Vxworks Recvfrom Non Blocking Assignment

Posted on by Yor

Next:6.0.3 The Sendto() call Up:6 The Socket API Previous:6.0.1 The Socket() call

6.0.2 The call

Here is the prototype of the system call:

The arguments to this call are basically the same as the standard socket call. The call reads ``one packet at a time''. It returns the length of the message written to the buffer pointed to by the argument (the second argument). Even if one packet worth of message does not ``fill up'' the buffer, will return immediately and will not read the second packet. However, if a message in a packet is too long to fit in the supplied buffer, the excess bytes are discarded.

By default, is blocking: when a process issues a that cannot be completed immediately (because there is no packet), the process is put to sleep waiting for a packet to arrive at the socket. Therefore, a call to will return immediately only if a packet is available on the socket.

When the argument of is set to , does not block if there is no data to be read, but returns immediately with a return value of 0 bytes. is defined in . In an actual UNIX system, socket descriptors are set to be non-blocking using with type , and returns errno when there is no data to be read on the non-blocking socket.



Next:6.0.3 The Sendto() call Up:6 The Socket API Previous:6.0.1 The Socket() call

 

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    • LIN8-3664 : CLONE - Linux kernel does not compile after having selected USB Serial support
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    • LIN8-3812 : [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe A FIFO underrun
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    • LIN8-3874 : workqueue call trace when booting preempt-rt kerenl of axxiaarm
    • LIN8-3890 : kdump kernel will crash when init qman on t4240 board
    • LIN8-3897 : compiling failure when CONFIG_AUFS_FS is enabled in preempt-rt kernel.
    • LIN8-3956 : CLONE - EPB2 board booting hanged while trying to acquire spinlock(&inode_sb_list_lock)
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    • LIN8-4044 : hvc_console.c:847:15: warning: initialization from incompatible pointer type
    • LIN8-4045 : mousedev.c:749:15: warning: passing argument 1 of '__cpu_to_le16p' from incompatible pointer type [-Wincompatible-pointer-types]
    • LIN8-4046 : arm/kernel/setup.c:376:6: warning: unused variable 'isar5' [-Wunused-variable]
    • LIN8-4048 : WARNING: [kernel config]: with intel-vmware-guest-64/32
    • LIN8-4049 : WARNING: [kernel config]: with fsl-e500mc
    • LIN8-4070 : Security Advisory - linux - CVE-2016-3707
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    • LIN8-4079 : Security Advisory - linux - CVE-2016-5243
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    • LIN8-4087 : Security Advisory - linux - CVE-2016-5828
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    • LIN8-4093 : Security Advisory - linux - CVE-2016-1237
    • LIN8-4095 : Security Advisory - linux - CVE-2016-3070
    • LIN8-4096 : Security Advisory - linux - CVE-2016-3955
    • LIN8-4097 : Security Advisory - linux - CVE-2016-4997
    • LIN8-4098 : Security Advisory - linux - CVE-2016-4998
    • LIN8-4121 : gdb can not work on t10xx board with wrlinux 8 RCPL3 project
    • LIN8-4121 : gdb target killed by kernel oops on fsl-t10xx board with wrlinux 8 RCPL3 project
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    • LIN8-4137 : MMC driver reports incorrect partition size at boot
