chiark / gitweb /
[PATCH] replace strncpy()/strncat() by strlcpy()/strlcat()
[elogind.git] / namedev.c
index 49f9e4b1f48e30f21068179162d7b1015944eaed..9c73c0814970e515c76694fd3951c590cf28d9a5 100644 (file)
--- a/namedev.c
+++ b/namedev.c
@@ -35,6 +35,7 @@
 
 #include "libsysfs/sysfs/libsysfs.h"
 #include "list.h"
+#include "udev_libc_wrapper.h"
 #include "udev.h"
 #include "udev_utils.h"
 #include "udev_version.h"
@@ -144,14 +145,14 @@ static int get_format_len(char **str)
  */
 static int find_free_number(struct udevice *udev, const char *name)
 {
-       char devpath[NAME_SIZE];
-       char filename[NAME_SIZE];
+       char devpath[PATH_SIZE];
+       char filename[PATH_SIZE];
        int num = 0;
 
-       strfieldcpy(filename, name);
+       strlcpy(filename, name, sizeof(filename));
        while (1) {
                dbg("look for existing node '%s'", filename);
-               if (udev_db_search_name(devpath, DEVPATH_SIZE, filename) != 0) {
+               if (udev_db_search_name(devpath, sizeof(devpath), filename) != 0) {
                        dbg("free num=%d", num);
                        return num;
                }
@@ -161,16 +162,16 @@ static int find_free_number(struct udevice *udev, const char *name)
                        info("find_free_number gone crazy (num=%d), aborted", num);
                        return -1;
                }
-               snprintf(filename, NAME_SIZE, "%s%d", name, num);
-               filename[NAME_SIZE-1] = '\0';
+               snprintf(filename, sizeof(filename), "%s%d", name, num);
+               filename[sizeof(filename)-1] = '\0';
        }
 }
 
 static void apply_format(struct udevice *udev, char *string, size_t maxsize,
                         struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
 {
-       char temp[NAME_SIZE];
-       char temp2[NAME_SIZE];
+       char temp[PATH_SIZE];
+       char temp2[PATH_SIZE];
        char *tail, *pos, *cpos, *attr, *rest;
        int len;
        int i;
@@ -189,36 +190,36 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
                tail = pos+1;
                len = get_format_len(&tail);
                c = tail[0];
-               strfieldcpy(temp, tail+1);
+               strlcpy(temp, tail+1, sizeof(temp));
                tail = temp;
                dbg("format=%c, string='%s', tail='%s'",c , string, tail);
                attr = get_format_attribute(&tail);
 
