1media_getid(3VOLMGT) Volume Management Library Functions media_getid(3VOLMGT)
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6 media_getid - return the id of a piece of media
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9 cc [flag ...] file ...−lvolgmt [library ...]
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11 #include <volmgt.h>
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15 ulonglong_t media_getid(char *vol_path);
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19 This function is obsolete. The management of removable media by the
20 Volume Management feature, including vold, has been replaced by soft‐
21 ware that supports the Hardware Abstraction Layer (HAL). Programmatic
22 support for HAL is through the HAL APIs, which are documented on the
23 HAL web site. See hal(5). The return value of this function is unde‐
24 fined.
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27 media_getid() returns the id of a piece of media. Volume management
28 must be running. See volmgt_running(3VOLMGT).
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31 vol_path Path to the block or character special device.
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35 The return from this function is undefined.
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38 Example 1 Using media_getid()
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41 The following example first checks if volume management is running,
42 then checks the volume management name space for path, and then returns
43 the id for the piece of media.
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46 char *path;
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48 ...
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50 if (volmgt_running()) {
51 if (volmgt_ownspath(path)) {
52 (void) printf("id of %s is %lld\n",
53 path, media_getid(path));
54 }
55 }
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59 If a program using media_getid() does not check whether or not volume
60 management is running, then any NULL return value will be ambiguous, as
61 it could mean that either volume management does not have path in its
62 name space, or volume management is not running.
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66 See attributes(5) for descriptions of the following attributes:
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71 ┌─────────────────────────────┬─────────────────────────────┐
72 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
73 ├─────────────────────────────┼─────────────────────────────┤
74 │MT-Level │Safe │
75 ├─────────────────────────────┼─────────────────────────────┤
76 │Interface Stability │Obsolete │
77 └─────────────────────────────┴─────────────────────────────┘
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80 volmgt_ownspath(3VOLMGT),volmgt_running(3VOLMGT),attributes(5), hal(5)
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84SunOS 5.11 8 Mar 2007 media_getid(3VOLMGT)