X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fudev%2Fudev-builtin-usb_id.c;h=06d4191584c48096d5a6b07c680217de42c36164;hb=73ae2b7dade339c8a258dcf4fa2b302e238117e1;hp=6481b35ae79ffc968003eccef17df88f74daf5c7;hpb=baa30fbc2c04b23209d0b8fb3c86cd15ef9ea81a;p=elogind.git

diff --git a/src/udev/udev-builtin-usb_id.c b/src/udev/udev-builtin-usb_id.c
index 6481b35ae..06d419158 100644
--- a/src/udev/udev-builtin-usb_id.c
+++ b/src/udev/udev-builtin-usb_id.c
@@ -4,7 +4,7 @@
  * Copyright (c) 2005 SUSE Linux Products GmbH, Germany
  *   Author: Hannes Reinecke <hare@suse.de>
  *
- * Copyright (C) 2005-2011 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2005-2011 Kay Sievers <kay@vrfy.org>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -31,9 +31,8 @@
 
 #include "udev.h"
 
-static void set_usb_iftype(char *to, int if_class_num, size_t len)
-{
-        char *type = "generic";
+static void set_usb_iftype(char *to, int if_class_num, size_t len) {
+        const char *type = "generic";
 
         switch (if_class_num) {
         case 1:
@@ -82,15 +81,17 @@ static void set_usb_iftype(char *to, int if_class_num, size_t len)
         to[len-1] = '\0';
 }
 
-static int set_usb_mass_storage_ifsubtype(char *to, const char *from, size_t len)
-{
+static int set_usb_mass_storage_ifsubtype(char *to, const char *from, size_t len) {
         int type_num = 0;
         char *eptr;
-        char *type = "generic";
+        const char *type = "generic";
 
         type_num = strtoul(from, &eptr, 0);
         if (eptr != from) {
                 switch (type_num) {
+                case 1: /* RBC devices */
+                        type = "rbc";
+                        break;
                 case 2:
                         type = "atapi";
                         break;
@@ -98,12 +99,8 @@ static int set_usb_mass_storage_ifsubtype(char *to, const char *from, size_t len
                         type = "tape";
                         break;
                 case 4: /* UFI */
-                case 5: /* SFF-8070i */
                         type = "floppy";
                         break;
-                case 1: /* RBC devices */
-                        type = "rbc";
-                        break;
                 case 6: /* Transparent SPC-2 devices */
                         type = "scsi";
                         break;
@@ -111,15 +108,14 @@ static int set_usb_mass_storage_ifsubtype(char *to, const char *from, size_t len
                         break;
                 }
         }
-        util_strscpy(to, len, type);
+        strscpy(to, len, type);
         return type_num;
 }
 
-static void set_scsi_type(char *to, const char *from, size_t len)
-{
+static void set_scsi_type(char *to, const char *from, size_t len) {
         int type_num;
         char *eptr;
-        char *type = "generic";
+        const char *type = "generic";
 
         type_num = strtoul(from, &eptr, 0);
         if (eptr != from) {
@@ -143,19 +139,19 @@ static void set_scsi_type(char *to, const char *from, size_t len)
                         break;
                 }
         }
-        util_strscpy(to, len, type);
+        strscpy(to, len, type);
 }
 
 #define USB_DT_DEVICE                        0x01
 #define USB_DT_INTERFACE                0x04
 
-static int dev_if_packed_info(struct udev_device *dev, char *ifs_str, size_t len)
-{
-        char *filename = NULL;
-        int fd;
+static int dev_if_packed_info(struct udev_device *dev, char *ifs_str, size_t len) {
+        _cleanup_free_ char *filename = NULL;
+        _cleanup_close_ int fd = -1;
         ssize_t size;
         unsigned char buf[18 + 65535];
-        unsigned int pos, strpos;
+        int pos = 0;
+        unsigned strpos = 0;
         struct usb_interface_descriptor {
                 u_int8_t        bLength;
                 u_int8_t        bDescriptorType;
@@ -167,29 +163,22 @@ static int dev_if_packed_info(struct udev_device *dev, char *ifs_str, size_t len
                 u_int8_t        bInterfaceProtocol;
                 u_int8_t        iInterface;
         } __attribute__((packed));
-        int err = 0;
 
