| /* vi: set sw=4 ts=4: */ |
| /* |
| * getopt.c - Enhanced implementation of BSD getopt(1) |
| * Copyright (c) 1997, 1998, 1999, 2000 Frodo Looijaard <frodol@dds.nl> |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| |
| /* |
| * Version 1.0-b4: Tue Sep 23 1997. First public release. |
| * Version 1.0: Wed Nov 19 1997. |
| * Bumped up the version number to 1.0 |
| * Fixed minor typo (CSH instead of TCSH) |
| * Version 1.0.1: Tue Jun 3 1998 |
| * Fixed sizeof instead of strlen bug |
| * Bumped up the version number to 1.0.1 |
| * Version 1.0.2: Thu Jun 11 1998 (not present) |
| * Fixed gcc-2.8.1 warnings |
| * Fixed --version/-V option (not present) |
| * Version 1.0.5: Tue Jun 22 1999 |
| * Make -u option work (not present) |
| * Version 1.0.6: Tue Jun 27 2000 |
| * No important changes |
| * Version 1.1.0: Tue Jun 30 2000 |
| * Added NLS support (partly written by Arkadiusz Mickiewicz |
| * <misiek@misiek.eu.org>) |
| * Ported to Busybox - Alfred M. Szmidt <ams@trillian.itslinux.org> |
| * Removed --version/-V and --help/-h in |
| * Removed parse_error(), using bb_error_msg() from Busybox instead |
| * Replaced our_malloc with xmalloc and our_realloc with xrealloc |
| * |
| */ |
| |
| #include <getopt.h> |
| #include "libbb.h" |
| |
| /* NON_OPT is the code that is returned when a non-option is found in '+' |
| mode */ |
| enum { |
| NON_OPT = 1, |
| #if ENABLE_FEATURE_GETOPT_LONG |
| /* LONG_OPT is the code that is returned when a long option is found. */ |
| LONG_OPT = 2 |
| #endif |
| }; |
| |
| /* For finding activated option flags. Must match getopt32 call! */ |
| enum { |
| OPT_o = 0x1, // -o |
| OPT_n = 0x2, // -n |
| OPT_q = 0x4, // -q |
| OPT_Q = 0x8, // -Q |
| OPT_s = 0x10, // -s |
| OPT_T = 0x20, // -T |
| OPT_u = 0x40, // -u |
| #if ENABLE_FEATURE_GETOPT_LONG |
| OPT_a = 0x80, // -a |
| OPT_l = 0x100, // -l |
| #endif |
| SHELL_IS_TCSH = 0x8000, /* hijack this bit for other purposes */ |
| }; |
| |
| /* 0 is getopt_long, 1 is getopt_long_only */ |
| #define alternative (option_mask32 & OPT_a) |
| |
| #define quiet_errors (option_mask32 & OPT_q) |
| #define quiet_output (option_mask32 & OPT_Q) |
| #define quote (!(option_mask32 & OPT_u)) |
| #define shell_TCSH (option_mask32 & SHELL_IS_TCSH) |
| |
| /* |
| * This function 'normalizes' a single argument: it puts single quotes around |
| * it and escapes other special characters. If quote is false, it just |
| * returns its argument. |
| * Bash only needs special treatment for single quotes; tcsh also recognizes |
| * exclamation marks within single quotes, and nukes whitespace. |
| * This function returns a pointer to a buffer that is overwritten by |
| * each call. |
| */ |
| static const char *normalize(const char *arg) |
| { |
| char *bufptr; |
| #if ENABLE_FEATURE_CLEAN_UP |
| static char *BUFFER = NULL; |
| free(BUFFER); |
| #else |
| char *BUFFER; |
| #endif |
| |
| if (!quote) { /* Just copy arg */ |
| BUFFER = xstrdup(arg); |
| return BUFFER; |
| } |
| |
| /* Each character in arg may take up to four characters in the result: |
| For a quote we need a closing quote, a backslash, a quote and an |
| opening quote! We need also the global opening and closing quote, |
| and one extra character for '\0'. */ |
| BUFFER = xmalloc(strlen(arg)*4 + 3); |
| |
| bufptr = BUFFER; |
| *bufptr ++= '\''; |
| |
| while (*arg) { |
| if (*arg == '\'') { |
| /* Quote: replace it with: '\'' */ |
| *bufptr ++= '\''; |
