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ffi-libc

CI Code Climate

Description

Useful Ruby FFI bindings for libc.

Features

  • Provides common Structs used in libc:
    • {FFI::LibC::Ifaddrs}
    • {FFI::LibC::In6Addr}
    • {FFI::LibC::InAddr}
    • {FFI::LibC::SockaddrDL}
    • {FFI::LibC::SockaddrFamily}
    • {FFI::LibC::SockaddrIn6}
    • {FFI::LibC::SockaddrIn}
    • {FFI::LibC::Sockaddr}
    • {FFI::LibC::Timeval}
    • {FFI::LibC::Timezone}
    • {FFI::LibC::RUsage}
  • Binds to common functions and global variables in libc:
    • errno.h:
      • sys_errlist (BSD)
      • sys_nerr (BSD)
      • errno
    • unistd.h:
      • brk
      • sbrk
      • getpid
      • getppid
      • getuid
      • geteuid
      • getgid
      • getegid
    • stdlib.h:
      • calloc
      • malloc
      • free
      • realloc
      • getenv
      • putenv
      • unsetenv
      • clearenv
    • time.h:
      • time
    • sys/time.h:
      • gettimeofday
      • settimeofday
    • sys/resource.h / bits/resource.h:
      • getrusage
    • sys/mman.h:
      • mmap
      • munmap
    • string.h:
      • bzero
      • memset
      • memcpy
      • memcmp
      • memchr
      • memrchr
      • strcpy
      • strncpy
      • strlen
      • index
      • rindex
      • strchr
      • strrchr
      • strstr
      • strerror
    • stdio.h:
      • stdin
      • stdout
      • stderr
      • fopen
      • fdopen
      • freopen
      • fseek
      • ftell
      • rewind
      • fread
      • fwrite
      • fgetc
      • fgets
      • fputc
      • fputs
      • fflush
      • fclose
      • clearerr
      • feof
      • ferror
      • fileno
      • perror
    • netdb.h:
      • getnameinfo
    • ifaddrs.h:
      • getifaddrs
      • freeifaddrs

Requirements

Install

$ gem install ffi-libc

gemspec

gem.add_dependency 'ffi-libc', '~> 0.1'

Gemfile

gem 'ffi-libc', '~> 0.1'

License

Copyright (c) 2010-2021 Hal Brodigan

See {file:LICENSE.txt} for license information.

ffi-libc's People

Contributors

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Forkers

judofyr tobert alekstorm rumblinthebronx teplinkiy stasyuk krylopropil konezavodchik

ffi-libc's Issues

Function 'sys_errlist' not found by require 'ffi/libc' on glibc 2.32

Hello,

I got the following error "Function 'sys_errlist' not found" on my Linux distribution Fedora 34 environment.
Do you have any idea to fix it?
Thank you.

$ cat /etc/fedora-release 
Fedora release 34 (Rawhide)

$ ruby -v
ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-linux]

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/10/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,fortran,objc,obj-c++,ada,go,d,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl --enable-offload-targets=nvptx-none --without-cuda-driver --enable-gnu-indirect-function --enable-cet --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.2.1 20201125 (Red Hat 10.2.1-9) (GCC) 

$ rpm -q glibc
glibc-2.32.9000-17.fc34.x86_64

$ rpm -q glibc-devel
glibc-devel-2.32.9000-17.fc34.x86_64

ffi-libc is the latest version 0.1.0.

$ gem list ffi     

*** LOCAL GEMS ***

ffi (1.12.1)
ffi-libc (0.1.0)

$ ruby -e "require 'ffi/libc'"
Traceback (most recent call last):
	2: from -e:1:in `<main>'
	1: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:83:in `require'
/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:83:in `require': cannot load such file -- ffi/libc (LoadError)
	10: from -e:1:in `<main>'
	 9: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:147:in `require'
	 8: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:159:in `rescue in require'
	 7: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:159:in `require'
	 6: from /builddir/.gem/ruby/gems/ffi-libc-0.1.0/lib/ffi/libc.rb:13:in `<top (required)>'
	 5: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:83:in `require'
	 4: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:83:in `require'
	 3: from /builddir/.gem/ruby/gems/ffi-libc-0.1.0/lib/ffi/libc/libc.rb:9:in `<top (required)>'
	 2: from /builddir/.gem/ruby/gems/ffi-libc-0.1.0/lib/ffi/libc/libc.rb:10:in `<module:FFI>'
	 1: from /builddir/.gem/ruby/gems/ffi-libc-0.1.0/lib/ffi/libc/libc.rb:19:in `<module:LibC>'
/usr/share/gems/gems/ffi-1.12.1/lib/ffi/library.rb:342:in `attach_variable': Function 'sys_errlist' not found in [#<FFI::DynamicLibrary:0x0000556ea6f649c8>] (FFI::NotFoundError)

Perhaps, the sys_errlist does not exist on the new glibc version?
I find this article.
https://stackoverflow.com/questions/33948508/why-is-sys-errlist-deprecated-in-glibc

Explose clock(3)

I'd love to use clock(3) to measure unit spec runtime minus iowait.

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