1 files changed, 73 insertions, 0 deletions

diff --git a/shell/bbsh.c b/shell/bbsh.c
new file mode 100644
index 000000000..f2d76cc01
--- /dev/null
+++ b/shell/bbsh.c
@@ -0,0 +1,73 @@
+/* vi: set ts=4 :
+ * 
+ * bbsh - busybox shell
+ *
+ * Copyright 2006 Rob Landley <rob@landley.net>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+// Handle embedded NUL bytes in the command line.
+
+#include <busybox.h>
+
+static int handle(char *command)
+{
+        int argc=0;
+        char *argv[10], *start = command;
+
+        // Parse command into argv[]
+        for (;;) {
+                char *end;
+
+                // Skip leading whitespace and detect EOL.
+                while(isspace(*start)) start++;
+                if(!*start || *start=='#') break;
+
+                // Grab next word.  (Add dequote and envvar logic here)
+                end=start;
+                while(*end && !isspace(*end)) end++;
+                argv[argc++]=xstrndup(start,end-start);
+                start=end;
+        }
+        argv[argc]=0;
+
+        if (!argc) return 0;
+        if (argc==2 && !strcmp(argv[0],"cd")) chdir(argv[1]);
+        else if(!strcmp(argv[0],"exit")) exit(argc>1 ? atoi(argv[1]) : 0); 
+        else {
+                int status;
+                pid_t pid=fork();
+                if(!pid) {
+                        run_applet_by_name(argv[0],argc,argv);
+                        execvp(argv[0],argv);
+                        printf("No %s",argv[0]);
+                        exit(1);
+                } else waitpid(pid, &status, 0);
+        }
+        while(argc) free(argv[--argc]);
+
+        return 0;
+}
+
+int bbsh_main(int argc, char *argv[])
+{
+        char *command=NULL;
+        FILE *f;
+
+        bb_getopt_ulflags(argc, argv, "c:", &command);
+
+        f = argv[optind] ? xfopen(argv[optind],"r") : NULL;
+        if (command) handle(command);
+        else {
+                unsigned cmdlen=0;
+                for (;;) {
+                        if(!f) putchar('$');
+                        if(1 > getline(&command,&cmdlen,f ? : stdin)) break;
+                        handle(command);
+                }
+                if (ENABLE_FEATURE_CLEAN_UP) free(command);
+        }
+                
+        return 1;
+}