                switch (c) {
                case 'p':
-                       strfieldcatmax(string, udev->devpath, maxsize);
+                       strlcat(string, udev->devpath, maxsize);
                        dbg("substitute kernel name '%s'", udev->kernel_name);
                        break;
                case 'b':
-                       strfieldcatmax(string, udev->bus_id, maxsize);
+                       strlcat(string, udev->bus_id, maxsize);
                        dbg("substitute bus_id '%s'", udev->bus_id);
                        break;
                case 'k':
-                       strfieldcatmax(string, udev->kernel_name, maxsize);
+                       strlcat(string, udev->kernel_name, maxsize);
                        dbg("substitute kernel name '%s'", udev->kernel_name);
                        break;
                case 'n':
-                       strfieldcatmax(string, udev->kernel_number, maxsize);
+                       strlcat(string, udev->kernel_number, maxsize);
                        dbg("substitute kernel number '%s'", udev->kernel_number);
                                break;
                case 'm':
                        sprintf(temp2, "%d", minor(udev->devt));
-                       strfieldcatmax(string, temp2, maxsize);
+                       strlcat(string, temp2, maxsize);
                        dbg("substitute minor number '%s'", temp2);
                        break;
                case 'M':
                        sprintf(temp2, "%d", major(udev->devt));
-                       strfieldcatmax(string, temp2, maxsize);
+                       strlcat(string, temp2, maxsize);
                        dbg("substitute major number '%s'", temp2);
                        break;
                case 'c':
@@ -241,17 +242,17 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
                                        dbg("requested part of result string not found");
                                        break;
                                }
-                               strfieldcpy(temp2, cpos);
+                               strlcpy(temp2, cpos, sizeof(temp2));
                                /* %{2+}c copies the whole string from the second part on */
                                if (rest[0] != '+') {
                                        cpos = strchr(temp2, ' ');
                                        if (cpos)
                                                cpos[0] = '\0';
                                }
-                               strfieldcatmax(string, temp2, maxsize);
+                               strlcat(string, temp2, maxsize);
                                dbg("substitute part of result string '%s'", temp2);
                        } else {
-                               strfieldcatmax(string, udev->program_result, maxsize);
+                               strlcat(string, udev->program_result, maxsize);
                                dbg("substitute result string '%s'", udev->program_result);
                        }
                        break;
@@ -278,18 +279,18 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
                                                 len - i, tmpattr->value);
                                }
                        }
-                       strfieldcatmax(string, tmpattr->value, maxsize);
+                       strlcat(string, tmpattr->value, maxsize);
                        dbg("substitute sysfs value '%s'", tmpattr->value);
                        break;
                case '%':
-                       strfieldcatmax(string, "%", maxsize);
+                       strlcat(string, "%", maxsize);
                        pos++;
                        break;
                case 'e':
                        next_free_number = find_free_number(udev, string);
                        if (next_free_number > 0) {
                                sprintf(temp2, "%d", next_free_number);
-                               strfieldcatmax(string, temp2, maxsize);
+                               strlcat(string, temp2, maxsize);
                        }
                        break;
                case 'P':
@@ -303,7 +304,7 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
                                udev_init_device(&udev_parent, NULL, NULL);
                                /* lookup the name in the udev_db with the DEVPATH of the parent */
                                if (udev_db_get_device(&udev_parent, &class_dev_parent->path[strlen(sysfs_path)]) == 0) {
-                                       strfieldcatmax(string, udev_parent.name, maxsize);
+                                       strlcat(string, udev_parent.name, maxsize);
                                        dbg("substitute parent node name'%s'", udev_parent.name);
                                } else
                                        dbg("parent not found in database");
@@ -313,15 +314,16 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
                case 'N':
                        if (udev->tmp_node[0] == '\0') {
                                dbg("create temporary device node for callout");
-                               snprintf(udev->tmp_node, NAME_SIZE, "%s/.tmp-%u-%u", udev_root, major(udev->devt), minor(udev->devt));
-                               udev->tmp_node[NAME_SIZE] = '\0';
+                               snprintf(udev->tmp_node, sizeof(udev->tmp_node), "%s/.tmp-%u-%u",
+                                        udev_root, major(udev->devt), minor(udev->devt));
+                               udev->tmp_node[sizeof(udev->tmp_node)-1] = '\0';
                                udev_make_node(udev, udev->tmp_node, udev->devt, 0600, 0, 0);
                        }
-                       strfieldcatmax(string, udev->tmp_node, maxsize);
+                       strlcat(string, udev->tmp_node, maxsize);
                        dbg("substitute temporary device node name '%s'", udev->tmp_node);
                        break;
                case 'r':
-                       strfieldcatmax(string, udev_root, maxsize);
+                       strlcat(string, udev_root, maxsize);
                        dbg("substitute udev_root '%s'", udev_root);
                        break;
                default:
@@ -332,7 +334,7 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
                if (len > 0)
                        pos[len] = '\0';
 
-               strfieldcatmax(string, tail, maxsize);
+               strlcat(string, tail, maxsize);
        }
 }
 
@@ -344,11 +346,11 @@ static int execute_program(struct udevice *udev, const char *path, char *value,
        int fds[2];
        pid_t pid;
        char *pos;
-       char arg[PROGRAM_SIZE];
-       char *argv[(PROGRAM_SIZE / 2) + 1];
+       char arg[PATH_SIZE];
+       char *argv[(sizeof(arg) / 2) + 1];
        int i;
 
-       strfieldcpy(arg, path);
+       strlcpy(arg, path, sizeof(arg));
        i = 0;
        if (strchr(path, ' ')) {
                pos = arg;
@@ -516,14 +518,14 @@ static int match_sysfs_pairs(struct config_device *dev, struct sysfs_class_devic
 
 static int match_id(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
 {
-       char path[SYSFS_PATH_MAX];
+       char path[PATH_SIZE];
        char *temp;
 
        /* we have to have a sysfs device for ID to work */
        if (!sysfs_device)
                return -ENODEV;
 