-        if (asprintf(&filename, "%s/descriptors", udev_device_get_syspath(dev)) < 0) {
-                err = -1;
-                goto out;
-        }
+        if (asprintf(&filename, "%s/descriptors", udev_device_get_syspath(dev)) < 0)
+                return log_oom();
+
         fd = open(filename, O_RDONLY|O_CLOEXEC);
         if (fd < 0) {
                 fprintf(stderr, "error opening USB device 'descriptors' file\n");
-                err = -1;
-                goto out;
+                return -errno;
         }
+
         size = read(fd, buf, sizeof(buf));
-        close(fd);
-        if (size < 18 || size == sizeof(buf)) {
-                err = -1;
-                goto out;
-        }
+        if (size < 18 || size == sizeof(buf))
+                return -EIO;
 
-        pos = 0;
-        strpos = 0;
         ifs_str[0] = '\0';
-        while (pos < sizeof(buf) && strpos+7 < len-2) {
+        while (pos < size && strpos+7 < len-2) {
                 struct usb_interface_descriptor *desc;
                 char if_str[8];
 
@@ -213,22 +202,22 @@ static int dev_if_packed_info(struct udev_device *dev, char *ifs_str, size_t len
                 memcpy(&ifs_str[strpos], if_str, 8),
                 strpos += 7;
         }
+
         if (strpos > 0) {
                 ifs_str[strpos++] = ':';
                 ifs_str[strpos++] = '\0';
         }
-out:
-        free(filename);
-        return err;
+
+        return 0;
 }
 
 /*
  * A unique USB identification is generated like this:
  *
  * 1.) Get the USB device type from InterfaceClass and InterfaceSubClass
- * 2.) If the device type is 'Mass-Storage/SPC-2' or 'Mass-Storage/RBC'
+ * 2.) If the device type is 'Mass-Storage/SPC-2' or 'Mass-Storage/RBC',
  *     use the SCSI vendor and model as USB-Vendor and USB-model.
- * 3.) Otherwise use the USB manufacturer and product as
+ * 3.) Otherwise, use the USB manufacturer and product as
  *     USB-Vendor and USB-model. Any non-printable characters
  *     in those strings will be skipped; a slash '/' will be converted
  *     into a full stop '.'.
@@ -239,8 +228,7 @@ out:
  * 6.) If the device supplies a serial number, this number
  *     is concatenated with the identification with an underscore '_'.
  */
-static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool test)
-{
+static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool test) {
         char vendor_str[64];
         char vendor_str_enc[256];
         const char *vendor_id;
@@ -256,7 +244,6 @@ static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool
         const char *driver = NULL;
         char serial[256];
 
-        struct udev *udev = udev_device_get_udev(dev);
         struct udev_device *dev_interface = NULL;
         struct udev_device *dev_usb = NULL;
         const char *if_class, *if_subclass;
@@ -274,7 +261,7 @@ static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool
         instance_str[0] = '\0';
 
         /* shortcut, if we are called directly for a "usb_device" type */
-        if (udev_device_get_devtype(dev) != NULL && strcmp(udev_device_get_devtype(dev), "usb_device") == 0) {
+        if (udev_device_get_devtype(dev) != NULL && streq(udev_device_get_devtype(dev), "usb_device")) {
                 dev_if_packed_info(dev, packed_if_str, sizeof(packed_if_str));
                 dev_usb = dev;
                 goto fallback;
@@ -283,7 +270,7 @@ static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool
         /* usb interface directory */
         dev_interface = udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_interface");
         if (dev_interface == NULL) {
-                log_debug("unable to access usb_interface device of '%s'\n",
+                log_debug("unable to access usb_interface device of '%s'",
                      udev_device_get_syspath(dev));
                 return EXIT_FAILURE;
         }
@@ -293,7 +280,7 @@ static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool
 
         if_class = udev_device_get_sysattr_value(dev_interface, "bInterfaceClass");
         if (!if_class) {
-                log_debug("%s: cannot get bInterfaceClass attribute\n",
+                log_debug("%s: cannot get bInterfaceClass attribute",
                      udev_device_get_sysname(dev));
                 return EXIT_FAILURE;
         }
@@ -308,13 +295,13 @@ static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool
                 set_usb_iftype(type_str, if_class_num, sizeof(type_str)-1);
         }
 
-        log_debug("%s: if_class %d protocol %d\n",
+        log_debug("%s: if_class %d protocol %d",
              udev_device_get_syspath(dev_interface), if_class_num, protocol);
 
