fputc(3p) — Linux manual page


FPUTC(3P)                 POSIX Programmer's Manual                FPUTC(3P)

PROLOG         top

       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         top

       fputc — put a byte on a stream

SYNOPSIS         top

       #include <stdio.h>

       int fputc(int c, FILE *stream);

DESCRIPTION         top

       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 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         top

       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         top

       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

       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         top




RATIONALE         top




SEE ALSO         top

       Section 2.5, Standard I/O Streams, ferror(3p), fopen(3p),
       getrlimit(3p), putc(3p), puts(3p), setbuf(3p), ulimit(3p)

       The Base Definitions volume of POSIX.1‐2008, stdio.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) 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.unix.org/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 .

IEEE/The Open Group                 2013                           FPUTC(3P)

Pages that refer to this page: stdio.h(0p)fprintf(3p)fputs(3p)fwrite(3p)perror(3p)psiginfo(3p)psignal(3p)putc(3p)putchar(3p)puts(3p)