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unify string replacement

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This commit is contained in:
Kay Sievers 2008-11-05 21:49:52 +01:00
parent b467444884
commit 92f4313665
9 changed files with 118 additions and 181 deletions
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38
extras/ata_id/ata_id.c
View File

@ -44,38 +44,6 @@ static void log_fn(struct udev *udev, int priority,
vsyslog(priority, format, args);
}
static void set_str(char *to, const char *from, size_t count)
{
size_t i, j, len;
/* strip trailing whitespace */
len = strnlen(from, count);
while (len && isspace(from[len-1]))
len--;
/* strip leading whitespace */
i = 0;
while (isspace(from[i]) && (i < len))
i++;
j = 0;
while (i < len) {
/* substitute multiple whitespace */
if (isspace(from[i])) {
while (isspace(from[i]))
i++;
to[j++] = '_';
}
/* skip chars */
if (from[i] == '/') {
i++;
continue;
}
to[j++] = from[i++];
}
to[j] = '\0';
}
int main(int argc, char *argv[])
{
struct udev *udev;
@ -146,9 +114,9 @@ int main(int argc, char *argv[])
goto close;
}
set_str(model, (char *) id.model, 40);
set_str(serial, (char *) id.serial_no, 20);
set_str(revision, (char *) id.fw_rev, 8);
udev_util_replace_whitespace((char *) id.model, model, 40);
udev_util_replace_whitespace((char *) id.serial_no, serial, 20);
udev_util_replace_whitespace((char *) id.fw_rev, revision, 8);
if (export) {
if ((id.config >> 8) & 0x80) {

47
extras/scsi_id/scsi_id.c
View File

@ -69,39 +69,7 @@ static void log_fn(struct udev *udev, int priority,
vsyslog(priority, format, args);
}
static void set_str(char *to, const char *from, size_t count)
{
size_t i, j, len;
/* strip trailing whitespace */
len = strnlen(from, count);
while (len && isspace(from[len-1]))
len--;
/* strip leading whitespace */
i = 0;
while (isspace(from[i]) && (i < len))
i++;
j = 0;
while (i < len) {
/* substitute multiple whitespace */
if (isspace(from[i])) {
while (isspace(from[i]))
i++;
to[j++] = '_';
}
/* skip chars */
if (from[i] == '/') {
i++;
continue;
}
to[j++] = from[i++];
}
to[j] = '\0';
}
static void set_type(char *to, const char *from, size_t len)
static void set_type(const char *from, char *to, size_t len)
{
int type_num;
char *eptr;
@ -533,11 +501,10 @@ static int set_inq_values(struct udev *udev, struct scsi_id_device *dev_scsi, co
if (retval)
return retval;
set_str(vendor_str, dev_scsi->vendor, sizeof(vendor_str));
set_str(model_str, dev_scsi->model, sizeof(model_str));
set_type(type_str, dev_scsi->type, sizeof(type_str));
set_str(revision_str, dev_scsi->revision, sizeof(revision_str));
udev_util_replace_whitespace(dev_scsi->vendor, vendor_str, sizeof(vendor_str));
udev_util_replace_whitespace(dev_scsi->model, model_str, sizeof(model_str));
set_type(dev_scsi->type, type_str, sizeof(type_str));
udev_util_replace_whitespace(dev_scsi->revision, revision_str, sizeof(revision_str));
return 0;
}
@ -604,9 +571,9 @@ static int scsi_id(struct udev *udev, char *maj_min_dev)
printf("ID_VENDOR=%s\n", vendor_str);
printf("ID_MODEL=%s\n", model_str);
printf("ID_REVISION=%s\n", revision_str);
set_str(serial_str, dev_scsi.serial, sizeof(serial_str));
udev_util_replace_whitespace(dev_scsi.serial, serial_str, sizeof(serial_str));
printf("ID_SERIAL=%s\n", serial_str);
set_str(serial_str, serial_short, sizeof(serial_str));
udev_util_replace_whitespace(serial_short, serial_str, sizeof(serial_str));
printf("ID_SERIAL_SHORT=%s\n", serial_str);
printf("ID_TYPE=%s\n", type_str);
} else {

