puts(3) — Linux manual page

puts(3)                 Library Functions Manual                 puts(3)

NAME

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

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <stdio.h>

       int fputc(int c, FILE *stream);
       int putc(int c, FILE *stream);
       int putchar(int c);

       int fputs(const char *restrict s, FILE *restrict stream);
       int puts(const char *s);

DESCRIPTION

       fputc() writes the character c, cast to an unsigned char, to
       stream.

       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).

       fputs() writes the string s to stream, without its terminating
       null byte ('\0').

       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(),           │ Thread safety │ MT-Safe │
       │ putchar(), puts()                   │               │         │
       └─────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       POSIX.1-2001, 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 the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.9.1          2024-06-15                        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)

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