X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=namedev.c;h=ac05fd88e4d4e4cc31ddd2dbc44a40164cffab7c;hp=0271ba55a2ad4091f382c506c87a559aa456dd57;hb=c2405f502cae4a634a25674306cffefb85df9ebb;hpb=469c7cff3b1432aa7a8786c08ee9a64caec2ba27;ds=sidebyside

diff --git a/namedev.c b/namedev.c
index 0271ba55a..ac05fd88e 100644
--- a/namedev.c
+++ b/namedev.c
@@ -21,6 +21,9 @@
  *
  */
 
+/* define this to enable parsing debugging */
+/* #define DEBUG_PARSER */
+
 #include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
@@ -29,54 +32,19 @@
 #include <ctype.h>
 #include <unistd.h>
 #include <errno.h>
+#include <sys/wait.h>
 
 #include "list.h"
 #include "udev.h"
 #include "udev_version.h"
 #include "namedev.h"
+#include "libsysfs/libsysfs.h"
 
 #define TYPE_LABEL	"LABEL"
 #define TYPE_NUMBER	"NUMBER"
 #define TYPE_TOPOLOGY	"TOPOLOGY"
 #define TYPE_REPLACE	"REPLACE"
-
-enum config_type {
-	KERNEL_NAME	= 0,	/* must be 0 to let memset() default to this value */
-	LABEL		= 1,
-	NUMBER		= 2,
-	TOPOLOGY	= 3,
-	REPLACE		= 4,
-};
-
-#define BUS_SIZE	30
-#define FILE_SIZE	50
-#define VALUE_SIZE	100
-#define ID_SIZE		50
-#define PLACE_SIZE	50
-#define NAME_SIZE	100
-#define OWNER_SIZE	30
-#define GROUP_SIZE	30
-
-
-struct config_device {
-	struct list_head node;
-
-	enum config_type type;
-
-	char bus[BUS_SIZE];
-	char sysfs_file[FILE_SIZE];
-	char sysfs_value[VALUE_SIZE];
-	char id[ID_SIZE];
-	char place[PLACE_SIZE];
-	char kernel_name[NAME_SIZE];
-	
-	/* what to set the device to */
-	int mode;
-	char name[NAME_SIZE];
-	char owner[OWNER_SIZE];
-	char group[GROUP_SIZE];
-};
-
+#define TYPE_CALLOUT	"CALLOUT"
 
 static LIST_HEAD(config_device_list);
 
