1 /* setprop.c - Set an Android system property
3 * Copyright 2015 The Android Open Source Project
5 USE_SETPROP(NEWTOY(setprop, "<2>2", TOYFLAG_USR|TOYFLAG_SBIN))
10 depends on TOYBOX_ON_ANDROID
12 usage: setprop NAME VALUE
14 Sets an Android system property.
20 #include <cutils/properties.h>
22 void setprop_main(void)
24 char *name = toys.optargs[0], *value = toys.optargs[1];
26 size_t name_len = strlen(name), value_len = strlen(value);
28 // property_set doesn't tell us why it failed, and actually can't
29 // recognize most failures (because it doesn't wait for init), so
30 // we duplicate all of init's checks here to help the user.
32 if (name_len >= PROP_NAME_MAX)
33 error_exit("name '%s' too long; try '%.*s'",
34 name, PROP_NAME_MAX - 1, name);
35 if (value_len >= PROP_VALUE_MAX)
36 error_exit("value '%s' too long; try '%.*s'",
37 value, PROP_VALUE_MAX - 1, value);
39 if (*name == '.' || name[name_len - 1] == '.')
40 error_exit("property names must not start or end with '.'");
41 if (strstr(name, ".."))
42 error_exit("'..' is not allowed in a property name");
43 for (p = name; *p; ++p)
44 if (!isalnum(*p) && !strchr("_.-", *p))
45 error_exit("invalid character '%c' in name '%s'", *p, name);
47 if (property_set(name, value))
48 error_msg("failed to set property '%s' to '%s'", name, value);