         /* usb device directory */
         dev_usb = udev_device_get_parent_with_subsystem_devtype(dev_interface, "usb", "usb_device");
         if (!dev_usb) {
-                log_debug("unable to find parent 'usb' device of '%s'\n",
+                log_debug("unable to find parent 'usb' device of '%s'",
                      udev_device_get_syspath(dev));
                 return EXIT_FAILURE;
         }
@@ -331,19 +318,19 @@ static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool
                 /* get scsi device */
                 dev_scsi = udev_device_get_parent_with_subsystem_devtype(dev, "scsi", "scsi_device");
                 if (dev_scsi == NULL) {
-                        log_debug("unable to find parent 'scsi' device of '%s'\n",
+                        log_debug("unable to find parent 'scsi' device of '%s'",
                              udev_device_get_syspath(dev));
                         goto fallback;
                 }
                 if (sscanf(udev_device_get_sysname(dev_scsi), "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4) {
-                        log_debug("invalid scsi device '%s'\n", udev_device_get_sysname(dev_scsi));
+                        log_debug("invalid scsi device '%s'", udev_device_get_sysname(dev_scsi));
                         goto fallback;
                 }
 
                 /* Generic SPC-2 device */
                 scsi_vendor = udev_device_get_sysattr_value(dev_scsi, "vendor");
                 if (!scsi_vendor) {
-                        log_debug("%s: cannot get SCSI vendor attribute\n",
+                        log_debug("%s: cannot get SCSI vendor attribute",
                              udev_device_get_sysname(dev_scsi));
                         goto fallback;
                 }
@@ -353,7 +340,7 @@ static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool
 
                 scsi_model = udev_device_get_sysattr_value(dev_scsi, "model");
                 if (!scsi_model) {
-                        log_debug("%s: cannot get SCSI model attribute\n",
+                        log_debug("%s: cannot get SCSI model attribute",
                              udev_device_get_sysname(dev_scsi));
                         goto fallback;
                 }
@@ -363,7 +350,7 @@ static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool
 
                 scsi_type = udev_device_get_sysattr_value(dev_scsi, "type");
                 if (!scsi_type) {
-                        log_debug("%s: cannot get SCSI type attribute\n",
+                        log_debug("%s: cannot get SCSI type attribute",
                              udev_device_get_sysname(dev_scsi));
                         goto fallback;
                 }
@@ -371,7 +358,7 @@ static int builtin_usb_id(struct udev_device *dev, int argc, char *argv[], bool
 
                 scsi_rev = udev_device_get_sysattr_value(dev_scsi, "rev");
                 if (!scsi_rev) {
-                        log_debug("%s: cannot get SCSI revision attribute\n",
+                        log_debug("%s: cannot get SCSI revision attribute",
                              udev_device_get_sysname(dev_scsi));
                         goto fallback;
                 }
@@ -397,7 +384,7 @@ fallback:
                 if (!usb_vendor)
                         usb_vendor = vendor_id;
                 if (!usb_vendor) {
-                        log_debug("No USB vendor information available\n");
+                        log_debug("No USB vendor information available");
                         return EXIT_FAILURE;
                 }
                 udev_util_encode_string(usb_vendor, vendor_str_enc, sizeof(vendor_str_enc));
@@ -432,6 +419,17 @@ fallback:
                 const char *usb_serial;
 
                 usb_serial = udev_device_get_sysattr_value(dev_usb, "serial");
+                if (usb_serial) {
+                        const unsigned char *p;
+
+                        /* http://msdn.microsoft.com/en-us/library/windows/hardware/gg487321.aspx */
+                        for (p = (unsigned char *)usb_serial; *p != '\0'; p++)
+                                if (*p < 0x20 || *p > 0x7f || *p == ',') {
+                                        usb_serial = NULL;
+                                        break;
+                                }
+                }
+
                 if (usb_serial) {
                         util_replace_whitespace(usb_serial, serial_str, sizeof(serial_str)-1);
                         util_replace_chars(serial_str, NULL);
@@ -439,12 +437,12 @@ fallback:
         }
 
         s = serial;
-        l = util_strpcpyl(&s, sizeof(serial), vendor_str, "_", model_str, NULL);
+        l = strpcpyl(&s, sizeof(serial), vendor_str, "_", model_str, NULL);
         if (serial_str[0] != '\0')
-                l = util_strpcpyl(&s, l, "_", serial_str, NULL);
+                l = strpcpyl(&s, l, "_", serial_str, NULL);
 
         if (instance_str[0] != '\0')
-                util_strpcpyl(&s, l, "-", instance_str, NULL);
+                strpcpyl(&s, l, "-", instance_str, NULL);
 
         udev_builtin_add_property(dev, test, "ID_VENDOR", vendor_str);
         udev_builtin_add_property(dev, test, "ID_VENDOR_ENC", vendor_str_enc);