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udevadm: allow multiple arguments to "info"

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This matches udevadm trigger, which allows multiple arguments since
80877656a5.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2018-12-10 14:02:39 +01:00
parent b6854081ff
commit 3c79311a6a
2 changed files with 50 additions and 45 deletions
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8
man/udevadm.xml
View File

@ -76,14 +76,14 @@
<refsect2><title>udevadm info
<arg choice="opt"><replaceable>options</replaceable></arg>
<arg choice="opt"><replaceable>devpath</replaceable>|<replaceable>file</replaceable>|<replaceable>unit</replaceable></arg>
<arg choice="opt" rep="repeat"><replaceable>devpath</replaceable>|<replaceable>file</replaceable>|<replaceable>unit</replaceable></arg>
</title>
<para>Query the udev database for device information.</para>
<para>A positional argument should be used to specify a device. It may be a device name (in which case
it must start with <filename>/dev/</filename>), a sys path (in which case it must start with
<filename>/sys/</filename>), or a systemd device unit name (in which case it must end with
<para>Positional arguments should be used to specify one or more devices. Each one may be a device name
(in which case it must start with <filename>/dev/</filename>), a sys path (in which case it must start
with <filename>/sys/</filename>), or a systemd device unit name (in which case it must end with
<literal>.device</literal>, see
<citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>).
</para>

87
src/udev/udevadm-info.c
View File

@ -335,7 +335,7 @@ static int help(void) {
}
int info_main(int argc, char *argv[], void *userdata) {
_cleanup_(sd_device_unrefp) sd_device *device = NULL;
_cleanup_strv_free_ char **devices = NULL;
_cleanup_free_ char *name = NULL;
int c, r;
@ -361,25 +361,20 @@ int info_main(int argc, char *argv[], void *userdata) {
while ((c = getopt_long(argc, argv, "aced:n:p:q:rxP:RVh", options, NULL)) >= 0)
switch (c) {
case 'n':
if (device) {
log_error("device already specified");
return -EINVAL;
}
case 'p': {
const char *prefix = c == 'n' ? "/dev/" : "/sys/";
char *path;
r = find_device(optarg, "/dev/", &device);
if (r < 0)
return log_error_errno(r, "device node not found: %m");
break;
case 'p':
if (device) {
log_error("device already specified");
return -EINVAL;
}
path = path_join(path_startswith(optarg, prefix) ? NULL : prefix, optarg);
if (!path)
return log_oom();
r = find_device(optarg, "/sys", &device);
r = strv_consume(&devices, path);
if (r < 0)
return log_error_errno(r, "syspath not found: %m");
return log_oom();
break;
}
case 'q':
action = ACTION_QUERY;
if (streq(optarg, "property") || streq(optarg, "env"))
@ -430,35 +425,45 @@ int info_main(int argc, char *argv[], void *userdata) {
assert_not_reached("Unknown option");
}
if (IN_SET(action, ACTION_QUERY, ACTION_ATTRIBUTE_WALK) &&
!device) {
/* A device argument is required. It may be an option or a positional arg. */
if (!argv[optind])
if (action == ACTION_DEVICE_ID_FILE) {
if (argv[optind])
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"A device name or path is required");
r = find_device(argv[optind], NULL, &device);
if (r == -EINVAL)
return log_error_errno(r, "Bad argument \"%s\", expected an absolute path in /dev/ or /sys or a unit name: %m",
argv[optind]);
if (r < 0)
return log_error_errno(r, "Unknown device \"%s\": %m", argv[optind]);
}
switch (action) {
case ACTION_QUERY:
assert(device);
return query_device(query, device);
case ACTION_ATTRIBUTE_WALK:
assert(device);
return print_device_chain(device);
case ACTION_DEVICE_ID_FILE:
"Positional arguments are not allowed with -d/--device-id-of-file.");
assert(name);
return stat_device(name, arg_export, arg_export_prefix);
}
assert_not_reached("Unknown action");
r = strv_extend_strv(&devices, argv + optind, false);
if (r < 0)
return log_error_errno(r, "Failed to build argument list: %m");
if (strv_isempty(devices))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"A device name or path is required");
if (action == ACTION_ATTRIBUTE_WALK && strv_length(devices) > 1)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Only one device may be specified with -a/--attribute-walk");
char **p;
STRV_FOREACH(p, devices) {
_cleanup_(sd_device_unrefp) sd_device *device = NULL;
r = find_device(*p, NULL, &device);
if (r == -EINVAL)
return log_error_errno(r, "Bad argument \"%s\", expected an absolute path in /dev/ or /sys or a unit name: %m", *p);
if (r < 0)
return log_error_errno(r, "Unknown device \"%s\": %m", *p);
if (action == ACTION_QUERY)
r = query_device(query, device);
else if (action == ACTION_ATTRIBUTE_WALK)
r = print_device_chain(device);
else
assert_not_reached("Unknown action");
if (r < 0)
return r;
}
return 0;
}