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ENV{TEST}=="1" compares and ENV{TEST}="1" sets the environment

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This can be uses to export stuff to the event environment or
to carry a state from one rule to another, like enabling/disabling
later rules conditionally.

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
This commit is contained in:
Kay Sievers 2005-08-16 04:25:20 +02:00
parent beb9f9ccb8
commit 5618b5611b
2 changed files with 70 additions and 36 deletions
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25
test/udev-test.pl
View File

@ -1291,6 +1291,31 @@ BUS=="scsi", KERNEL=="sda1", ENV{ENV_KEY_TEST}=="go", NAME="wrong"
BUS=="scsi", KERNEL=="sda1", ENV{ENV_KEY_TEST}=="yes", ENV{ACTION}=="add", ENV{DEVPATH}=="/block/sda/sdax1", NAME="no"
BUS=="scsi", KERNEL=="sda1", ENV{ENV_KEY_TEST}=="test", ENV{ACTION}=="add", ENV{DEVPATH}=="/block/sda/sda1", NAME="true"
BUS=="scsi", KERNEL=="sda1", ENV{ENV_KEY_TEST}=="bad", NAME="bad"
EOF
},
{
desc => "ENV{} test (assign)",
subsys => "block",
devpath => "/block/sda/sda1",
exp_name => "true",
rules => <<EOF
BUS=="scsi", KERNEL=="sda1", ENV{ASSIGN}="true"
BUS=="scsi", KERNEL=="sda1", ENV{ASSIGN}=="yes", NAME="no"
BUS=="scsi", KERNEL=="sda1", ENV{ASSIGN}=="true", NAME="true"
BUS=="scsi", KERNEL=="sda1", NAME="bad"
EOF
},
{
desc => "ENV{} test (assign2)",
subsys => "block",
devpath => "/block/sda/sda1",
exp_name => "part",
rules => <<EOF
SUBSYSTEM=="block", KERNEL="*[0-9]", ENV{PARTITION}="true", ENV{MAINDEVICE}="false"
SUBSYSTEM=="block", KERNEL="*[!0-9]", ENV{PARTITION}="false", ENV{MAINDEVICE}="true"
ENV{MAINDEVICE}=="true", NAME="disk"
ENV{PARTITION}=="true", NAME="part"
NAME="bad"
EOF
},
{

81
udev_rules.c
View File

@ -667,6 +667,7 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule,
struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
{
struct sysfs_device *parent_device = sysfs_device;
int i;
if (match_key("ACTION", rule, &rule->action, udev->action))
goto exit;
@ -691,23 +692,21 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule,
goto exit;
}
if (rule->env.count) {
int i;
for (i = 0; i < rule->env.count; i++) {
struct key_pair *pair = &rule->env.keys[i];
dbg("check %i ENV keys", rule->env.count);
for (i = 0; i < rule->env.count; i++) {
struct key_pair *pair = &rule->env.keys[i];
/* we only check for matches, assignments will be handled later */
if (pair->key.operation != KEY_OP_ASSIGN) {
const char *key_name = key_pair_name(rule, pair);
const char *value = getenv(key_name);
if (!value) {
dbg("ENV{'%s'} is not set", key_name);
dbg("ENV{'%s'} is not set, treat as empty", key_name);
value = "";
}
if (match_key("ENV", rule, &pair->key, value))
goto exit;
}
dbg("all %i ENV keys matched", rule->env.count);
}
if (rule->wait_for_sysfs.operation != KEY_OP_UNSET) {
@ -760,8 +759,6 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule,
/* check for matching sysfs pairs */
if (rule->sysfs.count) {
int i;
dbg("check %i SYSFS keys", rule->sysfs.count);
for (i = 0; i < rule->sysfs.count; i++) {
struct key_pair *pair = &rule->sysfs.keys[i];
@ -799,32 +796,6 @@ try_parent:
dbg("look at sysfs_device->bus_id='%s'", parent_device->bus_id);
}
/* import variables from file into environment */
if (rule->import.operation != KEY_OP_UNSET) {
char import[PATH_SIZE];
int rc = -1;
strlcpy(import, key_val(rule, &rule->import), sizeof(import));
apply_format(udev, import, sizeof(import), class_dev, sysfs_device);
dbg("check for IMPORT import='%s'", import);
if (rule->import_type == IMPORT_PROGRAM) {
rc = import_program_into_env(udev, import);
} else if (rule->import_type == IMPORT_FILE) {
dbg("import file import='%s'", import);
rc = import_file_into_env(udev, import);
} else if (rule->import_type == IMPORT_PARENT && class_dev) {
dbg("import parent import='%s'", import);
rc = import_parent_into_env(udev, class_dev, import);
}
if (rc) {
dbg("IMPORT failed");
if (rule->import.operation != KEY_OP_NOMATCH)
goto exit;
} else
dbg("IMPORT '%s' imported", key_val(rule, &rule->import));
dbg("IMPORT key is true");
}
/* execute external program */
if (rule->program.operation != KEY_OP_UNSET) {
char program[PATH_SIZE];
@ -854,7 +825,45 @@ try_parent:
if (match_key("RESULT", rule, &rule->result, udev->program_result))
goto exit;
/* rule matches */
/* import variables returned from program or or file into environment */
if (rule->import.operation != KEY_OP_UNSET) {
char import[PATH_SIZE];
int rc = -1;
strlcpy(import, key_val(rule, &rule->import), sizeof(import));
apply_format(udev, import, sizeof(import), class_dev, sysfs_device);
dbg("check for IMPORT import='%s'", import);
if (rule->import_type == IMPORT_PROGRAM) {
rc = import_program_into_env(udev, import);
} else if (rule->import_type == IMPORT_FILE) {
dbg("import file import='%s'", import);
rc = import_file_into_env(udev, import);
} else if (rule->import_type == IMPORT_PARENT && class_dev) {
dbg("import parent import='%s'", import);
rc = import_parent_into_env(udev, class_dev, import);
}
if (rc) {
dbg("IMPORT failed");
if (rule->import.operation != KEY_OP_NOMATCH)
goto exit;
} else
dbg("IMPORT '%s' imported", key_val(rule, &rule->import));
dbg("IMPORT key is true");
}
/* rule matches, if we have ENV assignments export it */
for (i = 0; i < rule->env.count; i++) {
struct key_pair *pair = &rule->env.keys[i];
if (pair->key.operation == KEY_OP_ASSIGN) {
const char *key_name = key_pair_name(rule, pair);
const char *value = key_val(rule, &pair->key);
setenv(key_name, value, 1);
dbg("export ENV '%s=%s'", key_name, value);
}
}
return 0;
exit: