467 lines
12 KiB
C
467 lines
12 KiB
C
#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <Ecore.h>
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#include <Eeze.h>
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#include <Eeze_Disk.h>
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#include "eeze_udev_private.h"
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#include "eeze_disk_private.h"
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/**
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* @addtogroup disk Disk
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* @{
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*/
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static Eeze_Disk_Type
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_eeze_disk_type_find(Eeze_Disk *disk)
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{
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const char *bus;
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bus = udev_device_get_property_value(disk->device, "ID_BUS");
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if (!bus)
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return EEZE_DISK_TYPE_UNKNOWN;
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if (!strcmp(bus, "ata") || !strcmp(bus, "scsi"))
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{ /* FIXME: I think some other types of devices fall into this, check later */
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if (udev_device_get_property_value(disk->device, "ID_CDROM"))
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return EEZE_DISK_TYPE_CDROM;
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else
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return EEZE_DISK_TYPE_INTERNAL;
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}
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else if (!strcmp(bus, "usb"))
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return EEZE_DISK_TYPE_USB;
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return EEZE_DISK_TYPE_UNKNOWN;
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}
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static _udev_device *
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_eeze_disk_device_from_property(const char *prop, Eina_Bool uuid)
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{
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_udev_enumerate *en;
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_udev_list_entry *devs, *cur;
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_udev_device *device;
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const char *devname;
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en = udev_enumerate_new(udev);
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if (!en)
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return NULL;
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if (uuid)
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udev_enumerate_add_match_property(en, "ID_FS_UUID", prop);
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else
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udev_enumerate_add_match_property(en, "ID_FS_LABEL", prop);
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udev_enumerate_scan_devices(en);
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devs = udev_enumerate_get_list_entry(en);
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udev_list_entry_foreach(cur, devs)
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{
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devname = udev_list_entry_get_name(cur);
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device = udev_device_new_from_syspath(udev, devname);
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break;
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}
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udev_enumerate_unref(en);
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return device;
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}
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/**
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* @brief Use this function to determine whether your eeze is disk-capable
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*
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* Since applications will die if they run against a function that doesn't exist,
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* if your application successfully runs this function then you have eeze_disk.
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*/
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EAPI void
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eeze_disk_function(void)
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{
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}
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/**
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* @brief Create a new disk object from a /sys/ path or /dev/ path
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* @param path The /sys/ or /dev path of the disk; CANNOT be #NULL
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* @return The new disk object
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*
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* This function creates a new #Eeze_Disk from @p path. Note that this function
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* does the minimal amount of work in order to save memory, and udev info about the disk
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* is not retrieved in this call.
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*/
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EAPI Eeze_Disk *
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eeze_disk_new(const char *path)
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{
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Eeze_Disk *disk;
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_udev_device *dev;
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const char *syspath;
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Eina_Bool is_dev = EINA_FALSE;
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EINA_SAFETY_ON_NULL_RETURN_VAL(path, NULL);
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if (!strncmp(path, "/dev/", 5))
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{
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is_dev = EINA_TRUE;
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syspath = eeze_udev_devpath_get_syspath(path);
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if (!syspath)
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return NULL;
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if (!(dev = _new_device(syspath)))
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{
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eina_stringshare_del(syspath);
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return NULL;
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}
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}
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else if (!(dev = _new_device(path)))
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return NULL;
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if (!(disk = calloc(1, sizeof(Eeze_Disk))))
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return NULL;
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if (is_dev)
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{
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disk->devpath = eina_stringshare_add(path);
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disk->syspath = syspath;
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}
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else
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disk->syspath = eina_stringshare_add(udev_device_get_syspath(dev));
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disk->device = dev;
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disk->mount_cmd_changed = EINA_TRUE;
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disk->unmount_cmd_changed = EINA_TRUE;
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return disk;
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}
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/**
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* @brief Create a new disk object from a mount point
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* @param mount_point The mount point of the disk; CANNOT be #NULL
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* @return The new disk object
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*
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* This function creates a new #Eeze_Disk from @p mount_point. Note that this function
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* does the minimal amount of work in order to save memory, and udev info about the disk
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* is not retrieved in this call. If the disk is not currently mounted, it must have an entry
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* in /etc/fstab.
