diff options
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 77 |
1 files changed, 75 insertions, 2 deletions
diff --git a/shell/hush.c b/shell/hush.c index b53d1dc..dba12c1 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -48,7 +48,7 @@ * tilde expansion * aliases * builtins mandated by standards we don't support: - * [un]alias, command, fc, getopts: + * [un]alias, command, fc: * command -v CMD: print "/path/to/CMD" * prints "CMD" for builtins * prints "alias ALIAS='EXPANSION'" for aliases @@ -58,7 +58,6 @@ * (can use this to override standalone shell as well) * -p: use default $PATH * command BLTIN: disables special-ness (e.g. errors do not abort) - * getopts: getopt() for shells * fc -l[nr] [BEG] [END]: list range of commands in history * fc [-e EDITOR] [BEG] [END]: edit/rerun range of commands * fc -s [PAT=REP] [CMD]: rerun CMD, replacing PAT with REP @@ -294,6 +293,11 @@ //config: default y //config: depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH //config: +//config:config HUSH_GETOPTS +//config: bool "getopts builtin" +//config: default y +//config: depends on HUSH || SH_IS_HUSH || BASH_IS_HUSH +//config: //config:config HUSH_MEMLEAK //config: bool "memleak builtin (debugging)" //config: default n @@ -983,6 +987,9 @@ static int builtin_readonly(char **argv) FAST_FUNC; static int builtin_fg_bg(char **argv) FAST_FUNC; static int builtin_jobs(char **argv) FAST_FUNC; #endif +#if ENABLE_HUSH_GETOPTS +static int builtin_getopts(char **argv) FAST_FUNC; +#endif #if ENABLE_HUSH_HELP static int builtin_help(char **argv) FAST_FUNC; #endif @@ -1079,6 +1086,9 @@ static const struct built_in_command bltins1[] = { #if ENABLE_HUSH_JOB BLTIN("fg" , builtin_fg_bg , "Bring job to foreground"), #endif +#if ENABLE_HUSH_GETOPTS + BLTIN("getopts" , builtin_getopts , NULL), +#endif #if ENABLE_HUSH_HELP BLTIN("help" , builtin_help , NULL), #endif @@ -9859,6 +9869,69 @@ static int FAST_FUNC builtin_shift(char **argv) return EXIT_FAILURE; } +#if ENABLE_HUSH_GETOPTS +static int FAST_FUNC builtin_getopts(char **argv) +{ +/* +TODO: +if a character is followed by a colon, the option is expected to have +an argument, which should be separated from it by white space. +When an option requires an argument, getopts places that argument into +the variable OPTARG. + +If an invalid option is seen, getopts places ? into VAR and, if +not silent, prints an error message and unsets OPTARG. If +getopts is silent, the option character found is placed in +OPTARG and no diagnostic message is printed. + +If a required argument is not found, and getopts is not silent, +a question mark (?) is placed in VAR, OPTARG is unset, and a +diagnostic message is printed. If getopts is silent, then a +colon (:) is placed in VAR and OPTARG is set to the option +character found. + +Test that VAR is a valid variable name? +*/ + char cbuf[2]; + const char *cp, *optstring, *var; + int c, exitcode; + + optstring = *++argv; + if (!optstring || !(var = *++argv)) { + bb_error_msg("usage: getopts OPTSTRING VAR [ARGS]"); + return EXIT_FAILURE; + } + + cp = get_local_var_value("OPTERR"); + opterr = cp ? atoi(cp) : 1; + cp = get_local_var_value("OPTIND"); + optind = cp ? atoi(cp) : 0; + + /* getopts stops on first non-option. Add "+" to force that */ + /*if (optstring[0] != '+')*/ { + char *s = alloca(strlen(optstring) + 2); + sprintf(s, "+%s", optstring); + optstring = s; + } + + if (argv[1]) + argv[0] = G.global_argv[0]; /* for error messages */ + else + argv = G.global_argv; + c = getopt(string_array_len(argv), argv, optstring); + exitcode = EXIT_SUCCESS; + if (c < 0) { /* -1: end of options */ + exitcode = EXIT_FAILURE; + c = '?'; + } + cbuf[0] = c; + cbuf[1] = '\0'; + set_local_var_from_halves(var, cbuf); + set_local_var_from_halves("OPTIND", utoa(optind)); + return exitcode; +} +#endif + static int FAST_FUNC builtin_source(char **argv) { char *arg_path, *filename; |