check
man read.
On success, the number of bytes read is returned.
abhijeet
On Tue, 2004-03-23 at 18:59, Devdas Bhagat wrote:
> On 23/03/04 03:44 -0800, Linux User wrote:
> <snip>
> > while(n = read(fd,buff,sizeof(buff)) > 0){
> This will be parsed as
> while (n = (read(fd, buff, sizeof(buff)) > 0)) {
> The result of the bracket around read is 1, since the return value of
> read is > 0 and hence the condition evaluates to true.
>
> /* Bad code follows */
>
> /*
> * The OP should tell us why he/she is using read and write instead of
> * fread and fwrite, or perhaps rename to move the file instead
> */
> while (fd) {
> n = read(fd, buff, sizeof(buff));
> if (n = -1) {
> perror("Read failed: ");
> exit(n);
> }
>
> if (n < sizeof(buff)) { /* Short read, eof? */
> close_check = close(fd); /* Close file */
> /*
> * We had an error while closing the file
> * Alert to see if the disk is full, or corrupted.
> */
> if (close_check = -1) {
> perror("File close failed, disk full?: ");
> }
> }
>
> /* Insert code for writes here */
> }
>
> Devdas Bhagat
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