@@ -84,37 +52,43 @@ static void dump_dev(struct config_device *dev)
 {
 	switch (dev->type) {
 	case KERNEL_NAME:
-		dbg("KERNEL name ='%s'"
-			" owner = '%s', group = '%s', mode = '%d'", 
-			dev->name, 
-			dev->owner, dev->group, dev->mode);
+		dbg_parse("KERNEL name ='%s'"
+			" owner = '%s', group = '%s', mode = '%#o'",
+			dev->attr.name, 
+			dev->attr.owner, dev->attr.group, dev->attr.mode);
 		break;
 	case LABEL:
-		dbg("LABEL name = '%s', bus = '%s', sysfs_file = '%s', sysfs_value = '%s'"
-			" owner = '%s', group = '%s', mode = '%d'",
-			dev->name, dev->bus, dev->sysfs_file, dev->sysfs_value,
-			dev->owner, dev->group, dev->mode);
+		dbg_parse("LABEL name = '%s', bus = '%s', sysfs_file = '%s', sysfs_value = '%s'"
+			" owner = '%s', group = '%s', mode = '%#o'",
+			dev->attr.name, dev->bus, dev->sysfs_file, dev->sysfs_value,
+			dev->attr.owner, dev->attr.group, dev->attr.mode);
 		break;
 	case NUMBER:
-		dbg("NUMBER name = '%s', bus = '%s', id = '%s'"
-			" owner = '%s', group = '%s', mode = '%d'",
-			dev->name, dev->bus, dev->id,
-			dev->owner, dev->group, dev->mode);
+		dbg_parse("NUMBER name = '%s', bus = '%s', id = '%s'"
+			" owner = '%s', group = '%s', mode = '%#o'",
+			dev->attr.name, dev->bus, dev->id,
+			dev->attr.owner, dev->attr.group, dev->attr.mode);
 		break;
 	case TOPOLOGY:
-		dbg("TOPOLOGY name = '%s', bus = '%s', place = '%s'"
-			" owner = '%s', group = '%s', mode = '%d'",
-			dev->name, dev->bus, dev->place,
-			dev->owner, dev->group, dev->mode);
+		dbg_parse("TOPOLOGY name = '%s', bus = '%s', place = '%s'"
+			" owner = '%s', group = '%s', mode = '%#o'",
+			dev->attr.name, dev->bus, dev->place,
+			dev->attr.owner, dev->attr.group, dev->attr.mode);
 		break;
 	case REPLACE:
-		dbg("REPLACE name = %s, kernel_name = %s"
-			" owner = '%s', group = '%s', mode = '%d'",
-			dev->name, dev->kernel_name,
-			dev->owner, dev->group, dev->mode);
+		dbg_parse("REPLACE name = %s, kernel_name = %s"
+			" owner = '%s', group = '%s', mode = '%#o'",
+			dev->attr.name, dev->kernel_name,
+			dev->attr.owner, dev->attr.group, dev->attr.mode);
+		break;
+	case CALLOUT:
+		dbg_parse("CALLOUT name = '%s', program ='%s', bus = '%s', id = '%s'"
+			" owner = '%s', group = '%s', mode = '%#o'",
+			dev->attr.name, dev->exec_program, dev->bus, dev->id,
+			dev->attr.owner, dev->attr.group, dev->attr.mode);
 		break;
 	default:
-		dbg("Unknown type of device!");
+		dbg_parse("Unknown type of device!");
 	}
 }
 
@@ -135,18 +109,18 @@ static int add_dev(struct config_device *new_dev)
 	 * this one... */
 	list_for_each(tmp, &config_device_list) {
 		struct config_device *dev = list_entry(tmp, struct config_device, node);
-		if (strcmp(dev->name, new_dev->name) == 0) {
+		if (strcmp(dev->attr.name, new_dev->attr.name) == 0) {
 			/* the same, copy the new info into this structure */
 			copy_var(dev, new_dev, type);
-			copy_var(dev, new_dev, mode);
+			copy_var(dev, new_dev, attr.mode);
 			copy_string(dev, new_dev, bus);
 			copy_string(dev, new_dev, sysfs_file);
 			copy_string(dev, new_dev, sysfs_value);
 			copy_string(dev, new_dev, id);
 			copy_string(dev, new_dev, place);
 			copy_string(dev, new_dev, kernel_name);
-			copy_string(dev, new_dev, owner);
-			copy_string(dev, new_dev, group);
+			copy_string(dev, new_dev, attr.owner);
+			copy_string(dev, new_dev, attr.group);
 			return 0;
 		}
 	}
@@ -232,7 +206,7 @@ static int namedev_init_config(void)
 	int retval = 0;
 	struct config_device dev;
 
-	strcpy(filename, NAMEDEV_CONFIG_ROOT NAMEDEV_CONFIG_FILE);
+	strcpy(filename, UDEV_CONFIG_DIR NAMEDEV_CONFIG_FILE);
 	dbg("opening %s to read as permissions config", filename);
 	fd = fopen(filename, "r");
 	if (fd == NULL) {
@@ -247,7 +221,7 @@ static int namedev_init_config(void)
 		if (temp == NULL)
 			break;
 
-		dbg("read %s", temp);
+		dbg_parse("read %s", temp);
 
 		/* eat the whitespace at the beginning of the line */
 		while (isspace(*temp))
@@ -288,9 +262,12 @@ static int namedev_init_config(void)
 			retval = get_value("NAME", &temp, &temp3);
 			if (retval)
 				continue;
-			strcpy(dev.name, temp3);
+			strcpy(dev.attr.name, temp3);
 