-       strfieldcpy(path, sysfs_device->path);
+       strlcpy(path, sysfs_device->path, sizeof(path));
        temp = strrchr(path, '/');
        temp++;
        dbg("search '%s' in '%s', path='%s'", dev->id, temp, path);
@@ -535,14 +537,14 @@ static int match_id(struct config_device *dev, struct sysfs_class_device *class_
 
 static int match_place(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
 {
-       char path[SYSFS_PATH_MAX];
+       char path[PATH_SIZE];
        char *temp;
 
        /* we have to have a sysfs device for PLACE to work */
        if (!sysfs_device)
                return -ENODEV;
 
-       strfieldcpy(path, sysfs_device->path);
+       strlcpy(path, sysfs_device->path, sizeof(path));
        temp = strrchr(path, '/');
        dbg("search '%s' in '%s', path='%s'", dev->place, temp, path);
        if (strstr(temp, dev->place) != NULL)
@@ -653,12 +655,12 @@ try_parent:
 
        /* execute external program */
        if (dev->program[0] != '\0') {
-               char program[PROGRAM_SIZE];
+               char program[PATH_SIZE];
 
                dbg("check " FIELD_PROGRAM);
-               strfieldcpy(program, dev->program);
+               strlcpy(program, dev->program, sizeof(program));
                apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
-               if (execute_program(udev, program, udev->program_result, NAME_SIZE) != 0) {
+               if (execute_program(udev, program, udev->program_result, sizeof(udev->program_result)) != 0) {
                        dbg(FIELD_PROGRAM " returned nonzero");
                        goto try_parent;
                }
@@ -707,7 +709,7 @@ int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_d
        if (sysfs_device) {
                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);
+               strlcpy(udev->bus_id, sysfs_device->bus_id, sizeof(udev->bus_id));
        }
 
        dbg("udev->kernel_name='%s'", udev->kernel_name);
@@ -739,24 +741,24 @@ int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_d
                                dbg("applied mode=%#o to '%s'", udev->mode, udev->kernel_name);
                        }
                        if (dev->owner[0] != '\0') {
-                               strfieldcpy(udev->owner, dev->owner);
+                               strlcpy(udev->owner, dev->owner, sizeof(udev->owner));
                                apply_format(udev, udev->owner, sizeof(udev->owner), class_dev, sysfs_device);
                                dbg("applied owner='%s' to '%s'", udev->owner, udev->kernel_name);
                        }
                        if (dev->group[0] != '\0') {
-                               strfieldcpy(udev->group, dev->group);
+                               strlcpy(udev->group, dev->group, sizeof(udev->group));
                                apply_format(udev, udev->group, sizeof(udev->group), class_dev, sysfs_device);
                                dbg("applied group='%s' to '%s'", udev->group, udev->kernel_name);
                        }
 
                        /* collect symlinks */
                        if (dev->symlink[0] != '\0') {
-                               char temp[NAME_SIZE];
+                               char temp[PATH_SIZE];
                                char *pos, *next;
 
                                info("configured rule in '%s[%i]' applied, added symlink '%s'",
                                     dev->config_file, dev->config_line, dev->symlink);
-                               strfieldcpy(temp, dev->symlink);
+                               strlcpy(temp, dev->symlink, sizeof(temp));
                                apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device);
 
                                /* add multiple symlinks separated by spaces */
@@ -778,9 +780,9 @@ int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_d
                                info("configured rule in '%s[%i]' applied, '%s' becomes '%s'",
                                     dev->config_file, dev->config_line, udev->kernel_name, dev->name);
 
-                               strfieldcpy(udev->name, dev->name);
+                               strlcpy(udev->name, dev->name, sizeof(udev->name));
                                apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device);
-                               strfieldcpy(udev->config_file, dev->config_file);
+                               strlcpy(udev->config_file, dev->config_file, sizeof(udev->config_file));
                                udev->config_line = dev->config_line;
 
                                if (udev->type != NET)
@@ -794,7 +796,7 @@ int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_d
 
        if (udev->name[0] == '\0') {
                /* no rule matched, so we use the kernel name */
-               strfieldcpy(udev->name, udev->kernel_name);
+               strlcpy(udev->name, udev->kernel_name, sizeof(udev->name));
                dbg("no rule found, use kernel name '%s'", udev->name);
        }