diff options
Diffstat (limited to 'src/libsystemd/sd-device/sd-device.c')
| -rw-r--r-- | src/libsystemd/sd-device/sd-device.c | 39 |
1 files changed, 20 insertions, 19 deletions
diff --git a/src/libsystemd/sd-device/sd-device.c b/src/libsystemd/sd-device/sd-device.c index 3179d16b21..0dd0e14eef 100644 --- a/src/libsystemd/sd-device/sd-device.c +++ b/src/libsystemd/sd-device/sd-device.c @@ -1593,9 +1593,9 @@ _public_ int sd_device_get_property_value(sd_device *device, const char *key, co } /* replaces the value if it already exists */ -static int device_add_sysattr_value(sd_device *device, const char *_key, const char *_value) { +static int device_add_sysattr_value(sd_device *device, const char *_key, char *value) { _cleanup_free_ char *key = NULL; - _cleanup_free_ char *value = NULL; + _cleanup_free_ char *value_old = NULL; int r; assert(device); @@ -1605,28 +1605,18 @@ static int device_add_sysattr_value(sd_device *device, const char *_key, const c if (r < 0) return r; - value = hashmap_remove2(device->sysattr_values, _key, (void **)&key); + value_old = hashmap_remove2(device->sysattr_values, _key, (void **)&key); if (!key) { key = strdup(_key); if (!key) return -ENOMEM; } - free(value); - value = NULL; - - if (_value) { - value = strdup(_value); - if (!value) - return -ENOMEM; - } - r = hashmap_put(device->sysattr_values, key, value); if (r < 0) return r; key = NULL; - value = NULL; return 0; } @@ -1740,8 +1730,9 @@ static void device_remove_sysattr_value(sd_device *device, const char *_key) { /* set the attribute and save it in the cache. If a NULL value is passed the * attribute is cleared from the cache */ -_public_ int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, char *value) { +_public_ int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, char *_value) { _cleanup_close_ int fd = -1; + _cleanup_free_ char *value = NULL; const char *syspath; char *path; struct stat statbuf; @@ -1752,7 +1743,7 @@ _public_ int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, assert_return(device, -EINVAL); assert_return(sysattr, -EINVAL); - if (!value) { + if (!_value) { device_remove_sysattr_value(device, sysattr); return 0; @@ -1765,7 +1756,11 @@ _public_ int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, path = strjoina(syspath, "/", sysattr); r = lstat(path, &statbuf); if (r < 0) { - r = device_add_sysattr_value(device, sysattr, ""); + value = strdup(""); + if (!value) + return -ENOMEM; + + r = device_add_sysattr_value(device, sysattr, value); if (r < 0) return r; @@ -1783,11 +1778,11 @@ _public_ int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, if ((statbuf.st_mode & S_IRUSR) == 0) return -EACCES; - value_len = strlen(value); + value_len = strlen(_value); /* drop trailing newlines */ - while (value_len > 0 && value[--value_len] == '\n') - value[value_len] = '\0'; + while (value_len > 0 && _value[--value_len] == '\n') + _value[value_len] = '\0'; /* value length is limited to 4k */ if (value_len > 4096) @@ -1797,6 +1792,10 @@ _public_ int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, if (fd < 0) return -errno; + value = strdup(_value); + if (!value) + return -ENOMEM; + size = write(fd, value, value_len); if (size < 0) return -errno; @@ -1808,5 +1807,7 @@ _public_ int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, if (r < 0) return r; + value = NULL; + return 0; } |