volmgt_release(3volmgt) [opensolaris man page]
volmgt_release(3VOLMGT) Volume Management Library Functions volmgt_release(3VOLMGT) NAME
volmgt_release - release removable media device reservation SYNOPSIS
cc [ flag ... ] file ... -lvolmgt [ library ... ] #include <volmgt.h> int volmgt_release(char *dev); DESCRIPTION
This function is obsolete. The management of removable media by the Volume Management feature, including vold, has been replaced by soft- ware that supports the Hardware Abstraction Layer (HAL). Programmatic support for HAL is through the HAL APIs, which are documented on the HAL web site. See hal(5). The return value of this function is undefined. The volmgt_release() routine releases the removable media device reservation specified as dev. See volmgt_acquire(3VOLMGT) for a descrip- tion of dev. If dev is reserved by the caller, volmgt_release() updates the internal device reservation database to indicate that the device is no longer reserved. If the requested device is reserved by another process, the release attempt fails and errno is set to 0. RETURN VALUES
The return from this function is undefined. ERRORS
On failure, volmgt_release() returns 0, and sets errno for one of the following conditions: EINVAL dev was invalid or missing. EBUSY dev was not reserved by the caller. EXAMPLES
Example 1 Using volmgt_release() In the following example, volume management is running, and the first floppy drive is reserved, accessed and released. #include <volmgt.h> char *errp; if (!volmgt_acquire("floppy0", "FileMgr", 0, &errp, NULL)) { /* handle error case */ ... } /* floppy acquired - now access it */ if (!volmgt_release("floppy0")) { /* handle error case */ ... } ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ |Interface Stability |Obsolete | +-----------------------------+-----------------------------+ SEE ALSO
volmgt_acquire(3VOLMGT), attributes(5), hal(5) SunOS 5.11 8 Mar 2007 volmgt_release(3VOLMGT)
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volmgt_inuse(3VOLMGT) Volume Management Library Functions volmgt_inuse(3VOLMGT) NAME
volmgt_inuse - check whether or not volume management is managing a pathname SYNOPSIS
cc [ flag ... ] file ... -lvolmgt [ library ... ] #include <volmgt.h> int volmgt_inuse(char *pathname); DESCRIPTION
This function is obsolete. The management of removable media by the Volume Management feature, including vold, has been replaced by soft- ware that supports the Hardware Abstraction Layer (HAL). Programmatic support for HAL is through the HAL APIs, which are documented on the HAL web site. See hal(5). The return value of this function is undefined. volmgt_inuse() checks whether volume management is managing the specified pathname. RETURN VALUES
The return from this function is undefined. ERRORS
This routine can fail, returning 0, if a stat(2) of the supplied pathname or an open(2) of /dev/volctl fails, or if any of the following is true: ENXIO Volume management is not running. EINTR An interrupt signal was detected while checking for the supplied pathname for use. EXAMPLES
Example 1 Using volmgt_inuse() To see if volume management is managing the first floppy disk: if (volmgt_inuse("/dev/rdiskette0") != 0) { (void) printf("volmgt is managing diskette 0 "); } else { (void) printf("volmgt is NOT managing diskette 0 "); } ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ |Interface Stability |Obsolete | +-----------------------------+-----------------------------+ SEE ALSO
cc(1B), open(2), stat(2), errno(3C), volmgt_check(3VOLMGT), volmgt_running(3VOLMGT), attributes(5), hal(5) NOTES
This routine requires volume management to be running. Since volmgt_inuse() returns 0 for two different cases (both when a volume is not in use, and when an error occurs), it is up to the user to to check errno to differentiate the two, and to ensure that volume management is running. SunOS 5.11 8 Mar 2007 volmgt_inuse(3VOLMGT)