From a5a4b38c6a43d9da46cdd0244b1aae07d7bcce5c Mon Sep 17 00:00:00 2001 From: Romain Naour Date: Sun, 6 Apr 2014 14:37:33 +0200 Subject: [PATCH] util-linux: add a check for mkostemp() mkostemp() is missing with older version of uClibc (uClibc <= 0.9.33). So, we need to check if mkostemp() is available. If not, we use a wrapper function based on mkstemp() to implement it. Since util-linux v2.23, mkostemp() is called with O_CLOEXEC flag. If we use a define to mkstemp() to implement mkostemp(), flags will be discared. mkstemp() will pass O_RDWR|O_CREAT|O_EXCL, but not O_CLOEXEC, which means that the file descriptor will no longer be closed automatically upon exec(). To avoid to discard the flags, we add a call to fcntl() to set O_CLOEXEC flag just after mkstemp(). Signed-off-by: Romain Naour Signed-off-by: Peter Korsgaard --- ...mkostemp-for-older-version-of-uClibc.patch | 50 +++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 package/util-linux/util-linux-004-c.h-define-mkostemp-for-older-version-of-uClibc.patch diff --git a/package/util-linux/util-linux-004-c.h-define-mkostemp-for-older-version-of-uClibc.patch b/package/util-linux/util-linux-004-c.h-define-mkostemp-for-older-version-of-uClibc.patch new file mode 100644 index 0000000000..0dfe7befba --- /dev/null +++ b/package/util-linux/util-linux-004-c.h-define-mkostemp-for-older-version-of-uClibc.patch @@ -0,0 +1,50 @@ +From 42a84250fc78bae3e885ecd1379e713663fe6487 Mon Sep 17 00:00:00 2001 +From: Romain Naour +Date: Sun, 6 Apr 2014 12:12:41 +0200 +Subject: [PATCH 1/1] c.h: define mkostemp for older version of uClibc + +Signed-off-by: Romain Naour +--- + configure.ac | 2 ++ + include/c.h | 14 ++++++++++++++ + 2 files changed, 16 insertions(+) + +diff --git a/configure.ac b/configure.ac +index 35a1f26..a9b8d34 100644 +--- a/configure.ac ++++ b/configure.ac +@@ -321,6 +321,8 @@ AC_CHECK_FUNCS([ \ + ]) + AC_FUNC_FSEEKO + ++AC_CHECK_FUNCS([mkostemp]) ++ + AC_CHECK_FUNCS([openat fstatat unlinkat], [have_openat=yes], [have_openat=no]) + AC_CHECK_FUNCS([ioperm iopl], [have_io=yes]) + +diff --git a/include/c.h b/include/c.h +index 4a9bf3d..1b880ed 100644 +--- a/include/c.h ++++ b/include/c.h +@@ -300,4 +300,18 @@ static inline int usleep(useconds_t usec) + # define SEEK_HOLE 4 + #endif + ++/* ++ * mkostemp() may be missing with older version of uClibc ++ */ ++#ifndef HAVE_MKOSTEMP ++static inline int mkostemp(char *template, int flags) ++{ ++ int fd; ++ fd = mkstemp(template); ++ if (flags & O_CLOEXEC && fd >= 0) ++ fcntl(fd, F_SETFD, FD_CLOEXEC); ++ return fd; ++} ++#endif ++ + #endif /* UTIL_LINUX_C_H */ +-- +1.9.0 +