52
extras/usb_id/usb_id.c
View File

@ -46,44 +46,6 @@ static char instance_str[64];
static int use_usb_info;
static int use_num_info;
static void set_str(char *to, const char *from, size_t count)
{
size_t i, j, len;
/* strip trailing whitespace */
len = strnlen(from, count);
while (len && isspace(from[len-1]))
len--;
/* strip leading whitespace */
i = 0;
while (isspace(from[i]) && (i < len))
i++;
j = 0;
while (i < len) {
/* substitute multiple whitespace */
if (isspace(from[i])) {
while (isspace(from[i]))
i++;
to[j++] = '_';
}
/* Replace '/' with '.' */
if (from[i] == '/') {
to[j++] = '.';
i++;
continue;
}
/* skip non-printable chars */
if (!isalnum(from[i]) && !ispunct(from[i])) {
i++;
continue;
}
to[j++] = from[i++];
}
to[j] = '\0';
}
static void set_usb_iftype(char *to, int if_class_num, size_t len)
{
char *type = "generic";
@ -274,7 +236,7 @@ static int usb_id(struct udev_device *dev)
udev_device_get_sysname(dev_scsi));
goto fallback;
}
set_str(vendor_str, scsi_vendor, sizeof(vendor_str)-1);
udev_util_replace_whitespace(scsi_vendor, vendor_str, sizeof(vendor_str)-1);
scsi_model = udev_device_get_sysattr_value(dev_scsi, "model");
if (!scsi_model) {
@ -282,7 +244,7 @@ static int usb_id(struct udev_device *dev)
udev_device_get_sysname(dev_scsi));
goto fallback;
}
set_str(model_str, scsi_model, sizeof(model_str)-1);
udev_util_replace_whitespace(scsi_model, model_str, sizeof(model_str)-1);
scsi_type = udev_device_get_sysattr_value(dev_scsi, "type");
if (!scsi_type) {
@ -298,7 +260,7 @@ static int usb_id(struct udev_device *dev)
udev_device_get_sysname(dev_scsi));
goto fallback;
}
set_str(revision_str, scsi_rev, sizeof(revision_str)-1);
udev_util_replace_whitespace(scsi_rev, revision_str, sizeof(revision_str)-1);
/*
* some broken devices have the same identifiers
@ -322,7 +284,7 @@ fallback:
info(udev, "No USB vendor information available\n");
return 1;
}
set_str(vendor_str, usb_vendor, sizeof(vendor_str)-1);
udev_util_replace_whitespace(usb_vendor, vendor_str, sizeof(vendor_str)-1);
}
if (model_str[0] == '\0') {
@ -338,7 +300,7 @@ fallback:
dbg(udev, "No USB model information available\n");
return 1;
}
set_str(model_str, usb_model, sizeof(model_str)-1);
udev_util_replace_whitespace(usb_model, model_str, sizeof(model_str)-1);
}
if (revision_str[0] == '\0') {
@ -346,7 +308,7 @@ fallback:
usb_rev = udev_device_get_sysattr_value(dev_usb, "bcdDevice");
if (usb_rev)
set_str(revision_str, usb_rev, sizeof(revision_str)-1);
udev_util_replace_whitespace(usb_rev, revision_str, sizeof(revision_str)-1);
}
if (serial_str[0] == '\0') {
@ -354,7 +316,7 @@ fallback:
usb_serial = udev_device_get_sysattr_value(dev_usb, "serial");
if (usb_serial)
set_str(serial_str, usb_serial, sizeof(serial_str)-1);
udev_util_replace_whitespace(usb_serial, serial_str, sizeof(serial_str)-1);
}
return 0;
}

