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-rw-r--r--toys/other/lsattr.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/toys/other/lsattr.c b/toys/other/lsattr.c
index cd236b9e..3e327920 100644
--- a/toys/other/lsattr.c
+++ b/toys/other/lsattr.c
@@ -67,6 +67,8 @@ GLOBALS(
long p;
long add, rm, set;
+ // !add and !rm tell us whether they were used, but `chattr =` is meaningful.
+ int have_set;
)
#define FS_PROJINHERT_FL 0x20000000 // Linux 4.5
@@ -264,6 +266,7 @@ static void parse_cmdline_arg(char ***argv)
TT.add |= get_flag_val(*ptr);
break;
case '=':
+ TT.have_set = 1;
for (ptr = ++arg; *ptr; ptr++)
TT.set |= get_flag_val(*ptr);
break;
@@ -297,7 +300,7 @@ static int update_attr(struct dirtree *root)
}
// Any potential flag changes?
- if (TT.set | TT.add | TT.set) {
+ if (TT.have_set | TT.add | TT.rm) {
unsigned long orig, new;
// Read current flags.
@@ -308,7 +311,7 @@ static int update_attr(struct dirtree *root)
return DIRTREE_ABORT;
}
// Apply the requested changes.
- if (TT.set) new = TT.set; // '='.
+ if (TT.have_set) new = TT.set; // '='.
else { // '-' and/or '+'.
new = orig;
new &= ~(TT.rm);
@@ -347,10 +350,10 @@ void chattr_main(void)
if (TT.p < 0 || TT.p > UINT_MAX) error_exit("bad projid %lu", TT.p);
if (TT.v < 0 || TT.v > UINT_MAX) error_exit("bad version %ld", TT.v);
if (!*argv) help_exit("no file");
- if (TT.set && (TT.add || TT.rm))
+ if (TT.have_set && (TT.add || TT.rm))
error_exit("no '=' with '-' or '+'");
if (TT.rm & TT.add) error_exit("set/unset same flag");
- if (!(TT.add || TT.rm || TT.set || FLAG(p) || FLAG(v)))
+ if (!(TT.add || TT.rm || TT.have_set || FLAG(p) || FLAG(v)))
error_exit("need '-p', '-v', '=', '-', or '+'");
for (; *argv; argv++) dirtree_read(*argv, update_attr);
}