X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=namedev.c;h=52417e3793b655fcca041ff1ead58e7a0ba8d4ce;hp=21f52d1f3cfa31811110997d762be77e12744a1d;hb=eb6c7cd03635ffc28798734f0b87b9e21dae6f9e;hpb=3fe0734266becd2ebcb111b07c3e17b2a9780477

diff --git a/namedev.c b/namedev.c
index 21f52d1f3..52417e379 100644
--- a/namedev.c
+++ b/namedev.c
@@ -32,10 +32,12 @@
 #include <time.h>
 #include <sys/wait.h>
 #include <sys/stat.h>
+#include <sys/sysinfo.h>
 
 #include "libsysfs/sysfs/libsysfs.h"
 #include "list.h"
 #include "udev.h"
+#include "udev_lib.h"
 #include "udev_version.h"
 #include "logging.h"
 #include "namedev.h"
@@ -46,6 +48,7 @@ static struct sysfs_attribute *find_sysfs_attribute(struct sysfs_class_device *c
 LIST_HEAD(config_device_list);
 LIST_HEAD(perm_device_list);
 
+
 /* compare string with pattern (supports * ? [0-9] [!A-Z]) */
 static int strcmp_pattern(const char *p, const char *s)
 {
@@ -99,39 +102,6 @@ static int strcmp_pattern(const char *p, const char *s)
 	return 1;
 }
 
-#define copy_var(a, b, var)		\
-	if (b->var)			\
-		a->var = b->var;
-
-#define copy_string(a, b, var)		\
-	if (strlen(b->var))		\
-		strcpy(a->var, b->var);
-
-int add_perm_dev(struct perm_device *new_dev)
-{
-	struct perm_device *dev;
-	struct perm_device *tmp_dev;
-
-	/* update the values if we already have the device */
-	list_for_each_entry(dev, &perm_device_list, node) {
-		if (strcmp(new_dev->name, dev->name))
-			continue;
-		copy_var(dev, new_dev, mode);
-		copy_string(dev, new_dev, owner);
-		copy_string(dev, new_dev, group);
-		return 0;
-	}
-
-	/* not found, add new structure to the perm list */
-	tmp_dev = malloc(sizeof(*tmp_dev));
-	if (!tmp_dev)
-		return -ENOMEM;
-	memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
-	list_add_tail(&tmp_dev->node, &perm_device_list);
-	//dump_perm_dev(tmp_dev);
-	return 0;
-}
-
 static struct perm_device *find_perm(char *name)
 {
 	struct perm_device *perm;
@@ -198,7 +168,7 @@ static int get_format_len(char **str)
 
 	if (isdigit(*str[0])) {
 		num = (int) strtoul(*str, &tail, 10);
-		if (tail != NULL) {
+		if (num > 0) {
 			*str = tail;
 			dbg("format length=%i", num);
 			return num;
@@ -214,86 +184,86 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
 			 struct sysfs_device *sysfs_device)
 {
 	char temp[NAME_SIZE];
-	char temp1[NAME_SIZE];
+	char temp2[NAME_SIZE];
 	char *tail;
 	char *pos;
-	char *pos2;
-	char *pos3;
 	char *attr;
-	int num;
+	int len;
 	int i;
 	char c;
+	char *spos;
+	char *rest;
+	int slen;
 	struct sysfs_attribute *tmpattr;
 
 	pos = string;
-
 	while (1) {
-		pos = strchr(string, '%');
-		if (pos != NULL) {
-			pos[0] = '\0';
-			tail = pos+1;
-			num = get_format_len(&tail);
-			c = tail[0];
-			strfieldcpy(temp, tail+1);
-			tail = temp;
-		} else {
+		pos = strchr(pos, '%');
+		if (pos == NULL)
 			break;
-		}
-		dbg("format=%c, string='%s', tail='%s'",c , string, tail);
 
+		pos[0] = '\0';
+		tail = pos+1;
+		len = get_format_len(&tail);
+		c = tail[0];
+		strfieldcpy(temp, tail+1);
+		tail = temp;
+		dbg("format=%c, string='%s', tail='%s'",c , string, tail);
 		attr = get_format_attribute(&tail);
 