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*/
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EAPI Eeze_Disk *
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eeze_disk_new_from_mount(const char *mount_point)
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{
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Eeze_Disk *disk = NULL;
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_udev_device *dev = NULL;
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const char *syspath = NULL, *source, *uuid = NULL, *label = NULL, *devpath = NULL;
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EINA_SAFETY_ON_NULL_RETURN_VAL(mount_point, NULL);
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if (!(source = eeze_disk_libmount_mp_find_source(mount_point)))
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return NULL;
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if (source[4] == '=')
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{
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source += 4;
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uuid = eina_stringshare_add(source);
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dev = _eeze_disk_device_from_property(uuid, EINA_TRUE);
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}
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else if (source[5] == '=')
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{
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source += 5;
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label = eina_stringshare_add(source);
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dev = _eeze_disk_device_from_property(label, EINA_FALSE);
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}
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else
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{
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devpath = eina_stringshare_add(source);
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dev = _new_device(devpath);
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}
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if (!dev)
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goto error;
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if (!(disk = calloc(1, sizeof(Eeze_Disk))))
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goto error;
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disk->syspath = udev_device_get_syspath(dev);
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disk->device = dev;
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disk->mount_cmd_changed = EINA_TRUE;
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disk->unmount_cmd_changed = EINA_TRUE;
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if (uuid)
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disk->cache.uuid = uuid;
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else if (label)
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disk->cache.label = label;
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else
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disk->devpath = devpath;
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return disk;
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error:
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if (uuid)
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eina_stringshare_del(uuid);
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else if (label)
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eina_stringshare_del(label);
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else if (devpath)
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eina_stringshare_del(devpath);
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if (syspath)
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eina_stringshare_del(syspath);
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if (dev)
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udev_device_unref(dev);
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return NULL;
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}
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/**
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* @brief Frees a disk object
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* @param disk The disk object to free
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*
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* This call frees an #Eeze_Disk. Once freed, the disk can no longer be used.
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*/
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EAPI void
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eeze_disk_free(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN(disk);
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eina_stringshare_del(disk->syspath);
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udev_device_unref(disk->device);
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if (disk->mount_cmd)
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eina_strbuf_free(disk->mount_cmd);
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if (disk->unmount_cmd)
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eina_strbuf_free(disk->unmount_cmd);
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free(disk);
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}
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/**
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* @brief Retrieve all disk information
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* @param disk
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*
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* Use this function to retrieve all of a disk's information at once, then use
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* a "get" function to retrieve the value. Data retrieved in this call is cached,
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* meaning that subsequent calls will return immediately without performing any work.
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*/
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EAPI void
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eeze_disk_scan(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN(disk);
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/* never rescan; if these values change then something is seriously wrong */
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if (disk->cache.filled) return;
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if (!disk->cache.vendor)
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disk->cache.vendor = udev_device_get_property_value(disk->device, "ID_VENDOR");
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if (!disk->cache.model)
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disk->cache.model = udev_device_get_property_value(disk->device, "ID_MODEL");
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if (!disk->cache.serial)
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disk->cache.serial = udev_device_get_property_value(disk->device, "ID_SERIAL_SHORT");
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if (!disk->cache.uuid)
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disk->cache.uuid = udev_device_get_property_value(disk->device, "ID_FS_UUID");
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if (!disk->cache.type)
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disk->cache.type = _eeze_disk_type_find(disk);
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if (!disk->cache.label)
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disk->cache.label = udev_device_get_property_value(disk->device, "ID_FS_LABEL");
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disk->cache.removable = !!strtol(udev_device_get_sysattr_value(disk->device, "removable"), NULL, 10);
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disk->cache.filled = EINA_TRUE;
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}
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/**
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* @brief Associate data with a disk
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* @param disk The disk
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* @param data The data
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*
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* Data can be associated with @p disk with this function.
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* @see eeze_disk_data_get
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*/
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EAPI void
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eeze_disk_data_set(Eeze_Disk *disk, void *data)
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{
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EINA_SAFETY_ON_NULL_RETURN(disk);
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disk->data = data;
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}
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/**
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* @brief Retrieve data previously associated with a disk
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* @param disk The disk
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* @return The data
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*
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* Data that has been previously associated with @p disk
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* is returned with this function.
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* @see eeze_disk_data_set
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*/
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EAPI void *
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eeze_disk_data_get(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(disk, NULL);
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return disk->data;
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}
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/**
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* @brief Return the /sys/ path of a disk
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* @param disk The disk
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* @return The /sys/ path
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*
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* This retrieves the /sys/ path that udev associates with @p disk.
