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udevadm: add --wait-for-initialization option to "udevadm info"

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This commit is contained in:
Yu Watanabe 2019-06-02 01:02:09 +09:00
parent 1b47436e0e
commit ae760f4b16
3 changed files with 42 additions and 14 deletions
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8
man/udevadm.xml
View file

@ -175,6 +175,14 @@
<para>Cleanup the udev database.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-w<optional>SECONDS</optional></option></term>
<term><option>--wait-for-initialization<optional>=SECONDS</optional></option></term>
<listitem>
<para>Wait for device to be initialized. If argument <replaceable>SECONDS</replaceable>
is not specified, the default is to wait forever.</para>
</listitem>
</varlistentry>
<xi:include href="standard-options.xml" xpointer="help" />
</variablelist>

3
shell-completion/bash/udevadm
View file

@ -48,7 +48,8 @@ _udevadm() {
local -A OPTS=(
[COMMON]='-h --help -V --version'
[DEBUG]='-d --debug'
[INFO_STANDALONE]='-r --root -a --attribute-walk -x --export -e --export-db -c --cleanup-db'
[INFO_STANDALONE]='-r --root -a --attribute-walk -x --export -e --export-db -c --cleanup-db
-w --wait-for-initialization'
[INFO_ARG]='-q --query -p --path -n --name -P --export-prefix -d --device-id-of-file'
[TRIGGER_STANDALONE]='-v --verbose -n --dry-run -w --settle --wait-daemon'
[TRIGGER_ARG]='-t --type -c --action -s --subsystem-match -S --subsystem-nomatch

45
src/udev/udevadm-info.c
View file

@ -20,6 +20,7 @@
#include "fd-util.h"
#include "string-table.h"
#include "string-util.h"
#include "udev-util.h"
#include "udevadm-util.h"
#include "udevadm.h"
@ -40,6 +41,7 @@ typedef enum QueryType {
static bool arg_root = false;
static bool arg_export = false;
static const char *arg_export_prefix = NULL;
static usec_t arg_wait_for_initialization_timeout = 0;
static bool skip_attribute(const char *name) {
static const char* const skip[] = {
@ -329,6 +331,8 @@ static int help(void) {
" -P --export-prefix Export the key name with a prefix\n"
" -e --export-db Export the content of the udev database\n"
" -c --cleanup-db Clean up the udev database\n"
" -w --wait-for-initialization[=SECONDS]\n"
" Wait for device to be initialized\n"
, program_invocation_short_name);
return 0;
@ -340,25 +344,26 @@ int info_main(int argc, char *argv[], void *userdata) {
int c, r;
static const struct option options[] = {
{ "name", required_argument, NULL, 'n' },
{ "path", required_argument, NULL, 'p' },
{ "query", required_argument, NULL, 'q' },
{ "attribute-walk", no_argument, NULL, 'a' },
{ "cleanup-db", no_argument, NULL, 'c' },
{ "export-db", no_argument, NULL, 'e' },
{ "root", no_argument, NULL, 'r' },
{ "device-id-of-file", required_argument, NULL, 'd' },
{ "export", no_argument, NULL, 'x' },
{ "export-prefix", required_argument, NULL, 'P' },
{ "version", no_argument, NULL, 'V' },
{ "help", no_argument, NULL, 'h' },
{ "name", required_argument, NULL, 'n' },
{ "path", required_argument, NULL, 'p' },
{ "query", required_argument, NULL, 'q' },
{ "attribute-walk", no_argument, NULL, 'a' },
{ "cleanup-db", no_argument, NULL, 'c' },
{ "export-db", no_argument, NULL, 'e' },
{ "root", no_argument, NULL, 'r' },
{ "device-id-of-file", required_argument, NULL, 'd' },
{ "export", no_argument, NULL, 'x' },
{ "export-prefix", required_argument, NULL, 'P' },
{ "wait-for-initialization", optional_argument, NULL, 'w' },
{ "version", no_argument, NULL, 'V' },
{ "help", no_argument, NULL, 'h' },
{}
};
ActionType action = ACTION_QUERY;
QueryType query = QUERY_ALL;
while ((c = getopt_long(argc, argv, "aced:n:p:q:rxP:Vh", options, NULL)) >= 0)
while ((c = getopt_long(argc, argv, "aced:n:p:q:rxP:w::Vh", options, NULL)) >= 0)
switch (c) {
case 'n':
case 'p': {
@ -414,6 +419,14 @@ int info_main(int argc, char *argv[], void *userdata) {
arg_export = true;
arg_export_prefix = optarg;
break;
case 'w':
if (optarg) {
r = parse_sec(optarg, &arg_wait_for_initialization_timeout);
if (r < 0)
return log_error_errno(r, "Failed to parse timeout value: %m");
} else
arg_wait_for_initialization_timeout = USEC_INFINITY;
break;
case 'V':
return print_version();
case 'h':
@ -453,6 +466,12 @@ int info_main(int argc, char *argv[], void *userdata) {
if (r < 0)
return log_error_errno(r, "Unknown device \"%s\": %m", *p);
if (arg_wait_for_initialization_timeout > 0) {
r = device_wait_for_initialization(device, NULL, arg_wait_for_initialization_timeout, NULL);
if (r < 0)
return r;
}
if (action == ACTION_QUERY)
r = query_device(query, device);
else if (action == ACTION_ATTRIBUTE_WALK)