/* 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 <cutils/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 (property_set(name, value)) error_msg("failed to set property '%s' to '%s'", name, value); }