/gdb/spu-linux-nat.c
index 1fab9da..9855bac 100644
--- a/gdb/spu-linux-nat.c
+++ b/gdb/spu-linux-nat.c
@@ -34,7 +34,6 @@
 #include <sys/ptrace.h>
 #include <asm/ptrace.h>
 #include <sys/types.h>
-#include <sys/param.h>
 
 #include "spu-tdep.h"
 
diff --git a/gdb/utils.c b/gdb/utils.c
index a2015a8..01212ab 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -66,8 +66,6 @@
 
 #include "inferior.h"		/* for signed_pointer_to_address */
 
-#include <sys/param.h>		/* For MAXPATHLEN */
-
 #include "gdb_curses.h"
 
 #include "readline/readline.h"
@@ -3130,22 +3128,14 @@ gdb_realpath (const char *filename)
      path.  Use that and realpath() to canonicalize the name.  This is
      the most common case.  Note that, if there isn't a compile time
      upper bound, you want to avoid realpath() at all costs.  */
-#if defined(HAVE_REALPATH)
+#if defined (HAVE_REALPATH) && defined (PATH_MAX)
   {
-# if defined (PATH_MAX)
     char buf[PATH_MAX];
-#  define USE_REALPATH
-# elif defined (MAXPATHLEN)
-    char buf[MAXPATHLEN];
-#  define USE_REALPATH
-# endif
-# if defined (USE_REALPATH)
     const char *rp = realpath (filename, buf);
 
     if (rp == NULL)
       rp = filename;
     return xstrdup (rp);
-# endif
   }
 #endif /* HAVE_REALPATH */
 
diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index ed35801..9a0241b 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -54,7 +54,6 @@
 #include "gdb_string.h"
 #include "gdbthread.h"
 #include "gdbcmd.h"
-#include <sys/param.h>
 #include <unistd.h>
 #include "exec.h"
 #include "solist.h"
diff --git a/gdb/xcoffread.c b/gdb/xcoffread.c
index a9ce667..afe1554 100644
--- a/gdb/xcoffread.c
+++ b/gdb/xcoffread.c
@@ -26,7 +26,6 @@
 #include <ctype.h>
 #include "gdb_string.h"
 
-#include <sys/param.h>
 #ifdef HAVE_SYS_FILE_H
 #include <sys/file.h>
 #endif
diff --git a/gdb/xtensa-linux-nat.c b/gdb/xtensa-linux-nat.c
index 2ca7144..3fdaa37 100644
--- a/gdb/xtensa-linux-nat.c
+++ b/gdb/xtensa-linux-nat.c
@@ -29,7 +29,6 @@
 
 #include <stdint.h>
 #include <sys/types.h>
-#include <sys/param.h>
 #include <signal.h>
 #include <sys/user.h>
 #include <sys/ioctl.h>