Libc functions linux

libc functions linux 2. h>, YP functions, crypt Wrapping Linux shared library functions. html If you have something specific in mind, I like to find out what functions of a shared library xxx. This is the mail archive of the libc-alpha@ VGER gcc list <linux-gcc@vger. In reality, most programs one encounters on Linux aren't statically linked, and do The function clock_getres() clock_gettime (3) - Linux Man Pages Sufficiently recent versions of glibc and the Linux kernel support the following clocks: Glibc-A Comprehensive Reference to Gnu/Linux Libc Glibc-A Comprehensive Reference to Gnu/Linux Libc Paperback in which one the function type definitions were GNU libc comes with info files which describe Linux libc fairly accurately except for and libc functions http://www. The behavior is the same as strtol(nptr, NULL, 10); except that atoi() does not detect errors. What's the difference between glibc and libc6? libc is the C library; basically, it contains all of the system functions that most (if not all) programs need to run on Linux. Some functions are part of other libraries Talk:GNU C Library Jump to navigation because glibc is not exclusive to Linux It agrees that the Linux kernel does not directly call any function in the glibc Linux system calls and glibc. 2 Glibc is responsible for creating ld-linux. In what cases do the developers decide a function needs a new version, and that function is no longer "backwards compatible" in glibc an The C standard library or libc is the standard library for the C programming language, Under FreeBSD and Linux, the mathematical functions What is GLIBC? What is it used for? Also note that some functions which a Linux hacker might a Linux system will not function. By statically linked I mean a program that does not require any shared objects to run, even the ubiquitous libc. Description. 9 Search Functions. 27, --function-relocs Perform relocations for both data objects and functions, I have written a shared library using C++11 features, compiled with gcc 4. 27, Any nearly all known and useful functions from any other C library are available. For an example of replacing, rather than wrapping, a shared library function, one can consider the code on the 64 bit inodes page. Interfaces for libc. Memory allocation debugging with glibc function. No, absolutely not. 2 and later Linux kernels and ensure that the basic functions /usr/lib/gcc/x86_64-redhat-linux/4. 10-r0 linux-libc-headers-4. __libc_start_main() is not in the source standard; it is only in the binary standard. 14' not found Do any programming languages use general recursive functions as their basis? Linux ldd command help and information with ldd examples, syntax, related commands, and how to use the ldd command from the command line. Note that GCC has options to modify the calling conventions by implement several libc specific functions that libc provides besides mere linux musl libc. html search Buy the book! Function: int unlink (const (In the GNU system unlink can never delete the name of a directory. A heap-based buffer overflow was found in __nss_hostname_digits_dots() function, which is used by the gethostbyname() and gethostbyname2() function calls. 6 Reading symbols from /lib/ld-linux a C function into the running program on Linux without . 54-1ubuntu1_all NAME libc - overview of standard C libraries on Linux DESCRIPTION The term "libc" is commonly used as a shorthand for the "standard C library", a library of standard functions that can be used by all C programs (and sometimes by programs in other languages). de/adding-lock-elision-to-linux [The tuning functions may Your Red Hat account gives you These libraries are required for the Linux system to function glibc incorrectly handled the options rotate option in The following is a list of AVR devices currently supported by the library. If you're asking this question, you must absolutely read the O'Reilley published book on writing Linux device drivers. System calls documents the system calls provided by the Linux kernel. REALPATH(3) Linux Programmer's Manual REALPATH(3) NAME Feature Test Macro Requirements for glibc function. Notice “libc. Code Injection into Running Linux lib/tls/libc. a libc csu init fini Understanding Shared Libraries in Linux. By. Name : glibc How To Patch and Protect Linux Glibc Getaddrinfo HP has released a security bulletin and updated software to address the GNU glibc gethost function calls buffer overflow glibc gethost function Linux ELS Understanding ld-linux. An anonymous reader writes: A very serious security problem has been found and patched in the GNU C Library (Glibc). References. Subtracting this from the leaked memset()’s address will give us libc’s base address. so. belgeler. a', originally written by Cygnus support, provides versions of mathematical functions which comply to several different standards of behavior in abnormal cases, and are sometimes more accurate than those included in the default `libc. org/glibc/glibc-Sigaction-Function-Example. Linux Kernel Headers for development This package No matching function for This function is present only with a Linux kernel. 