diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2023-03-26 12:49:32 +0300 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2023-04-05 07:18:30 +0300 |
| commit | 436b38fd89fe4324d2342084ef477a7a8809a001 (patch) | |
| tree | 6684428b0f52868b0011ead5c36eadf10ce631cd | |
| parent | 4cd9cb4a90550e0c45c85b0b00ca8a72ed13fdb4 (diff) | |
libcamera: Open files with O_CLOEXEC
Files opened internally in libcamera without the O_CLOEXEC file will
remain open upon a call to one of the exec(3) functions. As exec()
doesn't destroy local or global objects, this can lead to various side
effects. Avoid this by opening file descriptors with O_CLOEXEC for all
internal files.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
| -rw-r--r-- | src/ipa/vimc/vimc.cpp | 2 | ||||
| -rw-r--r-- | src/libcamera/base/file.cpp | 5 | ||||
| -rw-r--r-- | src/libcamera/media_device.cpp | 2 | ||||
| -rw-r--r-- | src/libcamera/pipeline/raspberrypi/dma_heaps.cpp | 2 |
4 files changed, 7 insertions, 4 deletions
diff --git a/src/ipa/vimc/vimc.cpp b/src/ipa/vimc/vimc.cpp index d5fabaf1..2c255778 100644 --- a/src/ipa/vimc/vimc.cpp +++ b/src/ipa/vimc/vimc.cpp @@ -168,7 +168,7 @@ void IPAVimc::initTrace() if (ret) return; - ret = ::open(ipa::vimc::VimcIPAFIFOPath.c_str(), O_WRONLY); + ret = ::open(ipa::vimc::VimcIPAFIFOPath.c_str(), O_WRONLY | O_CLOEXEC); if (ret < 0) { ret = errno; LOG(IPAVimc, Error) << "Failed to open vimc IPA test FIFO: " diff --git a/src/libcamera/base/file.cpp b/src/libcamera/base/file.cpp index fb3e276d..d1ab1aa5 100644 --- a/src/libcamera/base/file.cpp +++ b/src/libcamera/base/file.cpp @@ -163,6 +163,9 @@ bool File::exists() const * attempt to create the file with initial permissions set to 0666 (modified by * the process' umask). * + * The file is opened with the O_CLOEXEC flag, and will be closed automatically + * when a new binary is executed with one of the exec(3) functions. + * * The error() status is updated. * * \return True on success, false otherwise @@ -178,7 +181,7 @@ bool File::open(File::OpenMode mode) if (mode & OpenModeFlag::WriteOnly) flags |= O_CREAT; - fd_ = UniqueFD(::open(name_.c_str(), flags, 0666)); + fd_ = UniqueFD(::open(name_.c_str(), flags | O_CLOEXEC, 0666)); if (!fd_.isValid()) { error_ = -errno; return false; diff --git a/src/libcamera/media_device.cpp b/src/libcamera/media_device.cpp index 52c8e66e..2949816b 100644 --- a/src/libcamera/media_device.cpp +++ b/src/libcamera/media_device.cpp @@ -477,7 +477,7 @@ int MediaDevice::open() return -EBUSY; } - fd_ = UniqueFD(::open(deviceNode_.c_str(), O_RDWR)); + fd_ = UniqueFD(::open(deviceNode_.c_str(), O_RDWR | O_CLOEXEC)); if (!fd_.isValid()) { int ret = -errno; LOG(MediaDevice, Error) diff --git a/src/libcamera/pipeline/raspberrypi/dma_heaps.cpp b/src/libcamera/pipeline/raspberrypi/dma_heaps.cpp index 6b644406..317b1fc1 100644 --- a/src/libcamera/pipeline/raspberrypi/dma_heaps.cpp +++ b/src/libcamera/pipeline/raspberrypi/dma_heaps.cpp @@ -37,7 +37,7 @@ namespace RPi { DmaHeap::DmaHeap() { for (const char *name : heapNames) { - int ret = ::open(name, O_RDWR, 0); + int ret = ::open(name, O_RDWR | O_CLOEXEC, 0); if (ret < 0) { ret = errno; LOG(RPI, Debug) << "Failed to open " << name << ": " |