-			dbg("LABEL name = '%s', bus = '%s', sysfs_file = '%s', sysfs_value = '%s'", dev.name, dev.bus, dev.sysfs_file, dev.sysfs_value);
+			dbg_parse("LABEL name = '%s', bus = '%s', "
+				"sysfs_file = '%s', sysfs_value = '%s'", 
+				dev.attr.name, dev.bus, dev.sysfs_file, 
+				dev.sysfs_value);
 		}
 
 		if (strcasecmp(temp2, TYPE_NUMBER) == 0) {
@@ -315,9 +292,10 @@ static int namedev_init_config(void)
 			retval = get_value("NAME", &temp, &temp3);
 			if (retval)
 				continue;
-			strcpy(dev.name, temp3);
+			strcpy(dev.attr.name, temp3);
 
-			dbg("NUMBER name = '%s', bus = '%s', id = '%s'", dev.name, dev.bus, dev.id);
+			dbg_parse("NUMBER name = '%s', bus = '%s', id = '%s'",
+					dev.attr.name, dev.bus, dev.id);
 		}
 
 		if (strcasecmp(temp2, TYPE_TOPOLOGY) == 0) {
@@ -342,9 +320,10 @@ static int namedev_init_config(void)
 			retval = get_value("NAME", &temp, &temp3);
 			if (retval)
 				continue;
-			strcpy(dev.name, temp3);
+			strcpy(dev.attr.name, temp3);
 
-			dbg("TOPOLOGY name = '%s', bus = '%s', place = '%s'", dev.name, dev.bus, dev.place);
+			dbg_parse("TOPOLOGY name = '%s', bus = '%s', place = '%s'",
+					dev.attr.name, dev.bus, dev.place);
 		}
 
 		if (strcasecmp(temp2, TYPE_REPLACE) == 0) {
@@ -362,8 +341,42 @@ static int namedev_init_config(void)
 			retval = get_value("NAME", &temp, &temp3);
 			if (retval)
 				continue;
-			strcpy(dev.name, temp3);
-			dbg("REPLACE name = %s, kernel_name = %s", dev.name, dev.kernel_name);
+			strcpy(dev.attr.name, temp3);
+			dbg_parse("REPLACE name = %s, kernel_name = %s",
+					dev.attr.name, dev.kernel_name);
+		}
+		if (strcasecmp(temp2, TYPE_CALLOUT) == 0) {
+			/* number type */
+			dev.type = CALLOUT;
+
+			/* PROGRAM="executable" */
+			retval = get_value("PROGRAM", &temp, &temp3);
+			if (retval)
+				continue;
+			strcpy(dev.exec_program, temp3);
+
+			/* BUS="bus" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("BUS", &temp, &temp3);
+			if (retval)
+				continue;
+			strcpy(dev.bus, temp3);
+
+			/* ID="id" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("ID", &temp, &temp3);
+			if (retval)
+				continue;
+			strcpy(dev.id, temp3);
+
+			/* NAME="new_name" */
+			temp2 = strsep(&temp, ",");
+			retval = get_value("NAME", &temp, &temp3);
+			if (retval)
+				continue;
+			strcpy(dev.attr.name, temp3);
+			dbg_parse("CALLOUT name = %s, program = %s",
+					dev.attr.name, dev.exec_program);
 		}
 
 		retval = add_dev(&dev);
@@ -389,7 +402,7 @@ static int namedev_init_permissions(void)
 	int retval = 0;
 	struct config_device dev;
 
-	strcpy(filename, NAMEDEV_CONFIG_ROOT NAMEDEV_CONFIG_PERMISSION_FILE);
+	strcpy(filename, UDEV_CONFIG_DIR NAMEDEV_CONFIG_PERMISSION_FILE);
 	dbg("opening %s to read as permissions config", filename);
 	fd = fopen(filename, "r");
 	if (fd == NULL) {
@@ -404,7 +417,7 @@ static int namedev_init_permissions(void)
 		if (temp == NULL)
 			break;
 
-		dbg("read %s", temp);
+		dbg_parse("read %s", temp);
 
 		/* eat the whitespace at the beginning of the line */
 		while (isspace(*temp))
@@ -422,17 +435,19 @@ static int namedev_init_permissions(void)
 