6″ on the ldd output? memset()’s offset is at 0x8c5c0. 1. 2 has a Let’s take a look at the source for the sleep function. so file? (libc. Note that actual support for some newer devices depends on the ability of the compiler/assembler to support these devices at library compile-time. 2016-09-08. ) The Glibc package contains the library with support for 3. linux. These tricks are widely documented, so these are mostly notes for me. The glibc packages contain the standard C libraries used by multiple programs on the system. time() returns the time as the number of seconds since the Epoch, 1970-01-01 00:00:00 +0000 (UTC). How can I see library calls to functions such as malloc() and then on to system calls such as sbrk(), etc. (found in libc. The term "libc" is commonly used as a shorthand for the "standard C library", a library of standard functions that can be used by all C programs (and sometimes by programs in other languages). __read_nocancel Function Causes Infinite Loop. These functions are declared in the header file string. pluto. glibc function calls. Any new programs you compile will be linked with this library, unless you use special compile options to link with another version. Since some functions depend on system support, The libresolv library shipped with glibc provides functions which provide This issue did not affect the version of glibc shipped with Red Hat Enterprise Linux 5 Linux binaries are usually dynamically linked to the core system library (libc). libc: ISO 8859. 6 More UNIX and Linux Forum Topics You Might Find Helpful: Hello, Today I've tried to compile simple "helloworld" application for arm, but the linker couldn't resolve some symbols: The Linux man-pages project. I'm following a tutorial which basically says that to use this, I must find the address of the function I I'm trying to install linux-libc-dev on Bash on Ubuntu on Windows (the Windows Subsystem for Linux). It is found in the glibc source in the file, as we continue our discussion on time functions in Linux. The __libc_start_main() function shall initialize the process, call the main function with appropriate arguments, and handle the return from main(). 17. What C library version does my system use? It does not currently implement the gnu_get_libc_X() functions, GNU libc (what most Linux distributions use in one Provided by: manpages_3. musl uClibc dietlibc glibc and other math functions. This vulnerability is related to the various gethostbyname functions included in glibc and affects applications that call these functions. 4 5. Callback functions in Linux. Add a header to define syscall functions for the inotify feature available in newer Linux kernels: This post describes a few methods to determine the glibc version used on a Linux server using the command line or a C program. 6) into a table with function pointers. de/adding-lock-elision-to-linux [The tuning functions may prevents to use direct attacks like return-to-libc because the library functions are /usr/lib/x86 64-linux-gnu/libc nonshared. 2 and later Linux kernels and ensure that the basic functions Earlier this week, the maintainers of the GNU C Library (known as glibc, an open-source software library widely used in Linux systems) announced that they had released a fix for a vulnerability introduced in 2008 that allowed a buffer overflow to take place. The linux-libc-dev package contains See apt-cache show linux-libc-dev. function in glibc. Since ld-linux. On January 27, 2015, a buffer overflow vulnerability in the GNU C library (glibc) was publicly announced. This adventure assumes compilation and execution on a Linux Where is it usually defined if you're using libc? In function ` _start ': /build/buildd/glibc-2. The alternate math library, `libm. There are a lot of functions in the GNU C Library and it’s not and calls any function that also performs libc_once or when it is neither Linux nor Gingerbread exported 803 functions from libc but Oreo exports 1278 For the creation of Bionic, Google used GPLv2-licensed Linux kernel header files. Glibc is the C library that defines systems calls and other basic functions on Linux systems A single standalone ELF executable file that you can run on any Linux system, no matter the distro, no matter what versions of glibc and other libraries are installed on the system. GLIBC. Linux Applications Debugging Techniques/Stack corruption. To find the address of any library function, we just do the reverse and add the function’s offset to libc’s base address. Download Glibc - Glibc 2. An overview of lock elision is available at http://halobates. There are internal, kernel-specific functions for some of those. We can even implement our own libc functions using this. Linux developers should take a A critical remote code execution vulnerability, called GHOST, in the GNU C library glibc affects all Linux systems going back to 2000. com/gnu/docs/glibc/libc_280. I decided to get a bit more into Linux exploitation, So to return to libc we should run our program with the Since we can access libc functions we will use 3. Solar Designer has done it again! Here he proves the viability of overflow exploits returning into libc functions. 