StudyingUnixInterface

对Linux/UNIX环境下的系统调用与公共函数库的学习实践代码

简介

本仓库中包含有本人在Linux/UNIX环境相关的笔记与代码，使用C语言并使用VIM编辑器进行编写。

运行环境

本仓库的代码均在本人的开发服务器上运行与调试

开发服务器环境

主要列出开发服务器的基本信息和软硬件环境

系统基本信息

1. Linux Saturneric-Dev 4.19.0-12-amd64 #1 SMP Debian 4.19.152-1 (2020-10-18) x86_64 GNU/Linux
2. Debian GNU/Linux 10 \n \l

软件环境

1. 编译环境GCC Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper OFFLOAD_TARGET_NAMES=nvptx-none OFFLOAD_TARGET_DEFAULT=1 Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 8.3.0-6' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-8 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 8.3.0 (Debian 8.3.0-6)
2. 已加载的内核模块 Module Size Used by ipt_MASQUERADE 16384 1 nf_conntrack_netlink 49152 0 xfrm_user 40960 1 xfrm_algo 16384 1 xfrm_user nft_chain_nat_ipv4 16384 4 nf_nat_ipv4 16384 2 ipt_MASQUERADE,nft_chain_nat_ipv4 br_netfilter 24576 0 bridge 188416 1 br_netfilter stp 16384 1 bridge llc 16384 2 bridge,stp aufs 274432 0 rfkill 28672 1 overlay 131072 0 binfmt_misc 20480 1 snd_hda_codec_analog 20480 1 snd_hda_codec_generic 86016 1 snd_hda_codec_analog snd_hda_intel 49152 1 snd_hda_codec 151552 3 snd_hda_codec_generic,snd_hda_intel,snd_hda_codec_analog coretemp 16384 0 snd_hda_core 94208 4 snd_hda_codec_generic,snd_hda_intel,snd_hda_codec_analog,snd_hda_codec snd_hwdep 16384 1 snd_hda_codec snd_pcm 114688 3 snd_hda_intel,snd_hda_codec,snd_hda_core snd_timer 36864 1 snd_pcm snd 94208 9 snd_hda_codec_generic,snd_hwdep,snd_hda_intel,snd_hda_codec_analog,snd_hda_codec,snd_timer,snd_pcm kvm 757760 0 iTCO_wdt 16384 0 iTCO_vendor_support 16384 1 iTCO_wdt soundcore 16384 1 snd irqbypass 16384 1 kvm dcdbas 16384 0 sg 36864 0 serio_raw 16384 0 rng_core 16384 0 evdev 28672 2 pcspkr 16384 0 nf_log_ipv6 16384 5 ip6t_REJECT 16384 1 nf_reject_ipv6 16384 1 ip6t_REJECT xt_hl 16384 22 ip6_tables 32768 52 ip6t_rt 16384 3 nf_log_ipv4 16384 5 nf_log_common 16384 2 nf_log_ipv4,nf_log_ipv6 ipt_REJECT 16384 1 nf_reject_ipv4 16384 1 ipt_REJECT xt_LOG 16384 10 nft_limit 16384 13 xt_limit 16384 0 xt_addrtype 16384 6 xt_tcpudp 16384 30 xt_conntrack 16384 17 nft_compat 20480 151 nft_counter 16384 197 nf_conntrack_netbios_ns 16384 0 nf_conntrack_broadcast 16384 1 nf_conntrack_netbios_ns nf_nat_ftp 16384 0 nf_nat 36864 2 nf_nat_ftp,nf_nat_ipv4 nf_conntrack_ftp 20480 1 nf_nat_ftp nf_conntrack 172032 9 xt_conntrack,nf_nat,nf_nat_ftp,ipt_MASQUERADE,nf_conntrack_netbios_ns,nf_nat_ipv4,nf_conntrack_broadcast,nf_conntrack_netlink,nf_conntrack_ftp nf_defrag_ipv6 20480 1 nf_conntrack nf_defrag_ipv4 16384 1 nf_conntrack libcrc32c 16384 2 nf_conntrack,nf_nat nf_tables 143360 472 nft_compat,nft_chain_nat_ipv4,nft_counter,nft_limit nfnetlink 16384 4 nft_compat,nf_conntrack_netlink,nf_tables parport_pc 32768 1 ppdev 20480 0 lp 20480 0 parport 57344 3 parport_pc,lp,ppdev ip_tables 28672 8 x_tables 45056 13 xt_conntrack,nft_compat,xt_LOG,xt_tcpudp,ipt_MASQUERADE,xt_addrtype,ip6t_rt,ip6_tables,ipt_REJECT,ip_tables,xt_limit,xt_hl,ip6t_REJECT autofs4 49152 2 ext4 745472 3 crc16 16384 1 ext4 mbcache 16384 1 ext4 jbd2 122880 1 ext4 crc32c_generic 16384 7 fscrypto 32768 1 ext4 ecb 16384 0 crypto_simd 16384 0 cryptd 28672 1 crypto_simd glue_helper 16384 0 aes_x86_64 20480 0 sd_mod 61440 5 ata_generic 16384 0 ahci 40960 4 libahci 40960 1 ahci ata_piix 36864 0 libata 270336 4 ata_piix,libahci,ahci,ata_generic i915 1736704 1 uhci_hcd 49152 0 ehci_pci 16384 0 ehci_hcd 94208 1 ehci_pci tg3 188416 0 psmouse 172032 0 i2c_i801 28672 0 video 49152 1 i915 scsi_mod 249856 3 sd_mod,libata,sg i2c_algo_bit 16384 1 i915 drm_kms_helper 208896 1 i915 lpc_ich 28672 0 mfd_core 16384 1 lpc_ich usbcore 294912 3 ehci_pci,ehci_hcd,uhci_hcd drm 495616 3 drm_kms_helper,i915 usb_common 16384 1 usbcore libphy 77824 1 tg3 button 16384 0

硬件环境

1. CPU processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz stepping : 6 microcode : 0x60f cpu MHz : 2014.515 cache size : 6144 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl cpuid aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 lahf_lm pti tpr_shadow vnmi flexpriority dtherm bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit bogomips : 5984.92 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management:

processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz stepping : 6 microcode : 0x60f cpu MHz : 2031.014 cache size : 6144 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl cpuid aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 lahf_lm pti tpr_shadow vnmi flexpriority dtherm bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit bogomips : 5984.92 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: 2. 内存信息 total used free shared buff/cache available Mem: 3871 1230 1782 33 858 2378 Swap: 4004 0 4004