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*/
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EAPI const char *
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eeze_disk_syspath_get(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(disk, NULL);
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return disk->syspath;
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}
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/**
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* @brief Return the /dev/ path of a disk
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* @param disk The disk
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* @return The /dev/ path
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*
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* This retrieves the /dev/ path that udev has created a device node at for @p disk.
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*/
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EAPI const char *
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eeze_disk_devpath_get(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(disk, NULL);
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if (disk->devpath)
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return disk->devpath;
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disk->devpath = udev_device_get_devnode(disk->device);
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return disk->devpath;
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}
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/**
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* @brief Return the filesystem of the disk (if known)
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* @param disk The disk
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* @return The filesystem type
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*
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* This retrieves the filesystem that the disk is using, or #NULL if unknown.
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*/
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EAPI const char *
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eeze_disk_fstype_get(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(disk, NULL);
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return disk->fstype;
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}
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/**
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* @brief Return the manufacturing vendor of the disk
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* @param disk The disk
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* @return The vendor
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*
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* This retrieves the vendor which manufactured the disk, or #NULL if unknown.
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*/
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EAPI const char *
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eeze_disk_vendor_get(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(disk, NULL);
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if (disk->cache.vendor)
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return disk->cache.vendor;
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disk->cache.vendor = udev_device_get_property_value(disk->device, "ID_VENDOR");
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return disk->cache.vendor;
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}
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/**
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* @brief Return the model of the disk
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* @param disk The disk
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* @return The model
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*
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* This retrieves the model of the disk, or #NULL if unknown.
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*/
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EAPI const char *
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eeze_disk_model_get(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(disk, NULL);
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if (disk->cache.model)
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return disk->cache.model;
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disk->cache.model = udev_device_get_property_value(disk->device, "ID_MODEL");
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return disk->cache.model;
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}
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/**
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* @brief Return the serial number of the disk
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* @param disk The disk
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* @return The serial number
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*
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* This retrieves the serial number the disk, or #NULL if unknown.
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*/
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EAPI const char *
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eeze_disk_serial_get(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(disk, NULL);
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if (disk->cache.serial)
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return disk->cache.serial;
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disk->cache.serial = udev_device_get_property_value(disk->device, "ID_SERIAL_SHORT");
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return disk->cache.serial;
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}
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/**
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* @brief Return the UUID of the disk
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* @param disk The disk
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* @return The UUID
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*
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* This retrieves the UUID of the disk, or #NULL if unknown.
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* A UUID is a 36 character (hopefully) unique identifier which can
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* be used to store persistent information about a disk.
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*/
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EAPI const char *
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eeze_disk_uuid_get(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(disk, NULL);
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if (disk->cache.uuid)
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return disk->cache.uuid;
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disk->cache.uuid = udev_device_get_property_value(disk->device, "ID_FS_UUID");
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return disk->cache.uuid;
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}
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/**
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* @brief Return the label of the disk
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* @param disk The disk
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* @return The label
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*
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* This retrieves the label (name) of the disk, or #NULL if unknown.
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*/
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EAPI const char *
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eeze_disk_label_get(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(disk, NULL);
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if (disk->cache.label)
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return disk->cache.label;
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disk->cache.label = udev_device_get_property_value(disk->device, "ID_FS_LABEL");
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return disk->cache.label;
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}
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/**
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* @brief Return the #Eeze_Disk_Type of the disk
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* @param disk The disk
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* @return The type
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*
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* This retrieves the #Eeze_Disk_Type of the disk. This call is useful for determining
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* the bus that the disk is connected through.
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*/
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EAPI Eeze_Disk_Type
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eeze_disk_type_get(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(disk, EEZE_DISK_TYPE_UNKNOWN);
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if (disk->cache.type)
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return disk->cache.type;
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disk->cache.type = _eeze_disk_type_find(disk);
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return disk->cache.type;
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}
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EAPI Eina_Bool
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eeze_disk_removable_get(Eeze_Disk *disk)
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{
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EINA_SAFETY_ON_NULL_RETURN_VAL(disk, EINA_FALSE);
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if (disk->cache.filled)
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return disk->cache.removable;
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disk->cache.removable = !!strtol(udev_device_get_sysattr_value(disk->device, "removable"), NULL, 10);
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return disk->cache.removable;
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}
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/** @} */
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