/* SPDX-License-Identifier: LGPL-2.1 OR MIT */ /* * getopt function definitions for NOLIBC, adapted from musl libc * Copyright (C) 2005-2020 Rich Felker, et al. * Copyright (C) 2025 Thomas Weißschuh <linux@weissschuh.net> */ /* make sure to include all global symbols */ #include "nolibc.h" #ifndef _NOLIBC_GETOPT_H #define _NOLIBC_GETOPT_H struct FILE; static struct FILE *const stderr; static int fprintf(struct FILE *stream, const char *fmt, ...); __attribute__((weak,unused,section(".data.nolibc_getopt"))) char *optarg; __attribute__((weak,unused,section(".data.nolibc_getopt"))) int optind = 1, opterr = 1, optopt; static __attribute__((unused)) int getopt(int argc, char * const argv[], const char *optstring) { static int __optpos; int i; char c, d; char *optchar; if (!optind) { __optpos = 0; optind = 1; } if (optind >= argc || !argv[optind]) return -1; if (argv[optind][0] != '-') { if (optstring[0] == '-') { optarg = argv[optind++]; return 1; } return -1; } if (!argv[optind][1]) return -1; if (argv[optind][1] == '-' && !argv[optind][2]) return optind++, -1; if (!__optpos) __optpos++; c = argv[optind][__optpos]; optchar = argv[optind] + __optpos; __optpos++; if (!argv[optind][__optpos]) { optind++; __optpos = 0; } if (optstring[0] == '-' || optstring[0] == '+') optstring++; i = 0; d = 0; do { d = optstring[i++]; } while (d && d != c); if (d != c || c == ':') { optopt = c; if (optstring[0] != ':' && opterr) fprintf(stderr, "%s: unrecognized option: %c\n", argv[0], *optchar); return '?'; } if (optstring[i] == ':') { optarg = 0; if (optstring[i + 1] != ':' || __optpos) { optarg = argv[optind++]; if (__optpos) optarg += __optpos; __optpos = 0; } if (optind > argc) { optopt = c; if (optstring[0] == ':') return ':'; if (opterr) fprintf(stderr, "%s: option requires argument: %c\n", argv[0], *optchar); return '?'; } } return c; } #endif /* _NOLIBC_GETOPT_H */