gets source

GETS(3)                     Linux Programmer's Manual                    GETS(3)



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  stdin into the buffer pointed to by s until
       either a terminating newline or EOF, which it replaces with a  null  byte
       ('\0').  No check for buffer overrun is performed (see BUGS below).

RETURN VALUE
       gets() returns s on 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.

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_SOURCE feature 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)

COLOPHON
       This page is part of release 3.73 of  the  Linux  man-pages  project.   A
       description  of  the  project,  information about reporting bugs, and the
       latest    version    of    this     page,     can     be     found     at
       http://www.kernel.org/doc/man-pages/.



GNU                                2014-01-24                            GETS(3)

Locations of this man page

SystemPackageVersionNameFilename
Arch Linuxcore/man-pages3.73-1gets.3/usr/share/man/man3/gets.3.gz