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Simplify DMRaid::get_udev_dm_name() 

Use if false return early pattern for the udevadm command found check.
Don't bother to check the exit status from running the udevadm command
or whether the output string contains anything before trying to parse it
for the serial number using Utils::regexp_label().  If the output string
is empty because either the udevadm command failed or the device has no
serial number then Utils::regexp_label() will assign the empty string to
serial_number; exactly what is wanted for these failure cases.  This
makes the code simpler and easier to understand and still produces the
desired results in the failure cases.
This commit is contained in:
Mike Fleetwood 2024-08-09 15:28:49 +01:00
parent 78c1986da5
commit ad97634246
1 changed files with 9 additions and 11 deletions
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16
src/DMRaid.cc
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@ -273,26 +273,24 @@ int DMRaid::get_partition_number( const Glib::ustring & partition_name )
return std::atoi( Utils::regexp_label( partition_name, dmraid_name + "p?([0-9]+)" ) .c_str() ) ;
}
Glib::ustring DMRaid::get_udev_dm_name( const Glib::ustring & dev_path )
{
Glib::ustring dm_name;
if (! udevadm_found)
return dm_name;
//Retrieve DM_NAME of device using udev information
Glib::ustring output;
Glib::ustring error;
Glib::ustring dm_name;
if (udevadm_found)
Utils::execute_command("udevadm info --query=all --name=" + Glib::shell_quote(dev_path),
output, error, true);
if ( ! output .empty() )
{
Glib::ustring regexp = "^E: DM_NAME=([^\n]*)$" ;
dm_name = Utils::regexp_label( output, regexp ) ;
}
dm_name = Utils::regexp_label(output, "^E: DM_NAME=([^\n]*)$");
return dm_name ;
}
Glib::ustring DMRaid::make_path_dmraid_compatible( Glib::ustring partition_path )
{
//The purpose of this method is to ensure that the partition name matches