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libsystemd: sd-device - translate / vs. ! in sysname

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The kernel replaces '/' in device names with '!', we translate that back
to '/' in sysname, when taking sysname as input, we should translate it
back again.
This commit is contained in:
Kay Sievers 2015-10-06 00:41:32 +02:00
parent f4e5a03ed7
commit a9ec9f2942
1 changed files with 15 additions and 3 deletions
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18
src/libsystemd/sd-device/sd-device.c
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@ -295,15 +295,27 @@ _public_ int sd_device_new_from_subsystem_sysname(sd_device **ret, const char *s
} else
return -EINVAL;
} else {
syspath = strjoina("/sys/subsystem/", subsystem, "/devices/", sysname);
char *name;
size_t len = 0;
/* translate sysname back to sysfs filename */
name = strdupa(sysname);
while (name[len] != '\0') {
if (name[len] == '/')
name[len] = '!';
len ++;
}
syspath = strjoina("/sys/subsystem/", subsystem, "/devices/", name);
if (access(syspath, F_OK) >= 0)
return sd_device_new_from_syspath(ret, syspath);
syspath = strjoina("/sys/bus/", subsystem, "/devices/", sysname);
syspath = strjoina("/sys/bus/", subsystem, "/devices/", name);
if (access(syspath, F_OK) >= 0)
return sd_device_new_from_syspath(ret, syspath);
syspath = strjoina("/sys/class/", subsystem, "/", sysname);
syspath = strjoina("/sys/class/", subsystem, "/", name);
if (access(syspath, F_OK) >= 0)
return sd_device_new_from_syspath(ret, syspath);
}