#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"
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;
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;
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;
if (pos != NULL) {
pos[0] = '\0';
tail = pos+1;
- num = get_format_len(&tail);
+ len = get_format_len(&tail);
c = tail[0];
strfieldcpy(temp, tail+1);
tail = temp;
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':
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;
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);
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);
}
}
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:
/* 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));
-
- 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);
- }
+ 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);
}
+
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] == '\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;
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;
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)
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");
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') {
+ 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;
+ }
}
}
goto done;
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);
udev->partitions = dev->partitions;
+ strfieldcpy(udev->config_file, dev->config_file);
+ udev->config_line = dev->config_line;
+
+ /* get permissions given in rule */
+ set_empty_perms(udev, dev->mode,
+ dev->owner,
+ dev->group);
+
done:
+ /* 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);
+ /* store time of action */
+ udev->config_time = time(NULL);
+
return 0;
}
~ianmdlvl / elogind.git / blobdiff