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snprintf provides a level of safety over sprintf since the caller provides a length (n) parameter that specifies the maximum number or chars to write to the buffer. For most printf-family functions, there is a variant that accepts va_list rather than a variable length parameter list. For example, there is a vfprintf, vsprintf, vsnprintf.
The C programming language provides many standard library functions for file input and output.These functions make up the bulk of the C standard library header <stdio.h>. [1] The functionality descends from a "portable I/O package" written by Mike Lesk at Bell Labs in the early 1970s, [2] and officially became part of the Unix operating system in Version 7.
Uncontrolled format string is a type of code injection vulnerability discovered around 1989 that can be used in security exploits. [1] Originally thought harmless, format string exploits can be used to crash a program or to execute harmful code.
Visualization of a software buffer overflow. Data is written into A, but is too large to fit within A, so it overflows into B.. In programming and information security, a buffer overflow or buffer overrun is an anomaly whereby a program writes data to a buffer beyond the buffer's allocated memory, overwriting adjacent memory locations.
In computing, position-independent code [1] (PIC [1]) or position-independent executable (PIE) [2] is a body of machine code that executes properly regardless of its memory address.
The article implies that snprintf was only added to C in 1999. On the contrary it is very old. It first appeared in UNIX compilers before the first C standard (1989) but after that most compilers renamed it to _snprintf as it was not in the standard library. AndrewWPhillips 04:46, 9 November 2010 (UTC)
Bionic is an implementation of the C standard library, developed by Google for its Android operating system.It differs from the GNU C Library (glibc) in being designed for devices with less memory and processor power than a typical Linux system.
The GNU C Library, commonly known as glibc, is the GNU Project implementation of the C standard library.It provides a wrapper around the system calls of the Linux kernel and other kernels for application use.