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