Implementation status: partially implemented


#include <stdio.h>

int fputs(const char *str, FILE *stream);


Writes a string to the specified stream up to but not including the terminating null character.

Return value

Upon successful completion, fputs() returns the number of bytes written if it is up to {INT_MAX} bytes, and returns {INT_MAX} for all longer strings.
Otherwise, it returns EOF, sets an error indicator for the stream, and sets errno to indicate the error.


[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.
[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 is also sent to the thread.
[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.

Implementation tasks

  • Implement error handling for the function