kconfig: add helper to set config symbol from environment variable
Add conf_set_env_sym() that can set an already defined symbol based on the value of an environment variable. Unknown symbols are silently ignored. A warning is printed if the value of the environment variable is unexpected. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Roman Zippel <zippel@linux-m68k.org>
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9c900a9c9d
Коммит
0f855aa64b
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@ -145,6 +145,33 @@ static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
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return 0;
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}
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/* Read an environment variable and assign the value to the symbol */
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int conf_set_env_sym(const char *env, const char *symname, int def)
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{
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struct symbol *sym;
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char *p;
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int def_flags;
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p = getenv(env);
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if (p) {
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char warning[200];
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sprintf(warning, "Environment variable (%s = \"%s\")", env, p);
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conf_filename = warning;
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def_flags = SYMBOL_DEF << def;
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if (def == S_DEF_USER) {
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sym = sym_find(symname);
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if (!sym)
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return 1;
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} else {
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sym = sym_lookup(symname, 0);
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if (sym->type == S_UNKNOWN)
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sym->type = S_OTHER;
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}
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conf_set_sym_val(sym, def, def_flags, p);
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}
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return 0;
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}
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int conf_read_simple(const char *name, int def)
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{
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FILE *in = NULL;
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@ -1,6 +1,7 @@
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/* confdata.c */
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P(conf_parse,void,(const char *name));
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P(conf_set_env_sym,int,(const char *envname, const char *symname, int def));
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P(conf_read,int,(const char *name));
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P(conf_read_simple,int,(const char *name, int));
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P(conf_write,int,(const char *name));
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