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/* setprop.c - Set an Android system property
*
* Copyright 2015 The Android Open Source Project
USE_SETPROP(NEWTOY(setprop, "<2>2", TOYFLAG_USR|TOYFLAG_SBIN))
config SETPROP
bool "setprop"
default y
depends on TOYBOX_ON_ANDROID
help
usage: setprop NAME VALUE
Sets an Android system property.
*/
#define FOR_setprop
#include "toys.h"
#include <sys/system_properties.h>
void setprop_main(void)
{
char *name = toys.optargs[0], *value = toys.optargs[1];
char *p;
size_t name_len = strlen(name), value_len = strlen(value);
// property_set doesn't tell us why it failed, and actually can't
// recognize most failures (because it doesn't wait for init), so
// we duplicate all of init's checks here to help the user.
if (name_len >= PROP_NAME_MAX)
error_exit("name '%s' too long; try '%.*s'",
name, PROP_NAME_MAX - 1, name);
if (value_len >= PROP_VALUE_MAX)
error_exit("value '%s' too long; try '%.*s'",
value, PROP_VALUE_MAX - 1, value);
if (*name == '.' || name[name_len - 1] == '.')
error_exit("property names must not start or end with '.'");
if (strstr(name, ".."))
error_exit("'..' is not allowed in a property name");
for (p = name; *p; ++p)
if (!isalnum(*p) && !strchr("@_.-", *p))
error_exit("invalid character '%c' in name '%s'", *p, name);
if (__system_property_set(name, value))
error_msg("failed to set property '%s' to '%s'", name, value);
}
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