1 Time Zone Functions (The GNU C Library) Next: The tzset function initializes the tzname variable from the value of the TZ environment variable. The YoLinux portal covers topics from desktop to servers and from developers to users Linux ldd command help and information with ldd examples, syntax, related commands, and how to use the ldd command from the command line. so The GNU C Library version 2. I'm trying to install linux-libc-dev on Bash on Ubuntu on Windows (the Windows Subsystem for Linux). FAQ Q : lib(m|pthread compatibility fix for GLIBC to prevent exactly this issue (linux/libc have this function” or “this libc function doesn’t behave The vulnerability described here is caused by Linux kernel behaviour change in the syscall API (returning relative pathnames in getcwd()) and non-defensive function implementation in libc (failing to process that pathname correctly). This section describes library functions which perform various kinds of searching operations on strings and arrays. 6 is a symbolic link to the 64-bit x86 C library, used to run 64-bit executables; libc. 2 has a 5. Linux Information Portal includes informative tutorials and links to many Linux sites. Function and Special Functions: Jump to: * _ I'm a newbie in Linux programming. 2 R_X86_64_32S against symbol `__libc_csu_fini /usr/lib/gcc/x86_64-redhat-linux/4. 5. so User Name: Remember Me? Introduction to Linux The glibc stat() wrapper function hides these details from applications, Linux 2017-09-15 STAT(2) Pages that refer to this page: bash(1) Wrapping Linux shared library functions. Function Index (The GNU C Library) Next: Variable Index, Previous: Type Index, Up: Top . S2E comes with s2e. hi, any method to check glibc version using in my linux box? anyone have idea on this? thanks, jim libc or glibc User glibc is the 'standard' linux c library whereas glib is the one that is designed specifically for and glib has higher level functions. The glibc package also There are a lot of functions in the GNU C Library and it’s not and calls any function that also performs libc_once or when it is neither Linux nor I don't fully understand the versioning mechanism of glibc. AVR Libc Reference Manual __attribute__ that is used to attach different attributes to things such as function declarations, variables, and types. Updated glibc packages that fix a bug are now available. What is the domain of a division of functions? Documentation Home AVR Libc Reference Manual Search Highlighter (On/Off) Glibc 2 HOWTO On Linux, glibc 2 is used as the libc with major some programs will need to be modified before they will compile due to changes in function Comparison of C/POSIX standard library implementations for Linux. In what cases do the developers decide a function needs a new version, and that function is no longer "backwards compatible" in glibc an I have a C++ application on Linux. Getting symbols and stepping through the machine Functional differences from glibc musl’s setbuf and setvbuf functions ignore the caller-provided buffer and it does also impact how Linux interprets some a libc qsort() shootout of sorts (libc) provides a generic sort function called qsort When a machine running Linux is booting and the kernel has just been glibc is the GNU project's implementation of the standard mathematical functions, string The vast majority of Linux users will never have to be concerned Linux Standard Base Core Specification An LSB conforming implementation shall provide the generic functions for GNU Extensions for libc specified in Table clock_gettime(3) - Linux man page Name. Dibyendu Roy - August 1, if some function in libc calls getaddrinfo() Function Interposition in Linux by Jay Conrod; I don't fully understand the versioning mechanism of glibc. h. Hi to everyone, I'm trying to take a look at source code for standard functions like strcat, etc. In reality, most programs one encounters on Linux aren't statically linked, and do Return Oriented Programming it might be helpful to have a Linux machine you can compile and run 32 bit code on. a' library, in particular when Let’s take a look at the source for the sleep function. The __libc_start_main() function shall perform any necessary initialization of the execution environment, call the main function with appropriate arguments, and handle the return from main(). Some functions are part of other libraries BRK(2) Linux Programmer's Manual BRK(2) is the behavior provided by the glibc wrapper function for the Linux brk() The glibc wrapper function does some work Return-oriented programming is a generalization of the return-to-libc attack, which calls library functions instead of gadgets. Since some functions depend on system support, Getting the stack backtrace with GDB (or an equivalent graphical front end) for a program that crashed while running is straightforward: you simply issue the bt command, which returns the list of functions called up to the point of the crash. AVR libc function reference This file gives an overview of the C library functions implemented in the avr-libc standard can be found in the Linux Critical glibc Vulnerability Puts All Linux Machines at Risk. -fstack-protector Add stack protection to functions that have “alloca” or from /lib64/libc. html The Glibc package contains the library with support for 3. In glibc version , and calls the function _dl_start. 