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81 lines
1.9 KiB
Diff
81 lines
1.9 KiB
Diff
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Copyright (C) 2006 OpenWrt.org
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diff -urN busybox.old/shell/ash.c busybox.dev/shell/ash.c
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--- busybox.old/shell/ash.c 2005-11-12 22:39:19.853826250 +0100
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+++ busybox.dev/shell/ash.c 2005-11-12 22:39:42.771258500 +0100
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@@ -1414,6 +1414,13 @@
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#define NUMBUILTINS (sizeof (builtincmd) / sizeof (struct builtincmd) )
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+static const char *safe_applets[] = {
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+ "[", "test", "echo", "cat",
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+ "ln", "cp", "touch", "mkdir", "rm",
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+ "cut", "hexdump", "awk", "sort",
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+ "find", "xargs", "ls", "dd",
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+ "chown", "chmod"
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+};
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struct cmdentry {
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@@ -2050,6 +2057,19 @@
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static void exitshell(void) __attribute__((__noreturn__));
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static int decode_signal(const char *, int);
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+
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+static int is_safe_applet(char *name)
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+{
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+ int n = sizeof(safe_applets) / sizeof(char *);
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+ int i;
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+ for (i = 0; i < n; i++)
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+ if (strcmp(safe_applets[i], name) == 0)
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+ return 1;
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+
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+ return 0;
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+}
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+
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+
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/*
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* This routine is called when an error or an interrupt occurs in an
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* interactive shell and control is returned to the main command loop.
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@@ -3680,6 +3700,7 @@
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clearredir(1);
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envp = environment();
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if (strchr(argv[0], '/') != NULL
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+ || is_safe_applet(argv[0])
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#ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
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|| find_applet_by_name(argv[0])
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#endif
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@@ -3721,6 +3742,18 @@
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tryexec(char *cmd, char **argv, char **envp)
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{
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int repeated = 0;
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+ struct BB_applet *a;
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+ int argc = 0;
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+ char **c;
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+
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+ if(strchr(cmd, '/') == NULL && is_safe_applet(cmd) && (a = find_applet_by_name(cmd)) != NULL) {
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+ c = argv;
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+ while (*c != NULL) {
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+ c++; argc++;
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+ }
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+ bb_applet_name = cmd;
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+ exit(a->main(argc, argv));
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+ }
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#ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
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int flg_bb = 0;
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char *name = cmd;
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@@ -3919,6 +3952,12 @@
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}
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#endif
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+ if (is_safe_applet(name)) {
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+ entry->cmdtype = CMDNORMAL;
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+ entry->u.index = -1;
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+ return;
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+ }
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+
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updatetbl = (path == pathval());
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if (!updatetbl) {
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act |= DO_ALTPATH;
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