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   6 .TH MEDIA_GETID 3VOLMGT "Mar 8, 2007"
   7 .SH NAME
   8 media_getid \- return the id of a piece of media
   9 .SH SYNOPSIS
  10 .LP
  11 .nf
  12 \fBcc \fR[flag \&.\|.\|.] \fIfile \fR\&.\|.\|.\fB\(mil\fRvolmgt [library \&.\|.\|.]
  13 
  14 #include <volmgt.h>
  15 
  16 
  17 
  18 \fBulonglong_t\fR \fBmedia_getid\fR(\fBchar *\fR\fIvol_path\fR);
  19 .fi
  20 
  21 .SH DESCRIPTION
  22 .LP
  23 This function is obsolete. The management of removable media by the Volume
  24 Management feature, including \fBvold\fR, has been replaced by software that
  25 supports the Hardware Abstraction Layer (HAL). Programmatic support for HAL is
  26 through the HAL APIs, which are documented on the HAL web site. See
  27 \fBhal\fR(5). The return value of this function is undefined.
  28 .sp
  29 .LP
  30 \fBmedia_getid()\fR returns the \fIid\fR of a piece of media. Volume management
  31 must be running. See \fBvolmgt_running\fR(3VOLMGT).
  32 .SH PARAMETERS
  33 .ne 2
  34 .na
  35 \fB\fIvol_path\fR\fR
  36 .ad
  37 .RS 12n
  38 Path to the block or character special device.
  39 .RE
  40 
  41 .SH RETURN VALUES
  42 .LP
  43 The return from this function is undefined.
  44 .SH EXAMPLES
  45 .LP
  46 \fBExample 1 \fRUsing \fBmedia_getid()\fR
  47 .sp
  48 .LP
  49 The following example first checks if volume management is running, then checks
  50 the volume management name space for \fIpath\fR, and then returns the \fIid\fR
  51 for the piece of media.
  52 
  53 .sp
  54 .in +2
  55 .nf
  56 char *path;
  57 
  58         ...
  59 
  60 if (volmgt_running()) {
  61      if (volmgt_ownspath(path)) {
  62           (void) printf("id of %s is %lld\en",
  63                path, media_getid(path));
  64      }
  65         }
  66 .fi
  67 .in -2
  68 
  69 .sp
  70 .LP
  71 If a program using \fBmedia_getid()\fR does not check whether or not volume
  72 management is running, then any \fBNULL\fR return value will be ambiguous, as
  73 it could mean that either volume management does not have \fIpath\fR in its
  74 name space, or volume management is not running.
  75 
  76 .SH ATTRIBUTES
  77 .LP
  78 See \fBattributes\fR(5)  for descriptions of the following attributes:
  79 .sp
  80 
  81 .sp
  82 .TS
  83 box;
  84 c | c
  85 l | l .
  86 ATTRIBUTE TYPE  ATTRIBUTE VALUE
  87 _
  88 MT-Level        Safe
  89 _
  90 Interface Stability     Obsolete
  91 .TE
  92 
  93 .SH SEE ALSO
  94 .LP
  95 \fBvolmgt_ownspath\fR(3VOLMGT), \fBvolmgt_running\fR(3VOLMGT),
  96 \fBattributes\fR(5), \fBhal\fR(5)