    • LIN8-4164 : WARNING: QA Issue: /usr/lib64/protobuf/ptest/run-ptest_protobuf-ptest contained in package protobuf-ptest requires /bin/bash, but no providers found in its RDEPENDS [file-rdeps]
    • LIN8-4181 : Security Advisory - linux - CVE-2016-6130
    • LIN8-4217 : ls102x's spi controller can not worked well in wrlinux 8
    • LIN8-4341 : WARNING: modpost: Found 1 section mismatch(es). with qemumips64/qemumip
    • LIN8-4362 : pcie msi irq problem in wrlinux 7 RCPL12 ls1021 project
    • LIN8-4371 : CLONE - IPv4: Router TTL value is applied globally in resource layer (Linux)
    • LIN8-4372 : CLONE - wrlinux6, fsl-e500mc kernel can't remove the usdpaa module, qman driver build failure
    • LIN8-4376 : a PCIe device's irq is set by "0" in wrlinux8
    • LIN8-4381 : cpup.c:574:40: warning: unused variable 'inode' [-Wunused-variable]
    • LIN8-4385 : Intel UART Overflow mask not restored upon resume
    • LIN8-4388 : fsl-t4xxx: WARNING: QA Issue: pme: /pme/etc/udev/rules.d/06-fsl-pme-device.rules is owned by uid 19307, which is the same as the user running bitbake. This may be due to host contamination [host-user-contaminated]
    • LIN8-4400 : Security Advisory - linux - CVE-2016-5696
    • LIN8-4418 : Security Advisory - linux - CVE-2016-3841
    • LIN8-4427 : Security Advisory - linux - CVE-2015-8944
    • LIN8-4429 : Security Advisory - linux - CVE-2016-6198
    • LIN8-4432 : Security Advisory - linux - CVE-2016-6187
    • LIN8-4437 : Security Advisory - linux - CVE-2016-6480
    • LIN8-4444 : Security Advisory - linux - CVE-2016-6136
    • LIN8-4449 : Security Advisory - linux - CVE-2016-5400
    • LIN8-4456 : Security Advisory - linux - CVE-2016-6197
    • LIN8-4494 : intel-x86-64 : getent miss on board makes lxc-net start failed
    • LIN8-4546 : u-boot-fw-utils build fails
    • LIN8-4595 : fsl-ls1043 : build_cloned_bsp testing failed - No rule to make target 'arch/arm64/boot/dts/freescale/clonedbspa-rdb.dtb'
    • LIN8-4612 : fsl-t4xxx: sensors-detect can not initialize correct cpu list
    • LIN8-4614 : [wraxl] linux-windriver_4.1 failed (do_compile) of cav-octeon3_small.
    • LIN8-4658 : fsl-ls1043 : clone_bsp.sh caught issue on dvd wrlinux80RCPL/RCPL0009_LX06
    • LIN8-4682 : WARNING: [kernel config]: specified values did not make it into the kernel's final configuration: with intel-x86-32
    • LIN8-4683 : [kernel WARNING: modpost: Found 1 section mismatch(es). with fsl-p2020
    • LIN8-4687 : fmlib: build error for fsl-t1xxx-32b BSP
    • LIN8-4688 : Cannot generate iso image with GPLv3 blacklisted
    • LIN8-4690 : build error for BSP fsl-t1xxx-32b
    • LIN8-4696 : fsl-t1xxx-32b: fmc package compilation issue
    • LIN8-4699 : CLONE - The hrtimers[CLOCK_REALTIME] expires early at leap second insertion
    • LIN8-4705 : fsl-imx6: typo in README file
    • LIN8-4711 : fsl-imx6: configuration error, cannot configure glibc-std-sato rootfs with imx6 graphics layer and common layer
    • LIN8-4809 : when starting with a new platform project and enabling kgdb - it does not build
    • LIN8-4810 : CLONE - fsl-t4xxx reboot have kernel call trace.
    • LIN8-4815 : 1
    • LIN8-4816 : 1
    • LIN8-4825 : BSP README's Multilib is not helpful
    • LIN8-4847 : "irq 86: nobody cared" error occurred when ttyS1 is used
    • LIN8-4871 : Security Advisory - linux - CVE-2016-7117
    • LIN8-4873 : Security Advisory - linux - CVE-2015-8955