+
 		switch (c) {
 		case 'b':
 			if (strlen(udev->bus_id) == 0)
 				break;
-			strnfieldcat(string, udev->bus_id, maxsize);
+			strfieldcatmax(string, udev->bus_id, maxsize);
 			dbg("substitute bus_id '%s'", udev->bus_id);
 			break;
 		case 'k':
 			if (strlen(udev->kernel_name) == 0)
 				break;
-			strnfieldcat(string, udev->kernel_name, maxsize);
+			strfieldcatmax(string, udev->kernel_name, maxsize);
 			dbg("substitute kernel name '%s'", udev->kernel_name);
 			break;
 		case 'n':
 			if (strlen(udev->kernel_number) == 0)
 				break;
-			strnfieldcat(string, udev->kernel_number, maxsize);
+			strfieldcatmax(string, udev->kernel_number, maxsize);
 			dbg("substitute kernel number '%s'", udev->kernel_number);
 				break;
 		case 'm':
-			sprintf(pos, "%u", udev->minor);
+			strintcatmax(string, udev->minor, maxsize);
 			dbg("substitute minor number '%u'", udev->minor);
 			break;
-			case 'M':
-			sprintf(pos, "%u", udev->major);
+		case 'M':
+			strintcatmax(string, udev->major, maxsize);
 			dbg("substitute major number '%u'", udev->major);
 			break;
 		case 'c':
 			if (strlen(udev->program_result) == 0)
 				break;
 			/* get part part of the result string */
-			i = num; /* num syntax is deprecated and will be removed  */
+			i = 0;
 			if (attr != NULL)
-				i = atoi(attr);
+				i = strtoul(attr, &rest, 10);
 			if (i > 0) {
-				strfieldcpy(temp1, udev->program_result);
-				pos2 = temp1;
-				while (i) {
+				foreach_strpart(udev->program_result, " \n\r", spos, slen) {
 					i--;
-					pos3 = strsep(&pos2, " ");
-					if (pos3 == NULL) {
-						dbg("requested part of result string not found");
+					if (i == 0)
 						break;
-					}
 				}
-				if (pos3) {
-					strnfieldcat(string, pos3, maxsize);
-					dbg("substitute part of result string '%s'", pos3);
+				if (i > 0) {
+					dbg("requested part of result string not found");
+					break;
 				}
+				if (rest[0] == '+')
+					strfieldcpy(temp2, spos);
+				else
+					strfieldcpymax(temp2, spos, slen+1);
+				strfieldcatmax(string, temp2, maxsize);
+				dbg("substitute part of result string '%s'", temp2);
 			} else {
-				strnfieldcat(string, udev->program_result, maxsize);
+				strfieldcatmax(string, udev->program_result, maxsize);
 				dbg("substitute result string '%s'", udev->program_result);
 			}
 			break;
@@ -304,20 +274,25 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
 					dbg("sysfa attribute '%s' not found", attr);
 					break;
 				}
-				strnfieldcat(string, tmpattr->value, maxsize);
+				strfieldcatmax(string, tmpattr->value, maxsize);
 				dbg("substitute sysfs value '%s'", tmpattr->value);
 			} else {
 				dbg("missing attribute");
 			}
 			break;
 		case '%':
-			strnfieldcat(string, "%", maxsize);
+			strfieldcatmax(string, "%", maxsize);
+			pos++;
 			break;
 		default:
 			dbg("unknown substitution type '%%%c'", c);
 			break;
 		}
-		strnfieldcat(string, tail, maxsize);
+		/* truncate to specified length */
+		if (len > 0)
+			pos[len] = '\0';
+
+		strfieldcatmax(string, tail, maxsize);
 	}
 }
 
@@ -400,45 +375,58 @@ static void fix_kernel_name(struct udevice *udev)
 static int execute_program(char *path, char *value, int len)
 {
 	int retval;
-	int res;
+	int count;
 	int status;
 	int fds[2];
 	pid_t pid;
-	int value_set = 0;
-	char buffer[255];
 	char *pos;
-	char *args[PROGRAM_MAXARG];
+	char arg[PROGRAM_SIZE];
+	char *argv[sizeof(arg) / 2];
 	int i;
 
