Makefile.in (CFILES): Add calloc.c and getpwd.c.

* Makefile.in (CFILES): Add calloc.c and getpwd.c.
	(REQUIRED_OFILES): Add getpwd.o.
	(getpwd.o): Add target.

	* configure.in (AC_PREREQ): Bump to 2.13.
	(AC_CHECK_HEADERS): Add check for <sys/stat.h>.

	* getpwd.c: New file, moved here from gcc.

From-SVN: r28996

libiberty/ChangeLog

@@ -1,3 +1,14 @@
+1999-08-30  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* Makefile.in (CFILES): Add calloc.c and getpwd.c.
+	(REQUIRED_OFILES): Add getpwd.o.
+	(getpwd.o): Add target.
+
+	* configure.in (AC_PREREQ): Bump to 2.13.
+	(AC_CHECK_HEADERS): Add check for <sys/stat.h>.
+
+	* getpwd.c: New file, moved here from gcc.
+
 1999-08-25  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* cplus-dem.c (gnu_special): Cast a `size_t' to `long' when

libiberty/Makefile.in

@@ -121,8 +121,8 @@ HFILES = alloca-conf.h
 # (alphabetical), and add them to REQUIRED_OFILES or funcs in
 # configure.in.
 CFILES = asprintf.c alloca.c argv.c atexit.c basename.c bcmp.c bcopy.c \
-	bzero.c choose-temp.c clock.c concat.c cplus-dem.c fdmatch.c \
-	fnmatch.c getcwd.c getopt.c getopt1.c getpagesize.c \
+	bzero.c calloc.c choose-temp.c clock.c concat.c cplus-dem.c fdmatch.c \
+	fnmatch.c getcwd.c getpwd.c getopt.c getopt1.c getpagesize.c \
 	getruntime.c floatformat.c hex.c index.c insque.c memchr.c \
 	memcmp.c memcpy.c memmove.c memset.c mkstemps.c objalloc.c obstack.c \
 	pexecute.c putenv.c random.c rename.c rindex.c setenv.c sigsetmask.c \
@@ -133,7 +133,7 @@ CFILES = asprintf.c alloca.c argv.c atexit.c basename.c bcmp.c bcopy.c \
 
 # These are always included in the library.
 REQUIRED_OFILES = argv.o choose-temp.o concat.o cplus-dem.o \
-  fdmatch.o fnmatch.o getopt.o getopt1.o getruntime.o hex.o \
+  fdmatch.o fnmatch.o getopt.o getopt1.o getpwd.o getruntime.o hex.o \
   floatformat.o objalloc.o obstack.o pexecute.o spaces.o \
   splay-tree.o strerror.o strsignal.o xatexit.o xexit.o xmalloc.o \
   xstrdup.o xstrerror.o
@@ -254,6 +254,7 @@ getcwd.o: config.h
 getopt.o: config.h $(INCDIR)/getopt.h
 getopt1.o: config.h $(INCDIR)/getopt.h
 getpagesize.o: config.h
+getpwd.o: config.h $(INCDIR)/libiberty.h
 getruntime.o: config.h $(INCDIR)/libiberty.h
 hex.o: $(INCDIR)/libiberty.h
 floatformat.o: $(INCDIR)/floatformat.h

libiberty/config.in

@@ -214,6 +214,9 @@
 /* Define if you have the <sys/resource.h> header file.  */
 #undef HAVE_SYS_RESOURCE_H
 
+/* Define if you have the <sys/stat.h> header file.  */
+#undef HAVE_SYS_STAT_H
+
 /* Define if you have the <sys/time.h> header file.  */
 #undef HAVE_SYS_TIME_H
 

libiberty/configure

@@ -1055,7 +1055,7 @@ else
 fi
 echo "$ac_t""$CPP" 1>&6
 
-for ac_hdr in sys/file.h sys/param.h stdlib.h string.h unistd.h strings.h sys/time.h sys/resource.h
+for ac_hdr in sys/file.h sys/param.h stdlib.h string.h unistd.h strings.h sys/time.h sys/resource.h sys/stat.h
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6

