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 #if defined(__ANDROID__) 21 22 #include <cutils/properties.h> 23 24 void setprop_main(void) 25 { 26 char *name = toys.optargs[0], *value = toys.optargs[1]; 27 char *p; 28 size_t name_len = strlen(name), value_len = strlen(value); 29 30 // property_set doesn't tell us why it failed, and actually can't 31 // recognize most failures (because it doesn't wait for init), so 32 // we duplicate all of init's checks here to help the user. 33 34 if (name_len >= PROP_NAME_MAX) 35 error_exit("name '%s' too long; try '%.*s'", 36 name, PROP_NAME_MAX - 1, name); 37 if (value_len >= PROP_VALUE_MAX) 38 error_exit("value '%s' too long; try '%.*s'", 39 value, PROP_VALUE_MAX - 1, value); 40 41 if (*name == '.' || name[name_len - 1] == '.') 42 error_exit("property names must not start or end with '.'"); 43 if (strstr(name, "..")) 44 error_exit("'..' is not allowed in a property name"); 45 for (p = name; *p; ++p) 46 if (!isalnum(*p) && !strchr("_.-", *p)) 47 error_exit("invalid character '%c' in name '%s'", *p, name); 48 49 if (property_set(name, value)) 50 error_msg("failed to set property '%s' to '%s'", name, value); 51 } 52 53 #else 54 55 void setprop_main(void) 56 { 57 } 58 59 #endif 60
