diff options
Diffstat (limited to 'iconv')
| -rw-r--r-- | iconv/iconv_prog.c | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/iconv/iconv_prog.c b/iconv/iconv_prog.c index a67c6ebad1..dd1b9689b6 100644 --- a/iconv/iconv_prog.c +++ b/iconv/iconv_prog.c @@ -28,6 +28,7 @@ #include <langinfo.h> #include <locale.h> #include <search.h> +#include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -216,10 +217,47 @@ main (int argc, char *argv[]) if (cd == (iconv_t) -1) { if (errno == EINVAL) - error (EXIT_FAILURE, 0, - _("conversion from `%s' to `%s' not supported"), - from_code[0] ? from_code : nl_langinfo (CODESET), - orig_to_code[0] ? orig_to_code : nl_langinfo (CODESET)); + { + /* Try to be nice with the user and tell her which of the + two encoding names is wrong. This is possible because + all supported encodings can be converted from/to Unicode, + in other words, because the graph of encodings is + connected. */ + bool from_wrong = + (iconv_open ("UTF-8", from_code) == (iconv_t) -1 + && errno == EINVAL); + bool to_wrong = + (iconv_open (to_code, "UTF-8") == (iconv_t) -1 + && errno == EINVAL); + const char *from_pretty = + (from_code[0] ? from_code : nl_langinfo (CODESET)); + const char *to_pretty = + (orig_to_code[0] ? orig_to_code : nl_langinfo (CODESET)); + + if (from_wrong) + { + if (to_wrong) + error (EXIT_FAILURE, 0, + _("\ +conversions from `%s' and to `%s' are not supported"), + from_pretty, to_pretty); + else + error (EXIT_FAILURE, 0, + _("conversion from `%s' is not supported"), + from_pretty); + } + else + { + if (to_wrong) + error (EXIT_FAILURE, 0, + _("conversion to `%s' is not supported"), + to_pretty); + else + error (EXIT_FAILURE, 0, + _("conversion from `%s' to `%s' is not supported"), + from_pretty, to_pretty); + } + } else error (EXIT_FAILURE, errno, _("failed to start conversion processing")); |