#include <ctype.h>
#include <unistd.h>
#include <errno.h>
-#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"
-#include "klibc_fixups.h"
+#include "udevdb.h"
static struct sysfs_attribute *find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, char *attr);
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)
{
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;
return -1;
}
+/** Finds the lowest positive N such that <name>N isn't present in
+ * $(udevroot) either as a file or a symlink.
+ *
+ * @param name Name to check for
+ * @return 0 if <name> didn't exist and N otherwise.
+ */
+static unsigned int find_free_number (struct udevice *udev, char *name)
+{
+ char temp[NAME_SIZE];
+ char path[NAME_SIZE];
+ struct udevice dev;
+ int result;
+
+ /* have to sweep the database for each lookup */
+ result = 0;
+ strncpy(temp, name, sizeof (temp));
+ while (1) {
+ if (udevdb_get_dev_byname(temp, path, &dev) != 0)
+ goto found;
+ /* symlink might be stale if $(udevroot) isn't cleaned; check
+ * on major/minor to see if it's the same device
+ */
+ if (dev.major == udev->major && dev.minor == udev->minor)
+ goto found;
+ snprintf (temp, sizeof(temp), "%s%d", name, ++result);
+ }
+
+found:
+ return result;
+}
+
static void apply_format(struct udevice *udev, char *string, size_t maxsize,
struct sysfs_class_device *class_dev,
struct sysfs_device *sysfs_device)
int i;
char c;
char *spos;
+ char *rest;
int slen;
struct sysfs_attribute *tmpattr;
+ unsigned int next_free_number;
pos = string;
-
while (1) {
- pos = strchr(string, '%');
- if (pos != NULL) {
- pos[0] = '\0';
- tail = pos+1;
- len = 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':
- strnintcat(string, udev->minor, maxsize);
+ strintcatmax(string, udev->minor, maxsize);
dbg("substitute minor number '%u'", udev->minor);
break;
case 'M':
- strnintcat(string, udev->major, maxsize);
+ strintcatmax(string, udev->major, maxsize);
dbg("substitute major number '%u'", udev->major);
break;
case 'c':
/* get part part of the result string */
i = 0;
if (attr != NULL)
- i = atoi(attr);
+ i = strtoul(attr, &rest, 10);
if (i > 0) {
foreach_strpart(udev->program_result, " \n\r", spos, slen) {
i--;
dbg("requested part of result string not found");
break;
}
- strnfieldcpy(temp2, spos, slen+1);
- strnfieldcat(string, temp2, maxsize);
+ 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;
dbg("sysfa attribute '%s' not found", attr);
break;
}
- strnfieldcat(string, tmpattr->value, maxsize);
+ /* strip trailing whitespace of matching value */
+ if (isspace(tmpattr->value[strlen(tmpattr->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);
+ }
+ }
+ 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;
+ case 'e':
+ next_free_number = find_free_number(udev, string);
+ if (next_free_number > 0) {
+ snprintf(temp2, sizeof(temp2), "%d", next_free_number);
+ strfieldcatmax(string, temp2, maxsize);
+ }
break;
default:
dbg("unknown substitution type '%%%c'", c);
if (len > 0)
pos[len] = '\0';
- strnfieldcat(string, tail, maxsize);
- }
-}
-
-/*
- * Note, we can have multiple files for different busses in here due
- * to the mess that USB has for its device tree...
- */
-static struct bus_file {
- char *bus;
- char *file;
-} bus_files[] = {
- { .bus = "scsi", .file = "vendor" },
- { .bus = "usb", .file = "idVendor" },
- { .bus = "usb", .file = "iInterface" },
- { .bus = "usb-serial", .file = "detach_state" },
- { .bus = "ide", .file = "detach_state" },
- { .bus = "pci", .file = "vendor" },
- {}
-};
-
-#define SECONDS_TO_WAIT_FOR_FILE 10
-static void wait_for_device_to_initialize(struct sysfs_device *sysfs_device)
-{
- /* sleep until we see the file for this specific bus type show up this
- * is needed because we can easily out-run the kernel in looking for
- * these files before the paticular subsystem has created them in the
- * sysfs tree properly.