 		/* parse the line */
 		temp2 = strsep(&temp, ":");
-		strncpy(dev.name, temp2, sizeof(dev.name));
+		strncpy(dev.attr.name, temp2, sizeof(dev.attr.name));
 
 		temp2 = strsep(&temp, ":");
-		strncpy(dev.owner, temp2, sizeof(dev.owner));
+		strncpy(dev.attr.owner, temp2, sizeof(dev.attr.owner));
 
 		temp2 = strsep(&temp, ":");
-		strncpy(dev.group, temp2, sizeof(dev.owner));
+		strncpy(dev.attr.group, temp2, sizeof(dev.attr.owner));
 
-		dev.mode = strtol(temp, NULL, 8);
+		dev.attr.mode = strtol(temp, NULL, 8);
 
-		dbg("name = %s, owner = %s, group = %s, mode = %x", dev.name, dev.owner, dev.group, dev.mode);
+		dbg_parse("name = %s, owner = %s, group = %s, mode = %#o",
+				dev.attr.name, dev.attr.owner, dev.attr.group,
+				dev.attr.mode);
 		retval = add_dev(&dev);
 		if (retval) {
 			dbg("add_dev returned with error %d", retval);
@@ -445,12 +460,324 @@ exit:
 	return retval;
 }	
 
+static mode_t get_default_mode(struct sysfs_class_device *class_dev)
+{
+	/* just default everyone to rw for the world! */
+	return 0666;
+}
 
 
-int namedev_init(void)
+static int exec_callout(struct config_device *dev, char *value, int len)
 {
 	int retval;
+	int res;
+	int status;
+	int fds[2];
+	pid_t pid;
+	int value_set = 0;
+	char buffer[256];
+
+	dbg("callout to %s\n", dev->exec_program);
+	retval = pipe(fds);
+	if (retval != 0) {
+		dbg("pipe failed");
+		return -1;
+	}
+	pid = fork();
+	if (pid == -1) {
+		dbg("fork failed");
+		return -1;
+	}
 