    • LIN8-4876 : Security Advisory - linux - CVE-2015-8956
    • LIN8-4921 : Nothing PROVIDES 'lib32-netmap-modules' of fsl-ls1043_world_bd
    • LIN8-4946 : Security Advisory - linux - CVE-2016-5195
    • LIN8-4962 : x86/pm: Introduce quirk framework to save/restore extra MSR registers around suspend/resume
    • LIN8-4963 : A low-level hibernation bug
    • LIN8-4967 : Security Advisory - linux - CVE-2016-6828
    • LIN8-4968 : Security Advisory - linux - CVE-2016-7042
    • LIN8-4969 : Security Advisory - linux - CVE-2016-8666
    • LIN8-4971 : Security Advisory - linux - CVE-2016-6327
    • LIN8-4972 : Security Advisory - linux - CVE-2016-7097
    • LIN8-4975 : Security Advisory - linux - CVE-2016-8658
    • LIN8-4977 : Security Advisory - linux - CVE-2016-7039
    • LIN8-4978 : Security Advisory - linux - CVE-2016-7425
    • LIN8-4979 : Security Advisory - linux - CVE-2015-8952
    • LIN8-4991 : wrl8 : dependency issue for DPDK 16.04
    • LIN8-4998 : DRM crashes in many system units with RCPL9
    • LIN8-5002 : lxc : lxc_console_cb_tty_master: 672 Input/output error - failed to read while run 'poweroff' in container
    • LIN8-5051 : fsl-t1xxx-32b perf-1.0-r9 do_configure failed.
    • LIN8-5056 : panic: intel-x86-64 kernel preempt-rt unable to reach login prompt
    • LIN8-5109 : intel-x86-64 : do_compile kernel with CONFIG_USB_USBNET failed
    • LIN8-5119 : ECMLNH crash on WRL8
    • LIN8-5122 : intel-x86 BSP's Multilib
    • LIN8-5123 : Missing fix: Use MSG_NOSIGNAL when calling sendmsg()
    • LIN8-5129 : Security Advisory - linux - CVE-2016-7910
    • LIN8-5130 : Security Advisory - linux - CVE-2015-8962
    • LIN8-5132 : Security Advisory - linux - CVE-2016-7917
    • LIN8-5133 : Security Advisory - linux - CVE-2016-7916
    • LIN8-5134 : Security Advisory - linux - CVE-2016-7915
    • LIN8-5135 : Security Advisory - linux - CVE-2016-7914
    • LIN8-5136 : Security Advisory - linux - CVE-2016-7913
    • LIN8-5138 : Security Advisory - linux - CVE-2016-7912
    • LIN8-5139 : Security Advisory - linux - CVE-2016-7911
    • LIN8-5140 : Security Advisory - linux - CVE-2016-8645
    • LIN8-5141 : Security Advisory - linux - CVE-2015-8964
    • LIN8-5156 : CLONE - CLONE - Incorrect CPU load for SCHED_FIFO threads via proc
    • LIN8-5167 : CLONE - BUG at block/cfq-iosched.c:3278
    • LIN8-5179 : t4xxx: console frozen after running CPU hotplug stress tests for a few seconds
    • LIN8-5190 : Security Advisory - linux - CVE-2015-8963
    • LIN8-5205 : In preempt-rt kernel, nobody cared irq will cause BUG of sleeping function called from invalid context.
    • LIN8-5211 : Security Advisory - linux - CVE-2016-8655
    • LIN8-521 : valgrind ptest segmentation faults result in a PASS status
    • LIN8-5230 : zlib errors in kexec-tools
    • LIN8-5260 : Security Advisory - linux - CVE-2016-9083
    • LIN8-5263 : Security Advisory - linux - CVE-2016-8650
    • LIN8-5278 : Security Advisory - linux - CVE-2016-9191
    • LIN8-5283 : Security Advisory - linux - CVE-2016-9313
    • LIN8-5294 : Security Advisory - linux - CVE-2016-9919
    • LIN8-5296 : Security Advisory - linux - CVE-2016-9178
    • LIN8-5303 : Security Advisory - linux - CVE-2016-8630
    • LIN8-5325 : Security Advisory - linux - CVE-2016-9644
    • LIN8-5327 : Security Advisory - linux - CVE-2016-9120
    • LIN8-5337 : Security Advisory - linux - CVE-2016-9555
    • LIN8-5351 : Security Advisory - linux - CVE-2016-8633
