What Are The Unix System Calls For I/o?

1.	What Are The Unix System Calls For I/o?
Answer» open(PATHNAME,flag,mode) - open FILE creat(pathname,mode) - create file close(filedes) - close an open file read(filedes,buffer,bytes) - read data from an open file write(filedes,buffer,bytes) - write data to an open file lseek(filedes,offset,from) - position an open file dup(filedes) - duplicate an existing file descriptor dup2(oldfd,newfd) - duplicate to a desired file descriptor fcntl(filedes,cmd,ARG) - CHANGE properties of an open file IOCTL(filedes,request,arg) - change the behaviour of an open file The difference between fcntl anf ioctl is that the former is intended for any open file, while the latter is for device-specific operations. The difference between fcntl anf ioctl is that the former is intended for any open file, while the latter is for device-specific operations.

Answer»

The difference between fcntl anf ioctl is that the former is intended for any open file, while the latter is for device-specific operations.

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