strpct(3) [netbsd man page]

STRPCT(3)						   BSD Library Functions Manual 						 STRPCT(3)

NAME

     strpct, strspct -- decimal percent formatters

LIBRARY

     System Utilities Library (libutil, -lutil)

SYNOPSIS

     #include <util.h>

     char *
     strpct(char *buf, size_t bufsiz, uintmax_t numerator, uintmax_t denominator, size_t precision);

     char *
     strspct(char *buf, size_t bufsiz, intmax_t numerator, intmax_t denominator, size_t precision);

DESCRIPTION

     The strpct() function formats the fraction represented by numerator and denominator into a percentage representation with given number of
     digits of precision without using floating point arithmetic.

RETURN VALUES

     strpct() and strspct() always return a pointer to a NUL-terminated (unless buflen is 0) formatted string which is placed in buf and is up to
     buflen characters.  If there was an overflow, the formatted string will reflect that precision loss.

EXAMPLES

	   strpct(buf, buflen, 1, 16, 3);
	   => "6.250"
	   strpct(buf, buflen, 1, 2, 0);
	   => "50"

HISTORY

     strpct() was originally implemented in csh(1) for NetBSD 1.3.  It printed into a static buffer, was not locale aware, handled unsigned long
     numbers, and printed a ``%'' at the end of the number.  Other programs such as df(1) and time(1) started using it.  strpct() and strspct()
     appeared separately in libutil for NetBSD 6.0.

AUTHORS

     Erik E. Fair <fair@netbsd.org>

BSD
								  January 7, 2012							       BSD

OPENDISK(3)						   BSD Library Functions Manual 					       OPENDISK(3)

NAME

     opendisk -- open a disk partition

LIBRARY

     System Utilities Library (libutil, -lutil)

SYNOPSIS

     #include <util.h>

     int
     opendisk(const char *path, int flags, char *buf, size_t buflen, int iscooked);

DESCRIPTION

     opendisk() opens path, for reading and/or writing as specified by the argument flags using open(2), and the file descriptor is returned to
     the caller.  buf is used to store the resultant filename.	buflen is the size, in bytes, of the array referenced by buf (usually MAXPATHLEN
     bytes).  iscooked controls which paths in /dev are tried.

     opendisk() attempts to open the following variations of path, in order:

     path	  The pathname as given.

     pathX	  path with a suffix of 'X', where 'X' represents the raw partition of the device, as determined by getrawpartition(3), usually
		  ``c''.

     If path does not contain a slash (``/''), the following variations are attempted:

	   -   If iscooked is zero:

	       /dev/rpath   path with a prefix of ``/dev/r''.

	       /dev/rpathX  path with a prefix of ``/dev/r'' and a suffix of 'X' (q.v.).

	   -   If iscooked is non-zero:

	       /dev/path    path with a prefix of ``/dev/''.

	       /dev/pathX   path with a prefix of ``/dev/'' and a suffix of 'X' (q.v.).

RETURN VALUES

     An open file descriptor, or -1 if the open(2) failed.

ERRORS

     opendisk() may set errno to one of the following values:

     [EINVAL]		O_CREAT was set in flags, or getrawpartition(3) didn't return a valid partition.

     [EFAULT]		buf was the NULL pointer.

     The opendisk() function may also set errno to any value specified by the open(2) function.

SEE ALSO

     open(2), getrawpartition(3)

HISTORY

     The opendisk() function first appeared in NetBSD 1.3.

BSD
								 December 11, 2001							       BSD