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.

ATTRIBUTES
       For an explanation of the terms used in this section, see attributes(7).

       ┌──────────┬───────────────┬─────────┐
       │Interface Attribute     Value   │
       ├──────────┼───────────────┼─────────┤
       │gets()    │ Thread safety │ MT-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_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 4.00 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                                2015-03-02                            GETS(3)

Locations of this man page

SystemPackageVersionNameFilename
Arch Linuxcore/man-pages4.00-1gets.3/usr/share/man/man3/gets.3.gz