+	if (pid == 0) {
+		/*
+		 * child 
+		 */
+		close(STDOUT_FILENO);
+		dup(fds[1]);	/* dup write side of pipe to STDOUT */
+		retval = execve(dev->exec_program, main_argv, main_envp);
+		if (retval != 0) {
+			dbg("child execve failed");
+			exit(1);
+		}
+		return -1; /* avoid compiler warning */
+	} else {
+		/*
+		 * Parent reads from fds[0].
+		 */
+		close(fds[1]);
+		retval = 0;
+		while (1) {
+			res = read(fds[0], buffer, sizeof(buffer) - 1);
+			if (res <= 0)
+				break;
+			buffer[res] = '\0';
+			if (res > len) {
+				dbg("callout len %d too short\n", len);
+				retval = -1;
+			}
+			if (value_set) {
+				dbg("callout value already set");
+				retval = -1;
+			} else {
+				value_set = 1;
+				strncpy(value, buffer, len);
+			}
+		}
+		close(fds[0]);
+		res = wait(&status);
+		if (res < 0) {
+			dbg("wait failed result %d", res);
+			retval = -1;
+		}
+
+		if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
+			dbg("callout program status 0x%x", status);
+			retval = -1;
+		}
+	}
+	return retval;
+}
+
+static int get_attr(struct sysfs_class_device *class_dev, struct device_attr *attr)
+{
+	struct list_head *tmp;
+	int retval = 0;
+	int found;
+
+	attr->mode = 0;
+	if (class_dev->sysdevice) {
+		dbg_parse("class_dev->sysdevice->directory->path = '%s'", class_dev->sysdevice->directory->path);
+		dbg_parse("class_dev->sysdevice->bus_id = '%s'", class_dev->sysdevice->bus_id);
+	} else {
+		dbg_parse("class_dev->name = '%s'", class_dev->name);
+	}
+	list_for_each(tmp, &config_device_list) {
+		struct config_device *dev = list_entry(tmp, struct config_device, node);
+		switch (dev->type) {
+		case LABEL:
+			{
+			char *temp;
+
+			dbg_parse("LABEL: match file '%s' with value '%s'",
+					dev->sysfs_file, dev->sysfs_value);
+			/* try to find the attribute in the class device directory */
+			temp = sysfs_get_value_from_attributes(class_dev->directory->attributes, dev->sysfs_file);
+			if (temp)
+				goto label_found;
+
+			/* look in the class device device directory if present */
+			if (class_dev->sysdevice) {
+				temp = sysfs_get_value_from_attributes(class_dev->sysdevice->directory->attributes, dev->sysfs_file);
+				if (temp)
+					goto label_found;
+			}
+
+			/* bah, let's go backwards up a level to see if the device is there,
+			 * as block partitions don't point to the physical device.  Need to fix that
+			 * up in the kernel...
+			 */
+			if (strstr(class_dev->directory->path, "block")) {
+				dbg_parse("looking at block device...");
+				if (isdigit(class_dev->directory->path[strlen(class_dev->directory->path)-1])) {
+					char path[SYSFS_PATH_MAX];
+					struct sysfs_class_device *class_dev_parent;
+
+					dbg_parse("really is a partition...");
+					strcpy(path, class_dev->directory->path);
+					temp = strrchr(path, '/');
+					*temp = 0x00;
+					dbg_parse("looking for a class device at '%s'", path);
+					class_dev_parent = sysfs_open_class_device(path);
+					if (class_dev_parent == NULL) {
+						dbg("sysfs_open_class_device at '%s' failed", path);
+						continue;
+					}
+					dbg_parse("class_dev_parent->name = %s", class_dev_parent->name);
+
+					/* try to find the attribute in the class device directory */
+					temp = sysfs_get_value_from_attributes(class_dev_parent->directory->attributes, dev->sysfs_file);
+					if (temp) {
+						//sysfs_close_class_device(class_dev_parent);
+						goto label_found;
+					}
+
+					/* look in the class device device directory if present */
+					if (class_dev_parent->sysdevice) {
+						temp = sysfs_get_value_from_attributes(class_dev_parent->sysdevice->directory->attributes, dev->sysfs_file);
+						if (temp) {
+							// sysfs_close_class_device(class_dev_parent);
+							goto label_found;
+						}
+					}
+					
+				}
+			}
+			continue;
+
+label_found:
+			temp[strlen(temp)-1] = 0x00;
+			dbg_parse("file '%s' found with value '%s' compare with '%s'", dev->sysfs_file, temp, dev->sysfs_value);
+			if (strcmp(dev->sysfs_value, temp) != 0)
+				continue;
+
+			strcpy(attr->name, dev->attr.name);
+			if (isdigit(class_dev->directory->path[strlen(class_dev->directory->path)-1])) {
+				temp[0] = class_dev->directory->path[strlen(class_dev->directory->path)-1];
+				temp[1] = 0x00;
