plucky (3) fputc.3posix.gz

Provided by: manpages-posix-dev_2017a-2_all bug

PROLOG
       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.


NAME
       fputc — put a byte on a stream


SYNOPSIS
       #include <stdio.h>

       int fputc(int c, FILE *stream);


DESCRIPTION
       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.1‐2017 defers to the ISO C standard.

       The  fputc()  function  shall write the byte specified by c (converted to an unsigned char) to the output
       stream pointed to by stream, at the position indicated by the associated file-position indicator for  the
       stream  (if  defined),  and  shall  advance  the  indicator  appropriately.   If  the file cannot support
       positioning requests, or if the stream was opened with append mode, the byte shall  be  appended  to  the
       output stream.

       The  last data modification and last file status change timestamps of the file shall be marked for update
       between the successful execution of fputc() and the next successful completion of a call to  fflush()  or
       fclose() on the same stream or a call to exit() or abort().


RETURN VALUE
       Upon  successful  completion,  fputc()  shall return the value it has written. Otherwise, it shall return
       EOF, the error indicator for the stream shall be set, and errno shall be set to indicate the error.


ERRORS
       The fputc() function shall fail if either the stream is unbuffered or the stream's  buffer  needs  to  be
       flushed, and:

       EAGAIN The  O_NONBLOCK  flag  is  set  for  the file descriptor underlying stream and the thread would be
              delayed in the write operation.

       EBADF  The file descriptor underlying stream is not a valid file descriptor open for writing.

       EFBIG  An attempt was made to write to a file that exceeds the maximum file size.

       EFBIG  An attempt was made to write to a file that exceeds the file size limit of the process.

       EFBIG  The file is a regular file and an attempt was made to write at or beyond the offset maximum.

       EINTR  The write operation was terminated due to the receipt of a signal, and no data was transferred.

       EIO    A physical I/O error has occurred, or the process is  a  member  of  a  background  process  group
              attempting to write to its controlling terminal, TOSTOP is set, the calling thread is not blocking
              SIGTTOU, the process is not ignoring SIGTTOU, and the process group of the  process  is  orphaned.
              This error may also be returned under implementation-defined conditions.

       ENOSPC There was no free space remaining on the device containing the file.

       EPIPE  An  attempt  is  made  to  write  to a pipe or FIFO that is not open for reading by any process. A
              SIGPIPE signal shall also be sent to the thread.

       The fputc() function may fail if:

       ENOMEM Insufficient storage space is available.

       ENXIO  A request was made of a nonexistent device, or the request was outside  the  capabilities  of  the
              device.

       The following sections are informative.


EXAMPLES
       None.


APPLICATION USAGE
       None.


RATIONALE
       None.


FUTURE DIRECTIONS
       None.


SEE ALSO
       Section 2.5, Standard I/O Streams, ferror(), fopen(), getrlimit(), putc(), puts(), setbuf(), ulimit()

       The Base Definitions volume of POSIX.1‐2017, <stdio.h>


       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any discrepancy between this version and the original
       IEEE  and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document.
       The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have  been  introduced
       during   the   conversion  of  the  source  files  to  man  page  format.  To  report  such  errors,  see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .