PUTS
Section: Linux Programmer's Manual (3)
Updated: 2020-12-21
Page Index
NAME
fputc, fputs, putc, putchar, puts - output of characters and strings
SYNOPSIS
#include <stdio.h>
int fputc(int c, FILE *stream);
int fputs(const char *s, FILE *stream);
int putc(int c, FILE *stream);
int putchar(int c);
int puts(const char *s);
DESCRIPTION
fputc()
writes the character
c,
cast to an
unsigned char,
to
stream.
fputs()
writes the string
s
to
stream,
without its terminating null byte ('\0').
putc()
is equivalent to
fputc()
except that it may be implemented as a macro which evaluates
stream
more than once.
putchar(c)
is equivalent to
putc(c, stdout).
puts()
writes the string
s
and a trailing newline
to
stdout.
Calls to the functions described here can be mixed with each other and with
calls to other output functions from the
stdio
library for the same output stream.
For nonlocking counterparts, see
unlocked_stdio(3).
RETURN VALUE
fputc(),
putc(),
and
putchar()
return the character written as an
unsigned char
cast to an
int
or
EOF
on error.
puts()
and
fputs()
return a nonnegative number on success, or
EOF
on error.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
fputc(),
fputs(),
putc(),
putchar(),
puts()
| Thread safety | MT-Safe
|
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C89, C99.
BUGS
It is not advisable to mix calls to output functions from the
stdio
library with low-level calls to
write(2)
for the file descriptor associated with the same output stream; the results
will be undefined and very probably not what you want.
SEE ALSO
write(2),
ferror(3),
fgets(3),
fopen(3),
fputwc(3),
fputws(3),
fseek(3),
fwrite(3),
putwchar(3),
scanf(3),
unlocked_stdio(3)
COLOPHON
This page is part of release 5.10 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
https://www.kernel.org/doc/man-pages/.