40
extras/volume_id/vol_id.c
View File

@ -66,38 +66,6 @@ static void vid_log(int priority, const char *file, int line, const char *format
return;
}
static void set_str(char *to, const char *from, size_t count)
{
size_t i, j, len;
/* strip trailing whitespace */
len = strnlen(from, count);
while (len && isspace(from[len-1]))
len--;
/* strip leading whitespace */
i = 0;
while (isspace(from[i]) && (i < len))
i++;
j = 0;
while (i < len) {
/* substitute multiple whitespace */
if (isspace(from[i])) {
while (isspace(from[i]))
i++;
to[j++] = '_';
}
/* skip chars */
if (from[i] == '/') {
i++;
continue;
}
to[j++] = from[i++];
}
to[j] = '\0';
}
static int all_probers(volume_id_probe_fn_t probe_fn,
struct volume_id *id, uint64_t off, uint64_t size,
void *data)
@ -288,12 +256,12 @@ int main(int argc, char *argv[])
goto exit;
}
set_str(label_safe, label, sizeof(label_safe));
util_replace_chars(label_safe, ALLOWED_CHARS_INPUT);
udev_util_replace_whitespace(label, label_safe, sizeof(label_safe));
udev_util_replace_chars(label_safe, UDEV_ALLOWED_CHARS_INPUT);
volume_id_encode_string(label, label_enc, sizeof(label_enc));
set_str(uuid_safe, uuid, sizeof(uuid_safe));
util_replace_chars(uuid_safe, ALLOWED_CHARS_INPUT);
udev_util_replace_whitespace(uuid, uuid_safe, sizeof(uuid_safe));
udev_util_replace_chars(uuid_safe, UDEV_ALLOWED_CHARS_INPUT);
volume_id_encode_string(uuid, uuid_enc, sizeof(uuid_enc));
volume_id_encode_string(type, type_enc, sizeof(type_enc));

11
udev/lib/libudev-private.h
View File

@ -159,9 +159,10 @@ extern int udev_queue_export_device_finished(struct udev_queue *udev_queue, stru
extern int udev_queue_export_device_failed(struct udev_queue *udev_queue, struct udev_device *udev_device);
/* libudev-utils */
#define UTIL_PATH_SIZE 1024
#define UTIL_LINE_SIZE 2048
#define UTIL_NAME_SIZE 512
#define UTIL_PATH_SIZE 1024
#define UTIL_LINE_SIZE 2048
#define UTIL_NAME_SIZE 512
#define UDEV_ALLOWED_CHARS_INPUT "/ $%?,"
extern ssize_t util_get_sys_subsystem(struct udev *udev, const char *syspath, char *subsystem, size_t size);
extern ssize_t util_get_sys_driver(struct udev *udev, const char *syspath, char *driver, size_t size);
extern int util_resolve_sys_link(struct udev *udev, char *syspath, size_t size);
@ -171,5 +172,7 @@ extern size_t util_path_decode(char *s);
extern void util_remove_trailing_chars(char *path, char c);
extern size_t util_strlcpy(char *dst, const char *src, size_t size);
extern size_t util_strlcat(char *dst, const char *src, size_t size);
extern int util_replace_chars(char *str, const char *white);
extern int udev_util_replace_whitespace(const char *str, char *to, size_t len);
extern int udev_util_replace_chars(char *str, const char *white);
extern int udev_util_encode_string(const char *str, char *str_enc, size_t len);
#endif