+				strcat(attr->name, temp);
+			}
+			if (dev->attr.mode != 0) {
+				attr->mode = dev->attr.mode;
+				strcpy(attr->owner, dev->attr.owner);
+				strcpy(attr->group, dev->attr.group);
+			}
+			dbg_parse("file '%s' with value '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
+				dev->sysfs_file, dev->sysfs_value, attr->name, 
+				dev->attr.owner, dev->attr.group, dev->attr.mode);
+			goto done;
+			break;
+			}
+		case NUMBER:
+			{
+			char path[SYSFS_PATH_MAX];
+			char *temp;
+
+			found = 0;
+			if (!class_dev->sysdevice)
+				continue;
+			strcpy(path, class_dev->sysdevice->directory->path);
+			temp = strrchr(path, '/');
+			dbg_parse("NUMBER path = '%s'", path);
+			dbg_parse("NUMBER temp = '%s' id = '%s'", temp, dev->id);
+			if (strstr(temp, dev->id) != NULL) {
+				found = 1;
+			} else {
+				*temp = 0x00;
+				temp = strrchr(path, '/');
+				dbg_parse("NUMBERY temp = '%s' id = '%s'", temp, dev->id);
+				if (strstr(temp, dev->id) != NULL)
+					found = 1;
+			}
+			if (!found)
+				continue;
+
+			strcpy(attr->name, dev->attr.name);
+			if (dev->attr.mode != 0) {
+				attr->mode = dev->attr.mode;
+				strcpy(attr->owner, dev->attr.owner);
+				strcpy(attr->group, dev->attr.group);
+			}
+			dbg_parse("device id '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
+				dev->id, attr->name, 
+				dev->attr.owner, dev->attr.group, dev->attr.mode);
+			goto done;
+			break;
+			}
+		case TOPOLOGY:
+			{
+			char path[SYSFS_PATH_MAX];
+			char *temp;
+
+			if (!class_dev->sysdevice)
+				continue;
+			found = 0;	
+			strcpy(path, class_dev->sysdevice->directory->path);
+			temp = strrchr(path, '/');
+			dbg_parse("TOPOLOGY path = '%s'", path);
+			dbg_parse("TOPOLOGY temp = '%s' place = '%s'", temp, dev->place);
+			if (strstr(temp, dev->place) != NULL) {
+				found = 1;
+			} else {
+				*temp = 0x00;
+				temp = strrchr(path, '/');
+				dbg_parse("TOPOLOGY temp = '%s' place = '%s'", temp, dev->place);
+				if (strstr(temp, dev->place) != NULL)
+					found = 1;
+			}
+			if (!found)
+				continue;
+
+			strcpy(attr->name, dev->attr.name);
+			if (dev->attr.mode != 0) {
+				attr->mode = dev->attr.mode;
+				strcpy(attr->owner, dev->attr.owner);
+				strcpy(attr->group, dev->attr.group);
+			}
+			dbg_parse("device at '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
+				dev->place, attr->name, 
+				dev->attr.owner, dev->attr.group, dev->attr.mode);
+			goto done;
+			break;
+			}
+		case CALLOUT:
+			{
+			char value[ID_SIZE];
+
+			if (exec_callout(dev, value, sizeof(value)))
+				continue;
+			if (strncmp(value, dev->id, sizeof(value)) != 0)
+				continue;
+			strcpy(attr->name, dev->attr.name);
+			if (dev->attr.mode != 0) {
+				attr->mode = dev->attr.mode;
+				strcpy(attr->owner, dev->attr.owner);
+				strcpy(attr->group, dev->attr.group);
+			}
+			dbg_parse("device callout '%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
+				dev->id, attr->name, 
+				dev->attr.owner, dev->attr.group, dev->attr.mode);
+			goto done;
+			break;
+			}
+		case REPLACE:
+			if (strcmp(dev->kernel_name, class_dev->name) != 0)
+				continue;
+			strcpy(attr->name, dev->attr.name);
+			if (dev->attr.mode != 0) {
+				attr->mode = dev->attr.mode;
+				strcpy(attr->owner, dev->attr.owner);
+				strcpy(attr->group, dev->attr.group);
+			}
+			dbg_parse("'%s' becomes '%s' - owner = %s, group = %s, mode = %#o",
+				dev->kernel_name, attr->name, 
+				dev->attr.owner, dev->attr.group, dev->attr.mode);
+			goto done;
+			break;
+		case KERNEL_NAME:
+			break;
+		default:
+			dbg_parse("Unknown type of device '%d'", dev->type);
+			break;
+		}	
+	}
+	strcpy(attr->name, class_dev->name);
+
+done:
+	/* mode was never set above */
+	if (!attr->mode) {
+		attr->mode = get_default_mode(class_dev);
+		attr->owner[0] = 0x00;
+		attr->group[0] = 0x00;
+	}
+	return retval;
+}
+
+int namedev_name_device(struct sysfs_class_device *class_dev, struct device_attr *attr)
+{
+	int retval;
+
+	retval = get_attr(class_dev, attr);
+	if (retval)
+		dbg("get_attr failed");
+
+	return retval;
+}
+
+int namedev_init(void)
+{
+	int retval;
+	
 	retval = namedev_init_config();
 	if (retval)
 		return retval;
@@ -463,3 +790,4 @@ int namedev_init(void)
 	return retval;
 }
 
+