libiberty/configure.in

@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script
 
-AC_PREREQ(2.12.1)
+AC_PREREQ(2.13)
 AC_INIT(pexecute.c)
 
 dnl We use these options to decide which functions to include.
@@ -106,7 +106,7 @@ AC_SUBST_FILE(host_makefile_frag)
 # It's OK to check for header files.  Although the compiler may not be
 # able to link anything, it had better be able to at least compile
 # something.
-AC_CHECK_HEADERS(sys/file.h sys/param.h stdlib.h string.h unistd.h strings.h sys/time.h sys/resource.h)
+AC_CHECK_HEADERS(sys/file.h sys/param.h stdlib.h string.h unistd.h strings.h sys/time.h sys/resource.h sys/stat.h)
 AC_HEADER_SYS_WAIT
 
 # This is the list of functions which libiberty will provide if they

libiberty/getpwd.c

@@ -0,0 +1,117 @@
+/* getpwd.c - get the working directory */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/types.h>
+
+#include <errno.h>
+#ifndef errno
+extern int errno;
+#endif
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+
+/* Prototype these in case the system headers don't provide them. */
+extern char *getpwd ();
+extern char *getwd ();
+
+#include "libiberty.h"
+
+/* Virtually every UN*X system now in common use (except for pre-4.3-tahoe
+   BSD systems) now provides getcwd as called for by POSIX.  Allow for
+   the few exceptions to the general rule here.  */
+
+#if !(defined (POSIX) || defined (USG) || defined (VMS)) || defined (HAVE_GETWD)
+#define getcwd(buf,len) getwd(buf)
+#ifdef MAXPATHLEN
+#define GUESSPATHLEN (MAXPATHLEN + 1)
+#else
+#define GUESSPATHLEN 100
+#endif
+#else /* (defined (USG) || defined (VMS)) */
+/* We actually use this as a starting point, not a limit.  */
+#define GUESSPATHLEN 100
+#endif /* (defined (USG) || defined (VMS)) */
+
+#if !(defined (VMS) || (defined(_WIN32) && !defined(__CYGWIN__)))
+
+/* Get the working directory.  Use the PWD environment variable if it's
+   set correctly, since this is faster and gives more uniform answers
+   to the user.  Yield the working directory if successful; otherwise,
+   yield 0 and set errno.  */
+
+char *
+getpwd ()
+{
+  static char *pwd;
+  static int failure_errno;
+
+  char *p = pwd;
+  size_t s;
+  struct stat dotstat, pwdstat;
+
+  if (!p && !(errno = failure_errno))
+    {
+      if (! ((p = getenv ("PWD")) != 0
+	     && *p == '/'
+	     && stat (p, &pwdstat) == 0
+	     && stat (".", &dotstat) == 0
+	     && dotstat.st_ino == pwdstat.st_ino
+	     && dotstat.st_dev == pwdstat.st_dev))
+
+	/* The shortcut didn't work.  Try the slow, ``sure'' way.  */
+	for (s = GUESSPATHLEN;  ! getcwd (p = xmalloc (s), s);  s *= 2)
+	  {
+	    int e = errno;
+	    free (p);
+#ifdef ERANGE
+	    if (e != ERANGE)
+#endif
+	      {
+		errno = failure_errno = e;
+		p = 0;
+		break;
+	      }
+	  }
+
+      /* Cache the result.  This assumes that the program does
+	 not invoke chdir between calls to getpwd.  */
+      pwd = p;
+    }
+  return p;
+}
+
+#else	/* VMS || _WIN32 && !__CYGWIN__ */
+
+#ifndef MAXPATHLEN
+#define MAXPATHLEN 255
+#endif
+
+char *
+getpwd ()
+{
+  static char *pwd = 0;
+
+  if (!pwd)
+    pwd = getcwd (xmalloc (MAXPATHLEN + 1), MAXPATHLEN + 1
+#ifdef VMS
+		  , 0
+#endif
+		  );
+  return pwd;
+}
+
+#endif	/* VMS || _WIN32 && !__CYGWIN__ */