8. Linux System Calls
SO FAR, WE’VE PRESENTED A VARIETY OF FUNCTIONS that your program can invoke to perform system-related functions, such as parsing command-line options, manipulating processes, and mapping memory. If you look under the hood, you’ll find that these functions fall into two categories, based on how they are implemented.
• A library function is an ordinary function that resides in a library external to your program. Most of the library functions we’ve presented so far are in the standard C library, libc. For example, getopt_long and mkstemp are functions provided in the C library.
A call to a library function is just ...
Get Advanced Linux Programming now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
