NAME

fputs, puts — output a line to a stream

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <stdio.h>

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

int
puts(const char *s);

DESCRIPTION

The function fputs() writes the string pointed to by s to the stream pointed to by stream.

The function puts() writes the string s, and a terminating newline character, to the stream stdout.

RETURN VALUES

The functions fputs() and puts() return a nonnegative integer on success and EOF on error.

ERRORS

[EBADF]

The stream argument is not a writable stream.

The functions fputs() and puts() may also fail and set errno for any of the errors specified for the routines write(2).

COMPATIBILITY

fputs() now returns a non-negative number (as opposed to 0) on successful completion. As a result, many tests (e.g., "fputs() == 0", "fputs() != 0") do not give the desired result. Use "fputs() != EOF" or "fputs() == EOF" to determine success or failure.

SEE ALSO

ferror(3), fputws(3), putc(3), stdio(3)

STANDARDS

The functions fputs() and puts() conform to ISO/IEC 9899:1990 (“ISO C90”). While not mentioned in the standard, both fputs() and puts() print ‘(null)’ if str is NULL.