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| author | Denys Vlasenko | 2017-08-11 02:37:48 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2017-08-11 02:37:48 +0200 |
| commit | 9a7d0a01918df5a963b6c90177b321ff743282b2 (patch) | |
| tree | 3378d6ce2ad70e7bc34423bd59ca49e5e9aa1304 /shell/hush.c | |
| parent | 81f962f3df0d7194b7a52c6f83259727759094c4 (diff) | |
| download | busybox-9a7d0a01918df5a963b6c90177b321ff743282b2.zip busybox-9a7d0a01918df5a963b6c90177b321ff743282b2.tar.gz | |
shell: add OPTARG poisoning to getopt_optarg.tests
ash fails this!
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/shell/hush.c b/shell/hush.c index f9a8de4..dc05f24 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -9872,7 +9872,8 @@ static int FAST_FUNC builtin_shift(char **argv) #if ENABLE_HUSH_GETOPTS static int FAST_FUNC builtin_getopts(char **argv) { -/* +/* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/getopts.html + TODO: If an invalid option is seen, getopts places ? into VAR and, if not silent, prints an error message and unsets OPTARG. If @@ -9886,6 +9887,8 @@ colon (:) is placed in VAR and OPTARG is set to the option character found. Test that VAR is a valid variable name? + +"Whenever the shell is invoked, OPTIND shall be initialized to 1" */ char cbuf[2]; const char *cp, *optstring, *var; @@ -9920,14 +9923,20 @@ Test that VAR is a valid variable name? exitcode = EXIT_FAILURE; c = '?'; } - if (optarg) - set_local_var_from_halves("OPTARG", optarg); - else - unset_local_var("OPTARG"); cbuf[0] = c; cbuf[1] = '\0'; set_local_var_from_halves(var, cbuf); set_local_var_from_halves("OPTIND", utoa(optind)); + + /* Always set or unset, never left as-is, even on exit/error: + * "If no option was found, or if the option that was found + * does not have an option-argument, OPTARG shall be unset." + */ + if (optarg) + set_local_var_from_halves("OPTARG", optarg); + else + unset_local_var("OPTARG"); + return exitcode; } #endif |