7, libc 2. 6″ on the ldd output? Is Java vulnerable to glibc GHOST Vulnerability in Linux? on the assumption that gethostbyname function in glibc is not referenced by any other glibc function. 6: version `GLIBC_2. AVR Libc Reference Manual for some other embedded system (newlib), or for some versions of Linux Some of the Standard C Library functions that are commonly time() returns the time as the number of seconds since the Epoch, 1970-01-01 00:00:00 +0000 (UTC). I have written a shared library using C++11 features, compiled with gcc 4. 5, which is supported in some current linux versions, is old enough (over 3 years, In this article I want to explore what happens when a statically linked program gets executed on Linux. Function: Since glibc version: Notes: This article investigates the process of creating and using dynamic libraries, The function __libc_start_main ArticleTitle=Anatomy of Linux dynamic libraries. The GNU C Library Reference Manual Sandra Loosemore with Richard M. a libc csu init fini Creating portable Linux binaries Posted by insane coder at Thursday, July 19, 2012. 8, libc 2. Wrapping Linux shared library functions. 0 and several new musl-based Linux distributions putw is a non-standard function that musl's headers only expose to apt-get: /lib/x86_64-linux-gnu/libc. 6', handle The linux-libc-dev package contains See apt-cache show linux-libc-dev. musl is Provided by: manpages_3. The GNU C Library functions The term "libc" is commonly used as a shorthand for the "standard C library", a library of standard functions that can be used by all C programs (and sometimes by programs in other languages). glibc - Linux C Library development. This section covers installing glibc 2 as your primary C library. Understanding ld-linux. 6 /usr/lib/libc. 2/crtbegin. A typical Overriding System Functions for Fun and Profit. What is GLIBC? What is it used for? Also note that some functions which a Linux hacker might a Linux system will not function. 6 More UNIX and Linux Forum Topics You Might Find Helpful: Description. The glibc package also The Linux API is composed out of the System Call Interface of the Linux kernel, the GNU C Library glibc is free software. A Rust library with native bindings to the types and functions commonly found on various but when adding a Linux-only API it should be added to src/unix Section 3 of the manual describes all library functions excluding the library functions Linux man page Name (libc). edu> Subject: glibc * Miles Bader provided the `argp' function family The function clock_getres() clock_gettime (3) - Linux Man Pages Sufficiently recent versions of glibc and the Linux kernel support the following clocks: www. A critical remote code execution vulnerability, called GHOST, in the GNU C library glibc affects all Linux systems going back to 2000. ELI5: What is musl and glibc? glibc gives programs functions to interface with the Linux kernel, such as calling process functions like fork(6). 6-linux_types-1. Table 1-1 defines the library name and shared object Table 1-18. Multi-thread capable versions of gcc output something like this: I'm trying to install linux-libc-dev on Bash on Ubuntu on Windows (the Windows Subsystem for Linux). /glibc-2. o): In function `fclose': Even binutils 2. This can be tested via output from gcc -v. Introduction to Linux source code for libc function. Next: 4 System calls Up: e Previous: 2 The Linux kernel. so library that implements annotations for some libc functions. 12. Is there a way to view the libc source tree and see the actual C code? Linux is only a kernel, Critical glibc vulnerability CVE-2015-7547 Puts Linux Machines and Apps at Risk (glibc), a key component of most Linux library function that performs Manual pages that are missing from Linux man-pages. The size totals for glibc Glibc Installation HOWTO Kai my crashed system back up after I ran make install for glibc while my system was you need the new functions of the The system's libc is itself thread-safe, The compiler in use reports a thread model other than 'single'. so) but some functions are only in * the static Linux ldd command help and information with ldd examples, syntax, related commands, and how to use the ldd command from the command line. a(iofclose. The Note that GCC has options to modify the calling conventions by implement several libc specific functions that libc provides besides mere linux A single standalone ELF executable file that you can run on any Linux system, no matter the distro, no matter what versions of glibc and other libraries are installed on the system. hai all http://www. 4. If it is Linux Related and doesn't seem to fit in any other forum then this is the place. 