    • LIN8-5376 : Security Advisory - linux - CVE-2016-8646
    • LIN8-5378 : Security Advisory - linux - CVE-2015-8966
    • LIN8-5386 : Security Advisory - linux - CVE-2016-8632
    • LIN8-5393 : CLONE - cgroup: a parent css is freed and offline before its children
    • LIN8-5394 : drbd-utils: PKG_PROG_PKG_CONFIG: command not found
    • LIN8-5400 : Recipe for target 'drivers/thermal/intel_soc_dts_thermal.o' failed
    • LIN8-5401 : CLONE - fix bug for kexec-tools
    • LIN8-5403 : WRL hypervisor: annoying messages when starting KVM guest
    • LIN8-5445 : Security Advisory - linux - CVE-2016-9793
    • LIN8-5447 : Security Advisory - linux - CVE-2016-9756
    • LIN8-5452 : Security Advisory - linux - CVE-2016-9806
    • LIN8-5454 : Security Advisory - linux - CVE-2016-6213
    • LIN8-5455 : Security Advisory - linux - CVE-2016-9588
    • LIN8-5459 : Security Advisory - linux - CVE-2016-9576
    • LIN8-5466 : Security Advisory - linux - CVE-2016-9794
    • LIN8-5467 : Security Advisory - linux - CVE-2016-9685
    • LIN8-5495 : [wraxl] fmc_git failed (do_compile) of fsl-t1xxx-32b_fmc_rca14348.
    • LIN8-5502 : Kernel panic when booting WRL8 on a Xeon E5-2603v4 with a supermicro X10SRA motherboard
    • LIN8-5508 : cav-octeon3 kernel do_compile failed when setting NUMA
    • LIN8-5540 : Security Advisory - lxc - CVE-2016-10124
    • LIN8-5542 : Security Advisory - linux - CVE-2016-10088
    • LIN8-5543 : Security Advisory - linux - CVE-2016-9754
    • LIN8-5606 : Security Advisory - linux - CVE-2017-2584
    • LIN8-5623 : Install process failing to boot, using the /export/images/wrlinux-image-installer-intel-x86-64.iso
    • LIN8-5626 : actions-s500: kernel warning during building wireless related modules
    • LIN8-5697 : Security Advisory - linux - CVE-2017-5549
    • LIN8-5699 : Security Advisory - linux - CVE-2016-10147
    • LIN8-5704 : Security Advisory - linux - CVE-2017-2596
    • LIN8-5714 : Security Advisory - linux - CVE-2017-2583
    • LIN8-5757 : Security Advisory - linux - CVE-2017-5551
    • LIN8-5791 : Security Advisory - linux - CVE-2016-10208
    • LIN8-5837 : Compilation error: Function failed: build_boot_dd
    • LIN8-5839 : Fail to build uImage for mv-armada-38x
    • LIN8-5859 : Security Advisory - linux - CVE-2017-6074
    • LIN8-5879 : x86: boot freezes/crashes when negative clearcpuid= is used (e.g. -987654321)
    • LIN8-5895 : Security Advisory - linux - CVE-2017-6001
    • LIN8-5904 : Security Advisory - linux - CVE-2017-5970
    • LIN8-5909 : Security Advisory - linux - CVE-2017-5669
    • LIN8-5917 : Security Advisory - linux - CVE-2017-5967
    • LIN8-5918 : Security Advisory - linux - CVE-2017-6214
    • LIN8-5938 : Security Advisory - linux - CVE-2017-5986
    • LIN8-5984 : compile error: 'const struct dccp_hdr' has no member named 'dccp_doff'
    • LIN8-5994 : CLONE - 40G network driver performance issue
    • LIN8-6011 : Security Advisory - linux - CVE-2017-6346
    • LIN8-6016 : Security Advisory - linux - CVE-2017-2636
    • LIN8-6022 : Security Advisory - linux - CVE-2016-10200
    • LIN8-6032 : Security Advisory - linux - CVE-2017-6348
    • LIN8-6049 : Security Advisory - linux - CVE-2017-6353
    • LIN8-6078 : Security Advisory - linux - CVE-2017-6345
    • LIN8-6079 : Security Advisory - linux - CVE-2017-6347
    • LIN8-6124 : CLONE - kernel crashes during reboot
    • LIN8-6159 : Security Advisory - linux - CVE-2017-7261
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