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chmod(2) -- change mode of file
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The function chmod() sets the file permission bits of the file specified by the pathname path to mode. fchmod() sets the permission bits of the specified file descriptor fd. lchmod() is like chmod() e... |
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chown(2) -- change owner and group of a file
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The owner ID and group ID of the file named by path or referenced by fd is changed as specified by the arguments owner and group. The owner of a file may change the group to a group of which he or she... |
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chroot(2) -- change root directory
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dirname is the address of the pathname of a directory, terminated by an ASCII NUL. chroot() causes dirname to become the root directory, that is, the starting point for path searches of pathnames begi... |
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clock_getres(2) -- clock and timer functions
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The clock_settime() function sets the clock identified by clock_id to the absolute time specified by tp. If the time specified by tp is not a multiple of the resolution of the clock, tp is truncated t... |
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clock_gettime(2) -- clock and timer functions
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The clock_settime() function sets the clock identified by clock_id to the absolute time specified by tp. If the time specified by tp is not a multiple of the resolution of the clock, tp is truncated t... |
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clock_settime(2) -- clock and timer functions
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The clock_settime() function sets the clock identified by clock_id to the absolute time specified by tp. If the time specified by tp is not a multiple of the resolution of the clock, tp is truncated t... |
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clone(2) -- spawn new process with options
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The clone system call (and associated library support code) creates a new process in a way that allows the caller to specify several options for the new process creation. Unlike fork(2) or vfork(2), i... |
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close(2) -- delete a descriptor
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The close() system call deletes a descriptor from the per-process object reference table. If this is the last reference to the underlying object, the object will be deactivated. For example, on the la... |
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connect(2) -- initiate a connection on a socket
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The parameter s is a socket. If it is of type SOCK_DGRAM, this call specifies the peer with which the socket is to be associated; this address is that to which datagrams are to be sent, and the only a... |
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dup(2) -- duplicate an existing file descriptor
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dup() duplicates an existing object descriptor and returns its value to the calling process (newd = dup(oldd)). The argument oldd is a small non-negative integer index in the per-process descriptor ta... |
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dup2(2) -- duplicate an existing file descriptor
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dup() duplicates an existing object descriptor and returns its value to the calling process (newd = dup(oldd)). The argument oldd is a small non-negative integer index in the per-process descriptor ta... |
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errno(2) -- introduction to system calls and error numbers
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This section provides an overview of the system calls, their error returns, and other common definitions and concepts. |
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execve(2) -- execute a file
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execve() transforms the calling process into a new process. The new process is constructed from an ordinary file, whose name is pointed to by path, called the new process file. This file is either an ... |
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fchdir(2) -- change current working directory
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The path argument points to the pathname of a directory. The chdir() function causes the named directory to become the current working directory, that is, the starting point for path searches of pathn... |
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fchflags(2) -- set file flags
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The file whose name is given by path or referenced by the descriptor fd has its flags changed to flags. For lchflags(), symbolic links are not traversed and thus their modes may be changed with this c... |
