puts(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | BUGS | SEE ALSO | COLOPHON

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

NAME         top

       fputc, fputs, putc, putchar, puts - output of characters and
       strings

SYNOPSIS         top

       #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         top

       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         top

       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         top

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

       ┌──────────────────────────┬───────────────┬─────────┐
       │Interface                 Attribute     Value   │
       ├──────────────────────────┼───────────────┼─────────┤
       │fputc(), fputs(), putc(), │ Thread safety │ MT-Safe │
       │putchar(), puts()         │               │         │
       └──────────────────────────┴───────────────┴─────────┘

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008, C89, C99.

BUGS         top

       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         top

       write(2), ferror(3), fgets(3), fopen(3), fputwc(3), fputws(3),
       fseek(3), fwrite(3), putwchar(3), scanf(3), unlocked_stdio(3)

COLOPHON         top

       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/.

GNU                            2020-12-21                        PUTS(3)

Pages that refer to this page: curs_addch(3x)curs_termcap(3x)curs_terminfo(3x)fgetc(3)flockfile(3)fputwc(3)fputws(3)gets(3)getw(3)printf(3)putwchar(3)setbuf(3)stdio(3)