diff options
| -rw-r--r-- | src/xz/args.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/xz/args.c b/src/xz/args.c index 57f34823..97b22448 100644 --- a/src/xz/args.c +++ b/src/xz/args.c @@ -374,7 +374,14 @@ parse_environment(args_info *args, char *argv0) int argc = 1; bool prev_was_space = true; for (size_t i = 0; env[i] != '\0'; ++i) { - if (isspace(env[i])) { + // NOTE: Cast to unsigned char is needed so that correct + // value gets passed to isspace(), which expects + // unsigned char cast to int. Casting to int is done + // automatically due to integer promotion, but we need to + // force char to unsigned char manually. Otherwise 8-bit + // characters would get promoted to wrong value if + // char is signed. + if (isspace((unsigned char)env[i])) { prev_was_space = true; } else if (prev_was_space) { prev_was_space = false; @@ -399,7 +406,7 @@ parse_environment(args_info *args, char *argv0) argc = 1; prev_was_space = true; for (size_t i = 0; env[i] != '\0'; ++i) { - if (isspace(env[i])) { + if (isspace((unsigned char)env[i])) { prev_was_space = true; env[i] = '\0'; } else if (prev_was_space) { |