-	dbg("executing '%s'", path);
+	i = 0;
+	if (strchr(path, ' ')) {
+		strfieldcpy(arg, path);
+		pos = arg;
+		while (pos != NULL) {
+			if (pos[0] == '\'') {
+				/* don't separate if in apostrophes */
+				pos++;
+				argv[i] = strsep(&pos, "\'");
+				while (pos[0] == ' ')
+					pos++;
+		} else {
+				argv[i] = strsep(&pos, " ");
+			}
+			dbg("arg[%i] '%s'", i, argv[i]);
+			i++;
+		}
+	}
+	argv[i] =  NULL;
+
 	retval = pipe(fds);
 	if (retval != 0) {
 		dbg("pipe failed");
 		return -1;
 	}
+
 	pid = fork();
 	switch(pid) {
 	case 0:
 		/* child */
 		close(STDOUT_FILENO);
-		dup(fds[1]);	/* dup write side of pipe to STDOUT */
-		if (strchr(path, ' ')) {
-			/* exec with arguments */
-			pos = path;
-			for (i=0; i < PROGRAM_MAXARG-1; i++) {
-				args[i] = strsep(&pos, " ");
-				if (args[i] == NULL)
-					break;
-			}
-			if (args[i]) {
-				dbg("too many args - %d", i);
-				args[i] = NULL;
-			}
-			retval = execv(args[0], args);
+
+		/* dup write side of pipe to STDOUT */
+		dup(fds[1]);
+		if (argv[0] !=  NULL) {
+			dbg("execute '%s' with given arguments", argv[0]);
+			retval = execv(argv[0], argv);
 		} else {
+			dbg("execute '%s' with main argument", path);
 			retval = execv(path, main_argv);
 		}
-		dbg("child execve failed");
+
+		info(FIELD_PROGRAM " execution of '%s' failed", path);
 		exit(1);
 	case -1:
 		dbg("fork failed");
@@ -447,34 +435,33 @@ static int execute_program(char *path, char *value, int len)
 		/* parent reads from fds[0] */
 		close(fds[1]);
 		retval = 0;
+		i = 0;
 		while (1) {
-			res = read(fds[0], buffer, sizeof(buffer) - 1);
-			if (res <= 0)
+			count = read(fds[0], value + i, len - i-1);
+			if (count <= 0)
 				break;
-			buffer[res] = '\0';
-			if (res > len) {
+
+			i += count;
+			if (i >= len-1) {
 				dbg("result len %d too short", len);
 				retval = -1;
-			}
-			if (value_set) {
-				dbg("result value already set");
-				retval = -1;
-			} else {
-				value_set = 1;
-				strncpy(value, buffer, len);
-				pos = value + strlen(value)-1;
-				if (pos[0] == '\n')
-					pos[0] = '\0';
-				dbg("result is '%s'", value);
+				break;
 			}
 		}
-		close(fds[0]);
-		res = wait(&status);
-		if (res < 0) {
-			dbg("wait failed result %d", res);
+
+		if (count < 0) {
+			dbg("read failed with '%s'", strerror(errno));
 			retval = -1;
 		}
 
+		if (i > 0 && value[i-1] == '\n')
+			i--;
+		value[i] = '\0';
+		dbg("result is '%s'", value);
+
+		close(fds[0]);
+		wait(&status);
+
 		if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
 			dbg("exec program status 0x%x", status);
 			retval = -1;
@@ -515,6 +502,8 @@ attr_found:
 static int compare_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, struct sysfs_pair *pair)
 {
 	struct sysfs_attribute *tmpattr;
+	int i;
+	int len;
 
 	if ((pair == NULL) || (pair->file[0] == '\0') || (pair->value == '\0'))
 		return -ENODEV;
@@ -523,6 +512,18 @@ static int compare_sysfs_attribute(struct sysfs_class_device *class_dev, struct
 	if (tmpattr == NULL)
 		return -ENODEV;
 
