Manual browser: opendisk(3)
|OPENDISK(3)||Library Functions Manual||OPENDISK(3)|
NAMEopendisk — open a disk partition
LIBRARYSystem Utilities Library (libutil, -lutil)
opendisk(const char *path, int flags, char *buf, size_t buflen, int iscooked);
DESCRIPTIONopendisk() 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:
- The pathname as given.
- 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:
- path with a prefix of “/dev/r”.
- path with a prefix of “/dev/r” and a suffix of ‘X’ (q.v.).
If iscooked is non-zero:
- path with a prefix of “/dev/”.
- path with a prefix of “/dev/” and a suffix of ‘X’ (q.v.).
RETURN VALUESAn open file descriptor, or -1 if the open(2) failed.
ERRORSopendisk() may set errno to one of the following values:
- O_CREAT was set in flags, or getrawpartition(3) didn't return a valid partition.
- buf was the NULL pointer.
The opendisk() function may also set errno to any value specified by the open(2) function.
SEE ALSOopen(2), getrawpartition(3)
HISTORYThe opendisk() function first appeared in NetBSD 1.3.
|December 11, 2001||NetBSD 7.0|