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Look for full command names instead of substrings 

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;
}
}