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Look for full command names instead of substrings

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like "un", "cat", and "lz" when determining if
xz is run as unxz, xzcat, lzma, unlzma, or lzcat.

This is to ensure that if xz is renamed (e.g. via
--program-transform-name), it doesn't so easily
work in wrong mode.
This commit is contained in:
Lasse Collin 2009-07-10 11:33:21 +03:00
parent 6f62fa88f4
commit eed9953732
1 changed files with 14 additions and 10 deletions
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24
src/xz/args.c
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@ -465,19 +465,23 @@ args_parse(args_info *args, int argc, char **argv)
// NOTE: It's possible that name[0] is now '\0' if argv[0]
// is weird, but it doesn't matter here.
// If the command name contains "lz",
// it implies --format=lzma.
if (strstr(name, "lz") != NULL)
opt_format = FORMAT_LZMA;
// Operation mode
if (strstr(name, "cat") != NULL) {
// Imply --decompress --stdout
// Look for full command names instead of substrings like
// "un", "cat", and "lz" to reduce possibility of false
// positives when the programs have been renamed.
if (strstr(name, "xzcat") != NULL) {
opt_mode = MODE_DECOMPRESS;
opt_stdout = true;
} else if (strstr(name, "un") != NULL) {
// Imply --decompress
} else if (strstr(name, "unxz") != NULL) {
opt_mode = MODE_DECOMPRESS;
} else if (strstr(name, "lzcat") != NULL) {
opt_format = FORMAT_LZMA;
opt_mode = MODE_DECOMPRESS;
opt_stdout = true;
} else if (strstr(name, "unlzma") != NULL) {
opt_format = FORMAT_LZMA;
opt_mode = MODE_DECOMPRESS;
} else if (strstr(name, "lzma") != NULL) {
opt_format = FORMAT_LZMA;
}
}