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-rw-r--r--gcc-4.2.1-5666.3/libiberty/getpwd.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/libiberty/getpwd.c b/gcc-4.2.1-5666.3/libiberty/getpwd.c
new file mode 100644
index 000000000..fa5c132fd
--- /dev/null
+++ b/gcc-4.2.1-5666.3/libiberty/getpwd.c
@@ -0,0 +1,128 @@
+/* getpwd.c - get the working directory */
+
+/*
+
+@deftypefn Supplemental char* getpwd (void)
+
+Returns the current working directory. This implementation caches the
+result on the assumption that the process will not call @code{chdir}
+between calls to @code{getpwd}.
+
+@end deftypefn
+
+*/
+
+#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
+#if HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
+#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(HAVE_GETCWD) && defined(HAVE_GETWD)
+/* Prototype in case the system headers doesn't provide it. */
+extern char *getwd ();
+#define getcwd(buf,len) getwd(buf)
+#endif
+
+#ifdef MAXPATHLEN
+#define GUESSPATHLEN (MAXPATHLEN + 1)
+#else
+#define GUESSPATHLEN 100
+#endif
+
+#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 (void)
+{
+ 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 = XNEWVEC (char, 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 (void)
+{
+ static char *pwd = 0;
+
+ if (!pwd)
+ pwd = getcwd (XNEWVEC (char, MAXPATHLEN + 1), MAXPATHLEN + 1
+#ifdef VMS
+ , 0
+#endif
+ );
+ return pwd;
+}
+
+#endif /* VMS || _WIN32 && !__CYGWIN__ */