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standard/ulimit(2) -- get and set user limits
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This function provides for control over process limits. The cmd values available are: UL_GETFSIZE Get the regular file size limit of the process. The limit is in units of 512-byte blocks and is inherited by child processes. Files of any size can be read. UL_SETFSIZE Set the regular file size limit of the process to the value of newlimit , taken as a long. newlimit is interpreted in units of 512-byte blocks. If, when converte... |
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standard/umask(2) -- set and get file creation mask
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umask sets the process's file mode creation mask to cmask and returns the previous value of the mask. Only the access permission bits of cmask and the file mode creation mask are used. |
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standard/umount(2) -- unmount a file system
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umount requests that a previously mounted file system contained on the block special device or directory identified by file be unmounted. file is a pointer to a path name. After unmounting the file system, the directory upon which the file system was mounted reverts to its ordinary interpretation. umount may be invoked only by a process with the super-user privilege. umount will fail if one or more of the following are true: EPER<... |
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standard/uname(2) -- get name of current UNIX system
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uname stores information identifying the current UNIX system in the structure pointed to by name. uname uses the structure utsname defined in <sys/utsname.h> whose members are: char sysname[SYS_NMLN]; char nodename[SYS_NMLN]; char release[... |
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standard/unlink(2) -- remove directory entry
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unlink removes the directory entry named by the path name pointed to by path. and decrements the link count of the file referenced by the directory entry. When all links to a file have been removed and no process has the file open, the space occupied by the file is freed and the file ceases to exist. If one or more processes have the file open when the last link is removed, space occupied by the file is not released until all references to the file have been closed. If path is ... |
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standard/ustat(2) -- get file system statistics
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ustat returns information about a mounted file system. dev is a device number identifying a device containing a mounted file system [see makedev(3C)]. buf is a pointer to a ustat structure that includes the following elements: daddr_t f_tfree; /* Total free blocks */ ino_t f_tinode; /* Number... |
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standard/utime(2) -- set file access and modification times
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path points to a path name naming a file. utime sets the access and modification times of the named file. If times is NULL, the access and modification times of the file are set to the current time. A process must be the owner of the file or have write permission to use utime in this manner. If times is not NULL, times is interpreted as a pointer to a utimbuf structure (defined in utime.h) and the ... |
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standard/utimets(2) -- set file access and modification times
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The utimets call uses the "accessed" and "updated" times in that order from the timets vector to set the corresponding recorded times for file. The caller must be the owner of the file or have write permission to use utimets in this manner. This routine is not part of any standard and is specific to IRIX 6.5.10 and later. Applications that call utimets may be run under earlier versions of IRIX if they test for the existence of the interface and fall back to using one of the older file time s... |
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standard/vhangup(2) -- virtually ``hangup'' the current control terminal
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Vhangup is used by the initialization process init(1M) (among others) to arrange that users are given "clean"' terminals at login, by revoking access of the previous users' processes to the terminal. To effect this, vhangup searches the system tables for references to the control terminal of the invoking process, revoking access permissions on each instance of the terminal that it finds. Further attempts to access the terminal by the affected processes will yield i/o errors (EIO). Finally, a... |
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standard/wait(2) -- wait for child processes to stop or terminate
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wait suspends the calling process until one of the immediate children terminate, or until a child that is being traced stops because it has hit an event of interest. The wait will return prematurely if a signal is received. If all child processes stopped or terminated prior to the call on wait, return is immediate. If the call is successful, the process ID of a child is returned. wait3 is BSD's extension of wait. It provides an alte... |
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standard/waitid(2) -- wait for child process to change state
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waitid suspends the calling process until one of its children changes state. It records the current state of a child in the structure pointed to by infop. If a child process changed state prior to the call to waitid, waitid returns immediately. The idtype and id arguments specify which children waitid is to wait for. If idtype is P_PID, waitid waits for the child with a process ID equal to (<... |
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standard/write(2) -- write on a file
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write attempts to write nbyte bytes from the buffer pointed to by buf to the file associated with fildes. If nbyte is zero and the file is a regular file, write returns zero and has no other results. fildes is a file descriptor obtained from a creat, open, dup, fcntl, pipe, or ioctl system call. pwrite and pwrite64 are the same as writ<... |
