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A high-level overview of the Linux kernel's system call interface, which handles communication between its various components and the userspace. In computing, a system call (commonly abbreviated to syscall) is the programmatic way in which a computer program requests a service from the operating system [a] on which it is executed.
As strace only details system calls, it cannot be used to detect as many problems as a code debugger such as GNU Debugger (gdb). It is, however, easier to use than a code debugger, and is a very useful tool for system administrators. It is also used by researchers to generate system call traces for later system call replay. [66] [67] [68]
It was started in the 1980s by the Free Software Foundation (FSF) for the GNU operating system. glibc is free software released under the GNU Lesser General Public License. [3] The GNU C Library project provides the core libraries for the GNU system, as well as many systems that use Linux as the kernel.
Download as PDF; Printable version; In other projects Wikidata item; ... Pages in category "System calls" The following 24 pages are in this category, out of 24 total.
The section System Calls [2] of the Newlib documentation describes how it can be used with many operating systems.Its primary use is on embedded systems that lack any kind of operating system; in that case it calls a board support package that can do things like write a byte of output on a serial port, or read a sector from a disk or other memory device.
stat() is a Unix system call that returns file attributes about an inode. The semantics of stat() vary between operating systems. As an example, Unix command ls uses this system call to retrieve information on files that includes: atime: time of last access (ls -lu) mtime: time of last modification (ls -l) ctime: time of last status change (ls -lc)
splice() is one of three system calls that complete the splice() architecture. vmsplice() can map an application data area into a pipe (or vice versa), thus allowing transfers between pipes and user memory where sys_splice() transfers between a file descriptor and a pipe. tee() is the last part of the trilogy. It duplicates one pipe to another ...
The related system call fsync() commits just the buffered data relating to a specified file descriptor. [1] fdatasync() is also available to write out just the changes made to the data in the file, and not necessarily the file's related metadata. [2] Some Unix systems run a kind of flush or update daemon, which calls the sync function on a ...