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authorUlrich Drepper <drepper@gmail.com>2011-05-08 08:37:19 -0400
committerUlrich Drepper <drepper@gmail.com>2011-05-08 08:37:19 -0400
commit7fb90fb89bbdf273ab7ab96517fe1b156cd7aee1 (patch)
treec9fb5b27f0c75b57cd3090e2f3c857feba542f41 /include/sys
parent28377d1bf58625172a1734b92e835591d4d23a18 (diff)
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Fix Linux getcwd for long paths
The getcwd syscall (so far?) can only handle path up to one page
in size.  There is no limit about directory hierarchy depth, though,
and the POSIX getcwd is supposed to handle this.  In that case fall
back to the generic getcwd.

Additionally, optimize the generic getcwd to use openat when possible
to change the asymptotic performance from O(N^2) to O(n).
Diffstat (limited to 'include/sys')
-rw-r--r--include/sys/stat.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/sys/stat.h b/include/sys/stat.h
index 66898b1760..e00df5381e 100644
--- a/include/sys/stat.h
+++ b/include/sys/stat.h
@@ -48,4 +48,6 @@ libc_hidden_proto (__fxstatat64)
 #define fstat64(fd, buf) __fxstat64 (_STAT_VER, fd, buf)
 #define fstat(fd, buf) __fxstat (_STAT_VER, fd, buf)
 #define __fstat(fd, buf) __fxstat (_STAT_VER, fd, buf)
+#define __fstatat(dfd, fname, buf, flag) \
+  __fxstatat (_STAT_VER, dfd, fname, buf, flag)
 #endif