sockets/read_line_buf.h

This is sockets/read_line_buf.h, an example to accompany the book, The Linux Programming Interface.

This file is not printed in the book; it is the solution to Exercise 59-1:b (page 1236).

The source code file is copyright 2024, Michael Kerrisk, and is licensed under the GNU Lesser General Public License, version 3.

In the listing below, the names of Linux system calls and C library functions are hyperlinked to manual pages from the Linux man-pages project, and the names of functions implemented in the book are hyperlinked to the implementations of those functions.

 

Download sockets/read_line_buf.h

  Cover of The Linux Programming Interface
/* read_line_buf.h

   Header file for read_line_buf.c (implementation of readLineBuf()).
*/
#ifndef READ_LINE_BUF_H         /* Prevent accidental double inclusion */
#define READ_LINE_BUF_H

#include <unistd.h>
#include <pthread.h>
#include <errno.h>

#define RL_MAX_BUF 10

struct ReadLineBuf {
    int     fd;                 /* File descriptor from which to read */
    char    buf[RL_MAX_BUF];    /* Current buffer from file */
    int     next;               /* Index of next unread character in 'buf' */
    ssize_t len;                /* Number of characters in 'buf' */
};

void readLineBufInit(int fd, struct ReadLineBuf *rlbuf);

ssize_t readLineBuf(struct ReadLineBuf *rlbuf, char *buffer, size_t n);

#endif

 

Download sockets/read_line_buf.h

Note that, in most cases, the programs rendered in these web pages are not free standing: you'll typically also need a few other source files (mostly in the lib/ subdirectory) as well. Generally, it's easier to just download the entire source tarball and build the programs with make(1). By hovering your mouse over the various hyperlinked include files and function calls above, you can see which other source files this file depends on.

Valid XHTML 1.1