From 4f7e4c8201e580b9d31c09d8a484741072033c01 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Sun, 28 Sep 2014 18:40:18 +0800 Subject: [BUILTIN] Correctly handle test ! ! = ! This patch adds a special case in testcmd for the 4-argument expression beginning with a !. Without this ! ! = ! is deemed a syntax error, which breaks POSIX. Note that this special case does not extend down into subexpressions so if ! ! = ! is used inside parentheses then a syntax error will still occur as before. Signed-off-by: Herbert Xu --- src/bltin/test.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'src') diff --git a/src/bltin/test.c b/src/bltin/test.c index baa91a5..458e9f5 100644 --- a/src/bltin/test.c +++ b/src/bltin/test.c @@ -177,7 +177,7 @@ testcmd(int argc, char **argv) { const struct t_op *op; enum token n; - int res; + int res = 1; if (*argv[0] == '[') { if (*argv[--argc] != ']') @@ -185,11 +185,12 @@ testcmd(int argc, char **argv) argv[argc] = NULL; } +recheck: argv++; argc--; if (argc < 1) - return 1; + return res; /* * POSIX prescriptions: he who wrote this deserves the Nobel @@ -209,6 +210,9 @@ testcmd(int argc, char **argv) argv[--argc] = NULL; argv++; argc--; + } else if (!strcmp(argv[0], "!")) { + res = 0; + goto recheck; } } @@ -216,7 +220,7 @@ testcmd(int argc, char **argv) eval: t_wp = argv; - res = !oexpr(n); + res ^= oexpr(n); argv = t_wp; if (argv[0] != NULL && argv[1] != NULL) -- cgit 1.4.1