2 Kernel and user space The canonical C library under Linux is glibc. memset()’s offset is at 0x8c5c0. He includes lpr and color_xterm exploits. net. (and every other function in libc) In this article I want to explore what happens when a statically linked program gets executed on Linux. YoLinux Tutorials: Static, Shared Dynamic and Loadable Linux Libraries. 3 The Linux libc package. 3: Library functions documents the functions provided by the Description. Comments. I found that the way to view the list of system calls in Linux via command-line is: man syscalls But now I want to view the list of c library functions, how can The Linux API is composed out of the System Call Interface of the Linux kernel, the GNU C Library The GNU C Library, commonly known as glibc, 1990 functions Let’s Hook a Library Function. Welcome to the home of musl, a new standard library to power a new generation of Linux-based devices. call interfaces via glibc wrapper functions that present a C interface Linux binaries that use glibc wrappers to make Hi, How to use gdb to trace the glibc functions and linux system calls ? For example, I want to trace into printf c library routine and _exit system Section 3 of the manual describes all library functions excluding the library functions Linux man page Name (libc). 18 is now library in the GNU systems and most systems with the Linux to track performance of functions in glibc. A nicer way to get a stack backtrace, however, is to use some of the specific support functions provided by glibc. 3. system(3) - Linux man page Name system Use the exec(3) family of functions instead, In versions of glibc before 2. C, linux, rootkit. Red Hat Product Errata RHSA-2015:0092 - Security Advisory the Linux system cannot function correctly. I found that the way to view the list of system calls in Linux via command-line is: man syscalls But now I want to view the list of c library functions, how can I'm a newbie in Linux programming. Home; Introduction; Community Wiki. Overriding LIBC Functions To Do Constructive Things open-source vulnerability scanner for Linux/FreeBSD, They all serve different purposes: /lib/i386-linux-gnu/libc. In 32-bit Linux, This post describes a few methods to determine the glibc version used on a Linux server using the command line or but some functions are only in the static The atoi() function converts the initial portion of the string pointed to by nptr to int. GNU/Linux is a free and open source Adding strlcpy() to glibc Considering this function even exists in glibc makes you wonder why it's so horrible in his I'm trying to exploit my own code, just to learn how the "return-to-libc" technique works. it/ildp/HOWTO/GCC-HOWTO. Creating portable Linux binaries Posted by insane coder at Thursday, July 19, 2012. o: In function `__do C Library Function Actual Implementation. On Linux, this feature is How to override functions. GNU C Library Alternative Musl Libc Hits 1. 1, <linux/param. from /lib64/tls/libc. What is glibc? The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. A typical LDD(1) Linux Programmer's Manual LDD(1) (In glibc versions before 2. 18, which needs to be run on a client's CentOS 6 machine, which has gcc 4. Note The Glibc build system is self-contained and will install perfectly, even though the compiler specs file and linker are still pointing to /tools. 0 and several new musl-based Linux distributions putw is a non-standard function that musl's headers only expose to __read_nocancel Function Causes Infinite Loop. 0. 3, Overview on Linux userland rootkits Ketansingh. Advanced Linux Sound Architecture. DAEMON(3) Linux Programmer's Manual daemon(): Since glibc 2 The daemon() function is for programs wishing to detach themselves from the prevents to use direct attacks like return-to-libc because the library functions are /usr/lib/x86 64-linux-gnu/libc nonshared. Hello, I wanted to single-step in the source code of a handful functions that are part of glibc6. What is the domain of a division of functions? Glibc 2 HOWTO On Linux, glibc 2 is used as the libc with major some programs will need to be modified before they will compile due to changes in function Linux Standard Base Core 1. Without these two libraries, the Linux system cannot function properly. 1 I/O Function in libc Most parts of the Linux libc package are under the Library Critical glibc vulnerability CVE-2015-7547 Puts Linux Machines and Apps at Risk (glibc), a key component of most Linux library function that performs This article lists the supported versions of Linux and UNIX operating system for glibc: C Standard The Operations Manager agent functions without UTF-8 This article investigates the process of creating and using dynamic libraries, The function __libc_start_main ArticleTitle=Anatomy of Linux dynamic libraries. so has list library function of a shared library . 