NAME
puts — put a
string on standard output
SYNOPSIS
#include
<stdio.h>
int puts(const char *s);
DESCRIPTION
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C standard.
The puts () function shall write
the string pointed to by
s, followed by a
<newline>, to the standard output stream
stdout.
The terminating null byte shall not be written.
[CX] The last data modification and last file
status change timestamps of the file shall be marked for update between the
successful execution of puts () and the next
successful completion of a call to fflush(3) or
fclose(3) on the same stream or a call to
exit(3) or abort(3).
RETURN VALUE
Upon successful completion, puts () shall
return a non-negative number. Otherwise, it shall return EOF, shall set an
error indicator for the stream, [CX] and
errno
shall be set to indicate the error.
ERRORS
Refer to fputc(3) .
EXAMPLES
Printing to Standard Output
The following example gets the current time, converts it to a
string using localtime(3) and
asctime(3), and prints it to standard output using
puts (). It then prints the number of minutes to an
event for which it is waiting.
#include <time.h>
#include <stdio.h>
...
time_t now;
int minutes_to_event;
...
time(&now);
printf("The time is ");
puts(asctime(localtime(&now)));
printf("There are %d minutes to the event.\n",
minutes_to_event);
...
APPLICATION USAGE
The puts () function appends a
<newline>, while fputs(3) does not.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
XBD <stdio.h>
CHANGE HISTORY
First released in Issue 1. Derived from Issue 1 of the SVID.
Issue 6
Extensions beyond the ISO C standard are marked.
Issue 7
Changes are made related to support for finegrained timestamps.