- *
- * And people thought that the /sbin/hotplug event system was going to
- * be slow, poo on you for arguing that before even testing it...
- */
- struct bus_file *b = &bus_files[0];
- struct sysfs_attribute *tmpattr;
- int found = 0;
- int loop = SECONDS_TO_WAIT_FOR_FILE;
-
- while (1) {
- if (b->bus == NULL) {
- if (!found)
- break;
- /* sleep to give the kernel a chance to create the file */
- sleep(1);
- --loop;
- if (loop == 0)
- break;
- b = &bus_files[0];
- }
- if (strcmp(sysfs_device->bus, b->bus) == 0) {
- found = 1;
- dbg("looking for file '%s' on bus '%s'", b->file, b->bus);
- tmpattr = sysfs_get_device_attr(sysfs_device, b->file);
- if (tmpattr) {
- /* found it! */
- goto exit;
- }
- dbg("can't find '%s' file", b->file);
- }
- ++b;
+ strfieldcatmax(string, tail, maxsize);
}
- if (!found)
- dbg("did not find bus type '%s' on list of bus_id_files, "
- "contact greg@kroah.com", sysfs_device->bus);
-exit:
- return; /* here to prevent compiler warning... */
}
static void fix_kernel_name(struct udevice *udev)
}
}
-static int execute_program(char *path, char *value, int len)
+static int execute_program(const 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[(PROGRAM_SIZE / 2) + 1];
int i;
- dbg("executing '%s'", path);
+ strfieldcpy(arg, path);
+ i = 0;
+ if (strchr(path, ' ')) {
+ pos = arg;
+ while (pos != NULL) {
+ if (pos[0] == '\'') {
+ /* don't separate if in apostrophes */
+ pos++;
+ argv[i] = strsep(&pos, "\'");
+ while (pos && pos[0] == ' ')
+ pos++;
+ } else {
+ argv[i] = strsep(&pos, " ");
+ }
+ dbg("arg[%i] '%s'", i, argv[i]);
+ i++;
+ }
+ argv[i] = NULL;
+ dbg("execute '%s' with parsed arguments", arg);
+ } else {
+ argv[0] = arg;
+ argv[1] = main_argv[1];
+ argv[2] = NULL;
+ dbg("execute '%s' with subsystem '%s' argument", arg, argv[1]);
+ }
+
retval = pipe(fds);
if (retval != 0) {
dbg("pipe failed");
return -1;
}
+
pid = fork();
switch(pid) {
case 0:
/* child */
- close(STDOUT_FILENO);
-
- /* dup write side of pipe to STDOUT */
- dup(fds[1]);
-
- /* copy off our path to use incase we have too many args */
- strnfieldcpy(buffer, path, sizeof(buffer));
+ /* dup2 write side of pipe to STDOUT */
+ dup2(fds[1], STDOUT_FILENO);
+ retval = execv(arg, argv);
- 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, using subshell instead '%s'", i, buffer);
- retval = execl("/bin/sh", "sh", "-c", buffer, NULL);
- } else {
- dbg("execute program '%s'", path);
- retval = execv(args[0], args);
- }
- } else {
- retval = execv(path, main_argv);
- }
info(FIELD_PROGRAM " execution of '%s' failed", path);
exit(1);
case -1:
/* 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;
return 0;
}
-static struct sysfs_device *get_sysfs_device(struct sysfs_class_device *class_dev)
-{
- struct sysfs_device *sysfs_device;
- struct sysfs_class_device *class_dev_parent;
- struct timespec tspec;
- int loop;
-
- /* Figure out where the device symlink is at. For char devices this will
- * always be in the class_dev->path. But for block devices, it's different.
- * The main block device will have the device symlink in it's path, but
- * 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...