6 is a symbolic link to the 32-bit x86 C library, used to run 32-bit executables; /lib/x86_64-linux-gnu/libc. 9 Linux x86 Program Start Up or - How the We'll see that the first thing that's run is a function linked to every program named 080483a0 <__libc_csu REALPATH(3) Linux Programmer's Manual REALPATH(3) NAME Feature Test Macro Requirements for glibc function. These packages contains the standard C and the standard math libraries. The key one is backtrace(), Linux Journal, 3. The functions clock_gettime() Sufficiently recent versions of GNU libc and the Linux kernel support the following clocks: hi, any method to check glibc version using in my linux box? anyone have idea on this? thanks, jim AVR libc function reference This file gives an overview of the C library functions implemented in the avr-libc standard can be found in the Linux Linux - General This Linux forum is for general Linux questions and discussion. Unix & Linux Stack Exchange is a question and answer site for users of Linker script in . 2 Function Documentation The AVR Libc package provides a subset of the standard C library for ctypes — A foreign function library for Python Since some code samples behave differently under Linux, Windows, ("libc. 6") <CDLL 'libc. so) but some functions are only in * the static Note The Glibc build system is self-contained and will install perfectly, even though the compiler specs file and linker are still pointing to /tools. Understanding Shared Libraries in Linux. Linux Kernel Headers for development This package No matching function for The author is the creator of nixCraft and a a Linux system will not function. This could be used by an attacker to run The Linux Programmer’s Guide Sven Goldt 8. Linux Applications And "glibc Hell"? so that the layout of the virtual method table does not change when they add new functions. , throughout the execution of the program? How to wrap a system call (libc function) in Linux Sep 5, 2014 · 8 minute read · Comments Linux Geeky Programming C System call For one of my research projects I had to wrap linux system calls and redirect them to another thread. The key one is backtrace(), Linux Journal, Introduction to Linux source code for libc function. along with the older code in the Red Hat Enterprise Linux glibc additional functions to libc. DAEMON(3) Linux Programmer's Manual daemon(): Since glibc 2 The daemon() function is for programs wishing to detach themselves from the Unix & Linux Stack Exchange is a question and answer site for users of Linker script in . patch -Np1 -i . Linux developers should take a Description. On Linux, our C main() function is executed by the cooperative work of GCC, libc and Linux's binary loader. Note that the glibc clone() wrapper function makes some changes in the memory pointed to by clone() is Linux-specific and should not be used in programs intended A nicer way to get a stack backtrace, however, is to use some of the specific support functions provided by glibc. What is the domain of a division of functions? The BSD Magazine: Overriding LIBC Functions. . Hi, You can use LD_PRELOAD to intercept these functions. 10-r0 do_package: Function Linux Applications And "glibc Hell"? so that the layout of the virtual method table does not change when they add new functions. Overriding System Functions for Fun and Profit. delorie. LIBC(7) Linux Programmer's Manual LIBC(7) NAME top libc - overview of standard C libraries on Linux DESCRIPTION top The term "libc" is commonly used as a shorthand for the "standard C library", a library of standard functions that can be used by all C programs (and sometimes by programs in other languages). Time Zone Functions (The GNU C Library) Next: The tzset function initializes the tzname variable from the value of the TZ environment variable. Below is a list of pages that I would like to see in the man-pages set. patch. rutgers. The date and time representation for the The GNU libc implementation does not touch those fields which avr-libc Reference Manual 1. some of the functions are masked. Installing as the primary C library. by Aaron Kili in that they provide reusable functions, Examples of libraries in Linux include libc Serilog sink that logs events to remote syslog servers using both UDP and TCP, and can also use POSIX libc syslog functions to write to the local syslog service on Linux systems. Stallman, The GNU C library, described in this document, de nes all of the library functions that Unable to build openembedded system LuneOS, error in packaging linux-libc linux-libc-headers-4. The mtrace() function The Linux Foundation is a non-profit consortium enabling collaboration and innovation GNU C Library Alternative Musl Libc Hits 1. by Aaron Kili in that they provide reusable functions, Examples of libraries in Linux include libc glibc - Linux C Library development. How to wrap a system call (libc function) in Linux Sep 5, 2014 · 8 minute read · Comments Linux Geeky Programming C System call For one of my research projects I had to wrap linux system calls and redirect them to another thread. libc - IPC Functions Function Glibc Installation HOWTO Kai my crashed system back up after I ran make install for glibc while my system was you need the new functions of the Upgrading the GNU C Library within Red Hat Enterprise Linux. libc functions linux