1 /* setprop.c - Set an Android system property 2 * 3 * Copyright 2015 The Android Open Source Project 4 5 USE_SETPROP(NEWTOY(setprop, "<2>2", TOYFLAG_USR|TOYFLAG_SBIN)) 6 7 config SETPROP 8 bool "setprop" 9 default y 10 depends on TOYBOX_ON_ANDROID 11 help 12 usage: setprop NAME VALUE 13 14 Sets an Android system property. 15 */ 16 17 #define FOR_setprop 18 #include "toys.h" 19 20 #include <sys/system_properties.h> 21 22 void setprop_main(void) 23 { 24 char *name = toys.optargs[0], *value = toys.optargs[1]; 25 char *p; 26 size_t name_len = strlen(name), value_len = strlen(value); 27 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. 31 32 if (value_len >= PROP_VALUE_MAX && !strncmp(value, "ro.", 3)) 33 error_exit("value '%s' too long; try '%.*s'", 34 value, PROP_VALUE_MAX - 1, value); 35 36 if (*name == '.' || name[name_len - 1] == '.') 37 error_exit("property names must not start or end with '.'"); 38 if (strstr(name, "..")) 39 error_exit("'..' is not allowed in a property name"); 40 for (p = name; *p; ++p) 41 if (!isalnum(*p) && !strchr(":@_.-", *p)) 42 error_exit("invalid character '%c' in name '%s'", *p, name); 43 44 if (__system_property_set(name, value)) 45 error_msg("failed to set property '%s' to '%s'", name, value); 46 } 47
