135 lines
2.5 KiB
C
135 lines
2.5 KiB
C
#include <common.h>
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#include <command.h>
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#include <getopt.h>
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#include <environment.h>
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#include <magicvar.h>
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#include <malloc.h>
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static LIST_HEAD(magicvars);
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struct magicvar_dyn {
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char *name;
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char *description;
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struct list_head list;
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};
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static void magicvar_print_one(struct magicvar_dyn *md, int verbose)
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{
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printf("%-32s %s\n", md->name, md->description);
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if (verbose) {
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const char *val = getenv(md->name);
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if (val && strlen(val))
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printf(" %s\n", val);
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}
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}
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struct magicvar_dyn *magicvar_find(const char *name)
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{
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struct magicvar_dyn *md;
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list_for_each_entry(md, &magicvars, list)
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if (!strcmp(md->name, name))
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return md;
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return NULL;
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}
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static void magicvar_remove(struct magicvar_dyn *md)
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{
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free(md->name);
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free(md->description);
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list_del(&md->list);
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free(md);
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}
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static int compare(struct list_head *a, struct list_head *b)
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{
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char *na = (char*)list_entry(a, struct magicvar_dyn, list)->name;
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char *nb = (char*)list_entry(b, struct magicvar_dyn, list)->name;
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return strcmp(na, nb);
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}
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static int magicvar_add(const char *name, const char *description)
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{
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struct magicvar_dyn *md;
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md = magicvar_find(name);
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if (md)
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magicvar_remove(md);
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md = xzalloc(sizeof(*md));
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md->name = xstrdup(name);
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md->description = xstrdup(description);
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list_add_sort(&md->list, &magicvars, compare);
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return 0;
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}
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static void magicvar_build(void)
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{
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static int first = 1;
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struct magicvar *m;
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if (!first)
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return;
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for (m = &__barebox_magicvar_start;
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m != &__barebox_magicvar_end;
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m++)
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magicvar_add(m->name, m->description);
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first = 0;
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}
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static int do_magicvar(int argc, char *argv[])
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{
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struct magicvar_dyn *md;
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int opt;
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int verbose = 0, add = 0;
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magicvar_build();
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while ((opt = getopt(argc, argv, "va")) > 0) {
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switch (opt) {
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case 'v':
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verbose = 1;
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break;
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case 'a':
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add = 1;
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break;
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default:
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return COMMAND_ERROR_USAGE;
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}
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}
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if (add) {
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if (optind + 2 != argc)
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return COMMAND_ERROR_USAGE;
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return magicvar_add(argv[optind], argv[optind + 1]);
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}
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list_for_each_entry(md, &magicvars, list)
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magicvar_print_one(md, verbose);
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return 0;
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}
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BAREBOX_CMD_HELP_START(magicvar)
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BAREBOX_CMD_HELP_TEXT("Options:")
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BAREBOX_CMD_HELP_OPT ("-v", "verbose (list all value if there is one)")
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BAREBOX_CMD_HELP_OPT ("-a <NAME> <DESC>", "Add a new magicvar")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(magicvar)
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.cmd = do_magicvar,
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BAREBOX_CMD_DESC("list information about magic variables")
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BAREBOX_CMD_OPTS("[-va]")
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BAREBOX_CMD_HELP(cmd_magicvar_help)
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BAREBOX_CMD_GROUP(CMD_GRP_ENV)
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BAREBOX_CMD_END
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