- */
- class_dev_parent = sysfs_get_classdev_parent(class_dev);
- if (class_dev_parent)
- dbg("Really a partition");
-
- tspec.tv_sec = 0;
- tspec.tv_nsec = 10000000; /* sleep 10 millisec */
- loop = 10;
- while (loop--) {
- if (udev_sleep)
- 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')
- goto bus_found;
-
- loop = 10;
- tspec.tv_nsec = 10000000;
- while (loop--) {
- if (udev_sleep)
- nanosleep(&tspec, NULL);
- sysfs_get_device_bus(sysfs_device);
-
- if (sysfs_device->bus[0] != '\0')
- goto bus_found;
- }
- dbg("timed out waiting to find the device bus, continuing on anyway");
- goto exit;
-bus_found:
- dbg("device %s is registered with bus '%s'",
- sysfs_device->name, sysfs_device->bus);
- }
-exit:
- return sysfs_device;
-}
-
static int match_rule(struct config_device *dev, struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
{
while (1) {
/* execute external program */
if (dev->program[0] != '\0') {
+ char program[PROGRAM_SIZE];
+
dbg("check " FIELD_PROGRAM);
- 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");
+ strfieldcpy(program, dev->program);
+ apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
+ if (execute_program(program, udev->program_result, NAME_SIZE) != 0) {
+ dbg(FIELD_PROGRAM " returned nonzero");
goto try_parent;
} else {
dbg(FIELD_PROGRAM " returned successful");
}
-int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev)
+int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_dev)
{
+ struct sysfs_class_device *class_dev_parent;
struct sysfs_device *sysfs_device = NULL;
struct config_device *dev;
struct perm_device *perm;
+ struct sysinfo info;
char *pos;
udev->mode = 0;
+ dbg("class_dev->name='%s'", class_dev->name);
+
+ /* Figure out where the "device"-symlink is at. For char devices this will
+ * always be in the class_dev->path. On block devices, only the main block
+ * device will have the device symlink in it's path. All partition devices
+ * need to look at the symlink in its parent directory.
+ */
+ class_dev_parent = sysfs_get_classdev_parent(class_dev);
+ if (class_dev_parent != NULL) {
+ dbg("given class device has a parent, use this instead");
+ sysfs_device = sysfs_get_classdev_device(class_dev_parent);
+ } else {
+ sysfs_device = sysfs_get_classdev_device(class_dev);
+ }
- /* find the sysfs_device associated with this class device */
- sysfs_device = get_sysfs_device(class_dev);
if (sysfs_device) {
- dbg("sysfs_device->path='%s'", sysfs_device->path);
- dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
- dbg("sysfs_device->bus='%s'", sysfs_device->bus);
+ dbg("found devices device: path='%s', bus_id='%s', bus='%s'",
+ sysfs_device->path, sysfs_device->bus_id, sysfs_device->bus);
strfieldcpy(udev->bus_id, sysfs_device->bus_id);
- wait_for_device_to_initialize(sysfs_device);
+ strfieldcpy(udev->bus, sysfs_device->bus);
}
- dbg("class_dev->name = '%s'", class_dev->name);
strfieldcpy(udev->kernel_name, class_dev->name);
fix_kernel_name(udev);
}
if (dev->symlink[0] != '\0') {
- char temp[NAME_MAX];
+ char temp[NAME_SIZE];
info("configured rule in '%s' at line %i applied, added symlink '%s'",
dev->config_file, dev->config_line, dev->symlink);
- /* do not clobber dev */
strfieldcpy(temp, dev->symlink);
- apply_format(udev, temp, sizeof(temp),
- class_dev, sysfs_device);
+ apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device);
+ if (udev->symlink[0] != '\0')
+ strfieldcat(udev->symlink, " ");
strfieldcat(udev->symlink, temp);
- strfieldcat(udev->symlink, " ");
}
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);
}
}
}
-
/* 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->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;
}
~ianmdlvl / elogind.git / blobdiff