| *bufptr ++= '\\'; |
| *bufptr ++= '\''; |
| *bufptr ++= '\''; |
| } else if (shell_TCSH && *arg == '!') { |
| /* Exclamation mark: replace it with: \! */ |
| *bufptr ++= '\''; |
| *bufptr ++= '\\'; |
| *bufptr ++= '!'; |
| *bufptr ++= '\''; |
| } else if (shell_TCSH && *arg == '\n') { |
| /* Newline: replace it with: \n */ |
| *bufptr ++= '\\'; |
| *bufptr ++= 'n'; |
| } else if (shell_TCSH && isspace(*arg)) { |
| /* Non-newline whitespace: replace it with \<ws> */ |
| *bufptr ++= '\''; |
| *bufptr ++= '\\'; |
| *bufptr ++= *arg; |
| *bufptr ++= '\''; |
| } else |
| /* Just copy */ |
| *bufptr ++= *arg; |
| arg++; |
| } |
| *bufptr ++= '\''; |
| *bufptr ++= '\0'; |
| return BUFFER; |
| } |
| |
| /* |
| * Generate the output. argv[0] is the program name (used for reporting errors). |
| * argv[1..] contains the options to be parsed. argc must be the number of |
| * elements in argv (ie. 1 if there are no options, only the program name), |
| * optstr must contain the short options, and longopts the long options. |
| * Other settings are found in global variables. |
| */ |
| #if !ENABLE_FEATURE_GETOPT_LONG |
| #define generate_output(argv,argc,optstr,longopts) \ |
| generate_output(argv,argc,optstr) |
| #endif |
| static int generate_output(char **argv, int argc, const char *optstr, const struct option *longopts) |
| { |
| int exit_code = 0; /* We assume everything will be OK */ |
| int opt; |
| #if ENABLE_FEATURE_GETOPT_LONG |
| int longindex; |
| #endif |
| const char *charptr; |
| |
| if (quiet_errors) /* No error reporting from getopt(3) */ |
| opterr = 0; |
| |
| /* We used it already in main() in getopt32(), |
| * we *must* reset getopt(3): */ |
| #ifdef __GLIBC__ |
| optind = 0; |
| #else /* BSD style */ |
| optind = 1; |
| /* optreset = 1; */ |
| #endif |
| |
| while (1) { |
| opt = |
| #if ENABLE_FEATURE_GETOPT_LONG |
| alternative ? |
| getopt_long_only(argc, argv, optstr, longopts, &longindex) : |
| getopt_long(argc, argv, optstr, longopts, &longindex); |
| #else |
| getopt(argc, argv, optstr); |
| #endif |
| if (opt == -1) |
| break; |
| if (opt == '?' || opt == ':' ) |
| exit_code = 1; |
| else if (!quiet_output) { |
| #if ENABLE_FEATURE_GETOPT_LONG |
| if (opt == LONG_OPT) { |
| printf(" --%s", longopts[longindex].name); |
| if (longopts[longindex].has_arg) |
| printf(" %s", |
| normalize(optarg ? optarg : "")); |
| } else |
| #endif |
| if (opt == NON_OPT) |
| printf(" %s", normalize(optarg)); |
| else { |
| printf(" -%c", opt); |
| charptr = strchr(optstr, opt); |
| if (charptr != NULL && *++charptr == ':') |
| printf(" %s", |
| normalize(optarg ? optarg : "")); |
| } |
| } |
| } |
| |
| if (!quiet_output) { |
| printf(" --"); |
| while (optind < argc) |
| printf(" %s", normalize(argv[optind++])); |
| bb_putchar('\n'); |
| } |
| return exit_code; |
| } |
| |
| #if ENABLE_FEATURE_GETOPT_LONG |
| /* |
| * Register several long options. options is a string of long options, |
| * separated by commas or whitespace. |
| * This nukes options! |
| */ |
| static struct option *add_long_options(struct option *long_options, char *options) |
| { |
| int long_nr = 0; |
| int arg_opt, tlen; |
| char *tokptr = strtok(options, ", \t\n"); |
| |
| if (long_options) |
| while (long_options[long_nr].name) |
| long_nr++; |
| |
| while (tokptr) { |
| arg_opt = no_argument; |
| tlen = strlen(tokptr); |
| if (tlen) { |
| tlen--; |
| if (tokptr[tlen] == ':') { |
| arg_opt = required_argument; |
