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-rw-r--r--toys/pending/getopt.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/toys/pending/getopt.c b/toys/pending/getopt.c
new file mode 100644
index 00000000..7780cb6e
--- /dev/null
+++ b/toys/pending/getopt.c
@@ -0,0 +1,104 @@
+/* getopt.c - Parse command-line options
+ *
+ * Copyright 2019 The Android Open Source Project
+
+USE_GETOPT(NEWTOY(getopt, "^(alternative)a(name)n:(options)o:(long)(longoptions)l*Tu", TOYFLAG_USR|TOYFLAG_BIN))
+
+config GETOPT
+ bool "getopt"
+ default y
+ help
+ usage: getopt [OPTIONS] [--] ARG...
+
+ Parse command-line options for use in shell scripts.
+
+ -a Allow long options starting with a single -.
+ -l OPTS Specify long options.
+ -n NAME Command name for error messages.
+ -o OPTS Specify short options.
+ -T Test whether this is a modern getopt.
+ -u Output options unquoted.
+*/
+
+#define FOR_getopt
+#include "toys.h"
+
+GLOBALS(
+ struct arg_list *l;
+ char *o, *n;
+)
+
+static void out(char *s)
+{
+ if (FLAG(u)) printf(" %s", s);
+ else {
+ printf(" '");
+ for (; *s; s++) {
+ if (*s == '\'') printf("'\\''");
+ else putchar(*s);
+ }
+ printf("'");
+ }
+}
+
+static char *parse_long_opt(void *data, char *str, int len)
+{
+ struct option **lopt_ptr = data, *lopt = *lopt_ptr;
+
+ // Trailing : or :: means this option takes a required or optional argument.
+ // no_argument = 0, required_argument = 1, optional_argument = 2.
+ for (lopt->has_arg = 0; len>0 && str[len-1] == ':'; lopt->has_arg++) len--;
+ if (!len || lopt->has_arg>2) return str;
+
+ lopt->name = xstrndup(str, len);
+
+ (*lopt_ptr)++;
+ return 0;
+}
+
+void getopt_main(void)
+{
+ int argc = toys.optc+1;
+ char **argv = xzalloc(sizeof(char *)*(argc+1));
+ struct option *lopts = xzalloc(sizeof(struct option)*argc), *lopt = lopts;
+ int i = 0, j = 0, ch;
+
+ if (FLAG(T)) {
+ toys.exitval = 4;
+ return;
+ }
+
+ comma_args(TT.l, &lopt, "bad -l", parse_long_opt);
+ argv[j++] = TT.n ? TT.n : "getopt";
+
+ // Legacy mode: don't quote output and take the first argument as OPTSTR.
+ if (!FLAG(o)) {
+ toys.optflags |= FLAG_u;
+ TT.o = toys.optargs[i++];
+ if (!TT.o) error_exit("no OPTSTR");
+ --argc;
+ }
+
+ while (i<toys.optc) argv[j++] = toys.optargs[i++];
+
+ // BSD getopts don't honor argv[0] (for -n), so handle errors ourselves.
+ opterr = 0;
+ optind = 1;
+ while ((ch = (FLAG(a)?getopt_long_only:getopt_long)(argc, argv, TT.o,
+ lopts, &i)) != -1) {
+ if (ch == '?') {
+ fprintf(stderr, "%s: invalid option '%c'\n", argv[0], optopt);
+ toys.exitval = 1;
+ } else if (!ch) {
+ printf(" --%s", lopts[i].name);
+ if (lopts[i].has_arg) out(optarg ? optarg : "");
+ } else {
+ printf(" -%c", ch);
+ if (optarg) out(optarg);
+ }
+ }
+
+ printf(" --");
+ for (; optind<argc; optind++) out(argv[optind]);
+ printf("\n");
+}