Table of Contentswrite - write to a file descriptor #include <sys/types.h>
#include <unistd.h> size_t write(int fd, const char *buf, size_t count);
write writes up to count bytes from file descriptor fd from the buffer starting at buf. On success, the number of bytes written are returned (zero indicates end of file). On error, -1 (or MAXINT, as size_t is unsigned) is returned, and errno is set appropriately. - EBADF
- fd is not a valid file descriptor or is not open for writing.
- EINVAL
- fd is attached to an object which is unsuitable for writing.
- EFAULT
- buf is outside your accessible address space.
- EPIPE
- fd is connected to a pipe or socket whose reading end is closed. When this happens the writing process will receive a SIGPIPE signal; if it catches, blocks or ignores this the error EPIPE is returned.
- EAGAIN
- Non-blocking I/O has been selected using O_NONBLOCK and there was no room in the pipe or socket connected to fd to write the data immediately.
- EINTR
- The call was interrupted by a signal before any data was written.
- ENOSPC
- The device containing the file referred to by fd has no room for the data.
Other errors may occur, depending on the object connected to fd.
SVID, AT&T, POSIX, X/OPEN, BSD 4.3 open(2), read(2), fcntl(2), close(2), lseek(2), select(2), ioctl(2), fwrite(3).
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