97
udev/lib/libudev-util.c
View File

@ -331,8 +331,47 @@ static int utf8_encoded_valid_unichar(const char *str)
return len;
}
int udev_util_replace_whitespace(const char *str, char *to, size_t len)
{
size_t i, j;
/* strip trailing whitespace */
len = strnlen(str, len);
while (len && isspace(str[len-1]))
len--;
/* strip leading whitespace */
i = 0;
while (isspace(str[i]) && (i < len))
i++;
j = 0;
while (i < len) {
/* substitute multiple whitespace with a single '_' */
if (isspace(str[i])) {
while (isspace(str[i]))
i++;
to[j++] = '_';
}
to[j++] = str[i++];
}
to[j] = '\0';
return 0;
}
static int is_whitelisted(char c, const char *white)
{
if ((c >= '0' && c <= '9') ||
(c >= 'A' && c <= 'Z') ||
(c >= 'a' && c <= 'z') ||
strchr("#+-.:=@_", c) != NULL ||
(white != NULL && strchr(white, c) != NULL))
return 1;
return 0;
}
/* allow chars in whitelist, plain ascii, hex-escaping and valid utf8 */
int util_replace_chars(char *str, const char *white)
int udev_util_replace_chars(char *str, const char *white)
{
size_t i = 0;
int replaced = 0;
@ -340,16 +379,7 @@ int util_replace_chars(char *str, const char *white)
while (str[i] != '\0') {
int len;
/* accept whitelist */
if (white != NULL && strchr(white, str[i]) != NULL) {
i++;
continue;
}
/* accept plain ascii char */
if ((str[i] >= '0' && str[i] <= '9') ||
(str[i] >= 'A' && str[i] <= 'Z') ||
(str[i] >= 'a' && str[i] <= 'z')) {
if (is_whitelisted(str[i], white)) {
i++;
continue;
}
@ -380,6 +410,49 @@ int util_replace_chars(char *str, const char *white)
i++;
replaced++;
}
return replaced;
}
/**
* util_encode_string:
* @str: input string to be encoded
* @str_enc: output string to store the encoded input string
* @len: maximum size of the output string, which may be
* four times as long as the input string
*
* Encode all potentially unsafe characters of a string to the
* corresponding hex value prefixed by '\x'.
*
* Returns: 0 if the entire string was copied, non-zero otherwise.
**/
int udev_util_encode_string(const char *str, char *str_enc, size_t len)
{
size_t i, j;
if (str == NULL || str_enc == NULL || len == 0)
return -1;
str_enc[0] = '\0';
for (i = 0, j = 0; str[i] != '\0'; i++) {
int seqlen;
seqlen = utf8_encoded_valid_unichar(&str[i]);
if (seqlen > 1) {
memcpy(&str_enc[j], &str[i], seqlen);
j += seqlen;
i += (seqlen-1);
} else if (str[i] == '\\' || !is_whitelisted(str[i], NULL)) {
sprintf(&str_enc[j], "\\x%02x", (unsigned char) str[i]);
j += 4;
} else {
str_enc[j] = str[i];
j++;
}
if (j+3 >= len)
goto err;
}
str_enc[j] = '\0';
return 0;
err:
return -1;
}

2
udev/udev-event.c
View File

@ -319,7 +319,7 @@ found:
size = strlen(value);
while (size > 0 && isspace(value[--size]))
value[size] = '\0';
count = util_replace_chars(value, ALLOWED_CHARS_INPUT);
count = udev_util_replace_chars(value, UDEV_ALLOWED_CHARS_INPUT);
if (count > 0)
info(event->udev, "%i character(s) replaced\n" , count);
util_strlcat(string, value, maxsize);

8
udev/udev-rules.c
View File

@ -2085,7 +2085,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event
util_remove_trailing_chars(result, '\n');
if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
count = util_replace_chars(result, ALLOWED_CHARS_INPUT);
count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
if (count > 0)
info(event->udev, "%i character(s) replaced\n" , count);
}
@ -2284,7 +2284,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event
util_strlcpy(name_str, name, sizeof(name_str));
udev_event_apply_format(event, name_str, sizeof(name_str));
if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
count = util_replace_chars(name_str, ALLOWED_CHARS_FILE);
count = udev_util_replace_chars(name_str, "/");
if (count > 0)
info(event->udev, "%i character(s) replaced\n", count);
free(event->name);
@ -2316,9 +2316,9 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event
util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
udev_event_apply_format(event, temp, sizeof(temp));
if (esc == ESCAPE_UNSET)
count = util_replace_chars(temp, ALLOWED_CHARS_FILE " ");
count = udev_util_replace_chars(temp, "/ ");
else if (esc == ESCAPE_REPLACE)
count = util_replace_chars(temp, ALLOWED_CHARS_FILE);
count = udev_util_replace_chars(temp, "/");
if (count > 0)
info(event->udev, "%i character(s) replaced\n" , count);
dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);

4
udev/udev.h
View File

@ -26,10 +26,6 @@
#include "lib/libudev.h"
#include "lib/libudev-private.h"
#define ALLOWED_CHARS "#+-.:=@_"
#define ALLOWED_CHARS_FILE ALLOWED_CHARS "/"
#define ALLOWED_CHARS_INPUT ALLOWED_CHARS_FILE " $%?,"
#define DEFAULT_FAKE_PARTITIONS_COUNT 15
#define UDEV_EVENT_TIMEOUT 180