+	/* strip trailing whitespace of value, if not asked to match for it */
+	if (! isspace(pair->value[strlen(pair->value)-1])) {
+		i = len = strlen(tmpattr->value);
+		while (i > 0 &&  isspace(tmpattr->value[i-1]))
+			i--;
+		if (i < len) {
+			tmpattr->value[i] = '\0';
+			dbg("remove %i trailing whitespace chars from '%s'",
+			    len - i, tmpattr->value);
+		}
+	}
+
 	dbg("compare attribute '%s' value '%s' with '%s'",
 		  pair->file, tmpattr->value, pair->value);
 	if (strcmp_pattern(pair->value, tmpattr->value) != 0)
@@ -601,6 +602,42 @@ static int match_place(struct config_device *dev, struct sysfs_class_device *cla
 	return 0;
 }
 
+static int whitelist_search(struct sysfs_class_device *class_dev)
+{
+	char *sysblock = "/sys/block";
+  	int i;
+
+  	static char *list[] = {
+  		"nb",
+  		"ram",
+  		"loop",
+		"fd",
+  		"md",
+		"dos_cd",
+		"double",
+  		"flash",
+		"msd",
+		"rflash",
+  		"rom",
+		"rrom",
+  		"sbpcd",
+  		"pcd",
+  		"pf",
+  		"scd",
+  		"ubd",
+		NULL,
+  	};
+
+	if (strncmp(class_dev->path, sysblock, strlen(sysblock)))
+		return 0;
+
+	for (i=0; list[i] != NULL; i++)
+		if (!strncmp(class_dev->name, list[i], strlen(list[i])))
+			return 1;
+
+	return 0;
+}
+
 static struct sysfs_device *get_sysfs_device(struct sysfs_class_device *class_dev)
 {
 	struct sysfs_device *sysfs_device;
@@ -614,37 +651,39 @@ static struct sysfs_device *get_sysfs_device(struct sysfs_class_device *class_de
 	 * all partitions have the symlink in its parent directory.
 	 * But we need to watch out for block devices that do not have parents, yet
 	 * look like a partition (fd0, loop0, etc.)  They all do not have a device
-	 * symlink yet.  We do sit and spin on waiting for them right now, we should
-	 * possibly have a whitelist for these devices here...
+	 * symlink yet.  We do sit and spin on waiting for them right now unless
+	 * they happen to be in the whitelist in which case we exit.
 	 */
 	class_dev_parent = sysfs_get_classdev_parent(class_dev);
-	if (class_dev_parent) 
-		dbg("Really a partition");
+	if (class_dev_parent != NULL) 
+		dbg("given class device has a parent, use this instead");
 
 	tspec.tv_sec = 0;
 	tspec.tv_nsec = 10000000;  /* sleep 10 millisec */
 	loop = 10;
 	while (loop--) {
-		if (udev_sleep)
+		if (udev_sleep) {
+			if (whitelist_search(class_dev)) {
+				sysfs_device = NULL;
+				goto exit;
+			}
 			nanosleep(&tspec, NULL);
+		}
+
 		if (class_dev_parent)
 			sysfs_device = sysfs_get_classdev_device(class_dev_parent);
 		else
 			sysfs_device = sysfs_get_classdev_device(class_dev);
-
 		if (sysfs_device != NULL)
 			goto device_found;
 	}
 	dbg("timed out waiting for device symlink, continuing on anyway...");
-	
+
 device_found:
         /* We have another issue with just the wait above - the sysfs part of
 	 * the kernel may not be quick enough to have created the link to the
 	 * device under the "bus" subsystem. Due to this, the sysfs_device->bus
 	 * will not contain the actual bus name :(
-	 *
-	 * Libsysfs now provides a new API sysfs_get_device_bus(), so use it
-	 * if needed
 	 */
         if (sysfs_device) {
 		if (sysfs_device->bus[0] != '\0')
@@ -738,7 +777,7 @@ static int match_rule(struct config_device *dev, struct sysfs_class_device *clas
 			apply_format(udev, dev->program, sizeof(dev->program),
 				     class_dev, sysfs_device);
 			if (execute_program(dev->program, udev->program_result, NAME_SIZE) != 0) {
-				dbg(FIELD_PROGRAM " returned nozero");
+				dbg(FIELD_PROGRAM " returned nonzero");
 				goto try_parent;
 			} else {
 				dbg(FIELD_PROGRAM " returned successful");
@@ -778,6 +817,7 @@ int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *ud
 	struct sysfs_device *sysfs_device = NULL;
 	struct config_device *dev;
 	struct perm_device *perm;
+	struct sysinfo info;
 	char *pos;
 
