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| author | Ulrich Drepper <drepper@redhat.com> | 2005-10-15 17:28:08 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2005-10-15 17:28:08 +0000 |
| commit | b7cd53255606e8cd0030319df6b366afd86979bd (patch) | |
| tree | bb5062b1658dfc9185337d33c1f6425c8f2d1c62 /sysdeps/unix/fdopendir.c | |
| parent | ebb58ba3c23dc0d24d1b09aafd289f208ce6e75b (diff) | |
| download | glibc-b7cd53255606e8cd0030319df6b366afd86979bd.tar.gz glibc-b7cd53255606e8cd0030319df6b366afd86979bd.tar.xz glibc-b7cd53255606e8cd0030319df6b366afd86979bd.zip | |
* sysdeps/unix/fdopendir.c (fdopendir): Make sure descriptor
allows reading.
Diffstat (limited to 'sysdeps/unix/fdopendir.c')
| -rw-r--r-- | sysdeps/unix/fdopendir.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sysdeps/unix/fdopendir.c b/sysdeps/unix/fdopendir.c index ef6c97c308..23d08fd7fd 100644 --- a/sysdeps/unix/fdopendir.c +++ b/sysdeps/unix/fdopendir.c @@ -18,6 +18,7 @@ #include <dirent.h> #include <errno.h> +#include <fcntl.h> #include <sys/stat.h> #include <not-cancel.h> @@ -35,6 +36,15 @@ fdopendir (int fd) __set_errno (ENOTDIR); return NULL; } + /* Make sure the descriptor allows for reading. */ + int flags = __fcntl (fd, F_GETFL); + if (__builtin_expect (flags == -1, 0)) + return NULL; + if (__builtin_expect ((flags & O_ACCMODE) == O_WRONLY, 0)) + { + __set_errno (EINVAL); + return NULL; + } return __alloc_dir (fd, false, &statbuf); } |