| if (tlen && tokptr[tlen-1] == ':') { |
| tlen--; |
| arg_opt = optional_argument; |
| } |
| tokptr[tlen] = '\0'; |
| if (tlen == 0) |
| bb_error_msg_and_die("empty long option specified"); |
| } |
| long_options = xrealloc_vector(long_options, 4, long_nr); |
| long_options[long_nr].has_arg = arg_opt; |
| /*long_options[long_nr].flag = NULL; - xrealloc_vector did it */ |
| long_options[long_nr].val = LONG_OPT; |
| long_options[long_nr].name = xstrdup(tokptr); |
| long_nr++; |
| /*memset(&long_options[long_nr], 0, sizeof(long_options[0])); - xrealloc_vector did it */ |
| } |
| tokptr = strtok(NULL, ", \t\n"); |
| } |
| return long_options; |
| } |
| #endif |
| |
| static void set_shell(const char *new_shell) |
| { |
| if (!strcmp(new_shell, "bash") || !strcmp(new_shell, "sh")) |
| return; |
| if (!strcmp(new_shell, "tcsh") || !strcmp(new_shell, "csh")) |
| option_mask32 |= SHELL_IS_TCSH; |
| else |
| bb_error_msg("unknown shell '%s', assuming bash", new_shell); |
| } |
| |
| |
| /* Exit codes: |
| * 0) No errors, successful operation. |
| * 1) getopt(3) returned an error. |
| * 2) A problem with parameter parsing for getopt(1). |
| * 3) Internal error, out of memory |
| * 4) Returned for -T |
| */ |
| |
| #if ENABLE_FEATURE_GETOPT_LONG |
| static const char getopt_longopts[] ALIGN1 = |
| "options\0" Required_argument "o" |
| "longoptions\0" Required_argument "l" |
| "quiet\0" No_argument "q" |
| "quiet-output\0" No_argument "Q" |
| "shell\0" Required_argument "s" |
| "test\0" No_argument "T" |
| "unquoted\0" No_argument "u" |
| "alternative\0" No_argument "a" |
| "name\0" Required_argument "n" |
| ; |
| #endif |
| |
| int getopt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int getopt_main(int argc, char **argv) |
| { |
| char *optstr = NULL; |
| char *name = NULL; |
| unsigned opt; |
| const char *compatible; |
| char *s_arg; |
| #if ENABLE_FEATURE_GETOPT_LONG |
| struct option *long_options = NULL; |
| llist_t *l_arg = NULL; |
| #endif |
| |
| compatible = getenv("GETOPT_COMPATIBLE"); /* used as yes/no flag */ |
| |
| if (argc == 1) { |
| if (compatible) { |
| /* For some reason, the original getopt gave no error |
| when there were no arguments. */ |
| printf(" --\n"); |
| return 0; |
| } |
| bb_error_msg_and_die("missing optstring argument"); |
| } |
| |
| if (argv[1][0] != '-' || compatible) { |
| char *s; |
| |
| option_mask32 |= OPT_u; /* quoting off */ |
| s = xstrdup(argv[1] + strspn(argv[1], "-+")); |
| argv[1] = argv[0]; |
| return generate_output(argv+1, argc-1, s, long_options); |
| } |
| |
| #if !ENABLE_FEATURE_GETOPT_LONG |
| opt = getopt32(argv, "+o:n:qQs:Tu", &optstr, &name, &s_arg); |
| #else |
| applet_long_options = getopt_longopts; |
| opt_complementary = "l::"; |
| opt = getopt32(argv, "+o:n:qQs:Tual:", |
| &optstr, &name, &s_arg, &l_arg); |
| /* Effectuate the read options for the applet itself */ |
| while (l_arg) { |
| long_options = add_long_options(long_options, llist_pop(&l_arg)); |
| } |
| #endif |
| |
| if (opt & OPT_s) { |
| set_shell(s_arg); |
| } |
| |
| if (opt & OPT_T) { |
| return 4; |
| } |
| |
| /* All options controlling the applet have now been parsed */ |
| if (!optstr) { |
| if (optind >= argc) |
| bb_error_msg_and_die("missing optstring argument"); |
| optstr = argv[optind++]; |
| } |
| |
| argv[optind-1] = name ? name : argv[0]; |
| return generate_output(argv+optind-1, argc-optind+1, optstr, long_options); |
| } |