 	udev->mode = 0;
@@ -808,46 +848,80 @@ int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *ud
 	list_for_each_entry(dev, &config_device_list, node) {
 		dbg("process rule");
 		if (match_rule(dev, class_dev, udev, sysfs_device) == 0) {
-			if (dev->name[0] == '\0') {
+			if (dev->name[0] == '\0' && dev->symlink[0] == '\0') {
 				info("configured rule in '%s' at line %i applied, '%s' is ignored",
-				     udev_rules_filename, dev->config_line, udev->kernel_name);
+				     dev->config_file, dev->config_line, udev->kernel_name);
 				return -1;
 			}
 
-			info("configured rule in '%s' at line %i applied, '%s' becomes '%s'",
-			     udev_rules_filename, dev->config_line, udev->kernel_name, dev->name);
-			strfieldcpy(udev->name, dev->name);
-			strfieldcpy(udev->symlink, dev->symlink);
-			goto found;
+			if (dev->symlink[0] != '\0') {
+				char temp[NAME_SIZE];
+
+				info("configured rule in '%s' at line %i applied, added symlink '%s'",
+				     dev->config_file, dev->config_line, dev->symlink);
+				strfieldcpy(temp, dev->symlink);
+				apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device);
+				if (udev->symlink[0] != '\0')
+					strfieldcat(udev->symlink, " ");
+				strfieldcat(udev->symlink, temp);
+			}
+
+			if (dev->name[0] != '\0') {
+				/* apply all_partitions flag only at a main block device */
+				if (dev->partitions > 0 &&
+				    (udev->type != 'b' || udev->kernel_number[0] != '\0'))
+					continue;
+
+				info("configured rule in '%s' at line %i applied, '%s' becomes '%s'",
+				     dev->config_file, dev->config_line, udev->kernel_name, dev->name);
+				strfieldcpy(udev->name, dev->name);
+				goto found;
+			}
 		}
 	}
-
 	/* no rule was found so we use the kernel name */
 	strfieldcpy(udev->name, udev->kernel_name);
-	goto done;
+	if (udev->type == 'n')
+		goto done;
+	else
+		goto perms;
 
 found:
-	/* substitute placeholder */
-	apply_format(udev, udev->name, sizeof(udev->name),
-		     class_dev, sysfs_device);
-	apply_format(udev, udev->symlink, sizeof(udev->symlink),
-		     class_dev, sysfs_device);
+	apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device);
+	strfieldcpy(udev->config_file, dev->config_file);
+	udev->config_line = dev->config_line;
+
+	if (udev->type == 'n')
+		goto done;
+
 	udev->partitions = dev->partitions;
-done:
+
+	/* get permissions given in rule */
+	set_empty_perms(udev, dev->mode,
+			      dev->owner,
+			      dev->group);
+
+perms:
+	/* get permissions given in config file or set defaults */
 	perm = find_perm(udev->name);
-	if (perm) {
-		udev->mode = perm->mode;
-		strfieldcpy(udev->owner, perm->owner);
-		strfieldcpy(udev->group, perm->group);
+	if (perm != NULL) {
+		set_empty_perms(udev, perm->mode,
+				      perm->owner,
+				      perm->group);
 	} else {
-		/* no matching perms found :( */
-		udev->mode = get_default_mode();
-		strfieldcpy(udev->owner, get_default_owner());
-		strfieldcpy(udev->group, get_default_group());
+		set_empty_perms(udev, get_default_mode(),
+				      get_default_owner(),
+				      get_default_group());
 	}
+
 	dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o",
 	    udev->name, udev->owner, udev->group, udev->mode);
 
+done:
+	/* store time of action */
+	sysinfo(&info);
+	udev->config_uptime = info.uptime;
+
 	return 0;
 }