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xz: Fix suffix check. 

The suffix refactor done in 99575947a5
had a small regression where raw format compression to standard out
failed if a suffix was not set. In this case, setting the suffix did
not make sense since a file is not created.

Now, xz should only fail when a suffix is not provided when it is
actually needed.

For instance:

    echo "foo" | xz --format=raw --lzma2 | wc -c

does not need a suffix check since it creates no files. But:

    xz --format=raw --lzma2 --suffix=.bar foo

Needs the suffix to be set since it must create foo.bar.
This commit is contained in:
Jia Tan 2023-11-14 20:27:04 +08:00
parent 84196e8c09
commit 87c956d4c4
1 changed files with 22 additions and 8 deletions
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30
src/xz/args.c
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@ -718,6 +718,28 @@ args_parse(args_info *args, int argc, char **argv)
if (opt_mode == MODE_COMPRESS && opt_format == FORMAT_AUTO) if (opt_mode == MODE_COMPRESS && opt_format == FORMAT_AUTO)
opt_format = FORMAT_XZ; opt_format = FORMAT_XZ;
// If raw format is used and a custom suffix is not provided,
// then only stdout mode can be used when compressing or
// decompressing.
if (opt_format == FORMAT_RAW && !suffix_is_set() && !opt_stdout
&& (opt_mode == MODE_COMPRESS
|| opt_mode == MODE_DECOMPRESS)) {
if (args->files_name != NULL)
message_fatal(_("With --format=raw, "
"--suffix=.SUF is required "
"unless writing to stdout"));
// If all of the filenames provided are "-" (more than one
// "-" could be specified) or no filenames are provided,
// then we are only going to be writing to standard out.
for (int i = optind; i < argc; i++) {
if (strcmp(argv[i], "-") != 0)
message_fatal(_("With --format=raw, "
"--suffix=.SUF is required "
"unless writing to stdout"));
}
}
// Compression settings need to be validated (options themselves and // Compression settings need to be validated (options themselves and
// their memory usage) when compressing to any file format. It has to // their memory usage) when compressing to any file format. It has to
// be done also when uncompressing raw data, since for raw decoding // be done also when uncompressing raw data, since for raw decoding
@ -727,14 +749,6 @@ args_parse(args_info *args, int argc, char **argv)
&& opt_mode != MODE_LIST)) && opt_mode != MODE_LIST))
coder_set_compression_settings(); coder_set_compression_settings();
// If raw format is used and a custom suffix is not provided,
// then only stdout mode can be used when compressing or decompressing.
if (opt_format == FORMAT_RAW && !suffix_is_set() && !opt_stdout
&& (opt_mode == MODE_COMPRESS
|| opt_mode == MODE_DECOMPRESS))
message_fatal(_("With --format=raw, --suffix=.SUF is "
"required unless writing to stdout"));
// If no filenames are given, use stdin. // If no filenames are given, use stdin.
if (argv[optind] == NULL && args->files_name == NULL) { if (argv[optind] == NULL && args->files_name == NULL) {
// We don't modify or free() the "-" constant. The caller // We don't modify or free() the "-" constant. The caller