Manpage of GETS

GETS

Section: Linux Programmer's Manual (3)
Updated: 2015-03-02
Index
 

NAME

gets - get a string from standard input (DEPRECATED)  

SYNOPSIS

#include <stdio.h>char *gets(char *s);
 

DESCRIPTION

Never use this function.

gets() reads a line from stdininto the buffer pointed to by suntil either a terminating newline or EOF, which it replaces with a null byte (aq\0aq). No check for buffer overrun is performed (see BUGS below).  

RETURN VALUE

gets() returns son success, and NULL on error or when end of file occurs while no characters have been read. However, given the lack of buffer overrun checking, there can be no guarantees that the function will even return.  

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
gets() Thread safetyMT-Safe

 

CONFORMING TO

C89, C99, POSIX.1-2001.

LSB deprecates gets(). POSIX.1-2008 marks gets() obsolescent. ISO C11 removes the specification of gets() from the C language, and since version 2.16, glibc header files don't expose the function declaration if the _ISOC11_SOURCEfeature test macro is defined.  

BUGS

Never use gets(). Because it is impossible to tell without knowing the data in advance how many characters gets() will read, and because gets() will continue to store characters past the end of the buffer, it is extremely dangerous to use. It has been used to break computer security. Use fgets() instead.

For more information, see CWE-242 (aka "Use of Inherently Dangerous Function") at http://cwe.mitre.org/data/definitions/242.html 

SEE ALSO

read(2), write(2), ferror(3), fgetc(3), fgets(3), fgetwc(3), fgetws(3), fopen(3), fread(3), fseek(3), getline(3), getwchar(3), puts(3), scanf(3), ungetwc(3), unlocked_stdio(3), feature_test_macros(7)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
CONFORMING TO
BUGS
SEE ALSO

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