110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <Eeze_Udev.h>
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#include "eeze_udev_private.h"
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extern _udev *udev;
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/**
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* Walks up the device chain starting at @p syspath,
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* checking each device for @p sysattr with (optional) @p value.
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*
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* @param syspath The /sys/ path of the device to start at, with or without the /sys/
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* @param sysattr The attribute to find
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* @param value OPTIONAL: The value that @p sysattr should have, or NULL
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*
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* @return If the sysattr (with value) is found, returns TRUE. Else, false.
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*/
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EAPI Eina_Bool
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eeze_udev_walk_check_sysattr(const char *syspath, const char *sysattr,
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const char *value)
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{
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_udev_device *device, *child, *parent;
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Eina_Strbuf *sbuf;
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const char *test = NULL;
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if (!udev)
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return 0;
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sbuf = eina_strbuf_new();
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if (!strstr(syspath, "/sys/"))
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eina_strbuf_append(sbuf, "/sys/");
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eina_strbuf_append(sbuf, syspath);
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device = udev_device_new_from_syspath(udev, eina_strbuf_string_get(sbuf));
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for (parent = device; parent;
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child = parent, parent = udev_device_get_parent(child))
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{
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if ((test = udev_device_get_sysattr_value(parent, sysattr)))
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{
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if (value)
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{
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if (!strcmp(test, value))
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{
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eina_strbuf_free(sbuf);
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udev_device_unref(device);
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return 1;
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}
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}
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else
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{
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eina_strbuf_free(sbuf);
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udev_device_unref(device);
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return 1;
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}
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}
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}
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eina_strbuf_free(sbuf);
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udev_device_unref(device);
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return 0;
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}
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/**
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* Walks up the device chain starting at @p syspath,
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* checking each device for @p sysattr, and returns the value if found.
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*
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* @param syspath The /sys/ path of the device to start at, with or without the /sys/
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* @param sysattr The attribute to find
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*
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* @return The value of @p sysattr if found, or NULL
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*/
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EAPI const char *
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eeze_udev_walk_get_sysattr(const char *syspath, const char *sysattr)
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{
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_udev_device *device, *child, *parent;
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Eina_Strbuf *sbuf;
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const char *test = NULL;
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if (!syspath)
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return NULL;
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sbuf = eina_strbuf_new();
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if (!strstr(syspath, "/sys/"))
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eina_strbuf_append(sbuf, "/sys/");
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eina_strbuf_append(sbuf, syspath);
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device = udev_device_new_from_syspath(udev, eina_strbuf_string_get(sbuf));
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for (parent = device; parent;
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child = parent, parent = udev_device_get_parent(child))
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{
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if ((test = udev_device_get_sysattr_value(parent, sysattr)))
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{
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eina_strbuf_free(sbuf);
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test = eina_stringshare_add(test);
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udev_device_unref(device);
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return test;
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}
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}
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eina_strbuf_free(sbuf);
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udev_device_unref(device);
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return NULL;
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}
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