General cleanup of command line parsing to allow "busybox" to work as a prefix.

(I.E. any argv[0] that starts with "busybox" winds up in busybox_main().)

Added testing/busybox.tests which tests the following permutations:

./busybox
./busybox-suffix
./busybox cat
./busybox-suffix cat
./busybox --help
./busybox-suffix --help
./busybox --help cat
./busybox-suffix --help cat
./busybox --help unknown
./busybox-suffix --help unknown
./unknown

Also repair the test suite so ./runtest calls the ".tests" scripts properly.

Note: you can now go "busybox busybox busbox ls -l" and it'll take it.  The
new code is pretty generic.  I can block that if anybody can come up with a
good reason to...

5 files changed, 185 insertions, 127 deletions

diff --git a/applets/applets.c b/applets/applets.c
index ce9ecbbc5..21b0c3dbc 100644
--- a/applets/applets.c
+++ b/applets/applets.c
@@ -90,8 +90,7 @@ static int suid_cfg_readable;
 
 
 
-extern void
-bb_show_usage (void)
+extern void bb_show_usage (void)
 {
   const char *format_string;
   const char *usage_string = usage_messages;
@@ -112,8 +111,7 @@ bb_show_usage (void)
   exit (EXIT_FAILURE);
 }
 
-static int
-applet_name_compare (const void *x, const void *y)
+static int applet_name_compare (const void *x, const void *y)
 {
   const char *name = x;
   const struct BB_applet *applet = y;
@@ -123,47 +121,25 @@ applet_name_compare (const void *x, const void *y)
 
 extern const size_t NUM_APPLETS;
 
-struct BB_applet *
-find_applet_by_name (const char *name)
+struct BB_applet *find_applet_by_name (const char *name)
 {
   return bsearch (name, applets, NUM_APPLETS, sizeof (struct BB_applet),
                                   applet_name_compare);
 }
 
-void
-run_applet_by_name (const char *name, int argc, char **argv)
+void run_applet_by_name (const char *name, int argc, char **argv)
 {
-  static int recurse_level = 0;
-  extern int been_there_done_that;      /* From busybox.c */
-
-#ifdef CONFIG_FEATURE_SUID_CONFIG
-  if (recurse_level == 0)
-        parse_config_file ();
-#endif
-
-  recurse_level++;
-  /* Do a binary search to find the applet entry given the name. */
-  if ((applet_using = find_applet_by_name (name)) != NULL) {
-        bb_applet_name = applet_using->name;
-        if (argv[1] && strcmp (argv[1], "--help") == 0) {
-          if (strcmp (applet_using->name, "busybox") == 0) {
-                if (argv[2])
-                  applet_using = find_applet_by_name (argv[2]);
-                else
-                  applet_using = NULL;
-          }
-          if (applet_using)
-                bb_show_usage ();
-          been_there_done_that = 1;
-          busybox_main (0, NULL);
+        if(ENABLE_FEATURE_SUID_CONFIG) parse_config_file ();
+
+        if(!strncmp(name, "busybox", 7)) busybox_main(argc, argv);
+        /* Do a binary search to find the applet entry given the name. */
+        applet_using = find_applet_by_name(name);
+        if(applet_using) {
+                bb_applet_name = applet_using->name;
+                if(argc==2 && !strcmp(argv[1], "--help")) bb_show_usage ();
+                if(ENABLE_FEATURE_SUID) check_suid (applet_using);
+                exit ((*(applet_using->main)) (argc, argv));
         }
-#ifdef CONFIG_FEATURE_SUID
-        check_suid (applet_using);
-#endif
-
-        exit ((*(applet_using->main)) (argc, argv));
-  }
-  recurse_level--;
 }
 
 
diff --git a/applets/busybox.c b/applets/busybox.c
index ee74b4c18..420c9c0e5 100644
--- a/applets/busybox.c
+++ b/applets/busybox.c
@@ -9,7 +9,6 @@
 #include <locale.h>
 #endif
 
-int been_there_done_that = 0; /* Also used in applets.c */
 const char *bb_applet_name;
 
 #ifdef CONFIG_FEATURE_INSTALLER
@@ -32,17 +31,6 @@ static const char* const install_dir[] = {
 /* abstract link() */
 typedef int (*__link_f)(const char *, const char *);
 
-/*
- * Where in the filesystem is this busybox?
- * [return]
- *              malloc'd string w/ full pathname of busybox's location
- *              NULL on failure
- */
-static inline char *busybox_fullpath(void)
-{
-        return xreadlink("/proc/self/exe");
-}
-
 /* create (sym)links for each applet */
 static void install_links(const char *busybox, int use_symbolic_links)
 {
@@ -72,41 +60,27 @@ int main(int argc, char **argv)
 {
         const char *s;
 
-        bb_applet_name = argv[0];
-
-        if (bb_applet_name[0] == '-')
-                bb_applet_name++;
+        bb_applet_name=argv[0];
+        if (*bb_applet_name == '-') bb_applet_name++;
+        for (s = bb_applet_name; *s ;)
+                if (*(s++) == '/') bb_applet_name = s;
 
-        for (s = bb_applet_name; *s != '\0';) {
-                if (*s++ == '/')
-                        bb_applet_name = s;
-        }
-
-#ifdef CONFIG_LOCALE_SUPPORT
-#ifdef CONFIG_INIT
-        if(getpid()!=1) /* Do not set locale for `init' */
-#endif
-        {
+        /* Set locale for everybody except `init' */
+        if(ENABLE_LOCALE_SUPPORT && (!ENABLE_INIT || getpid()==1))
                 setlocale(LC_ALL, "");
-        }
-#endif
 
         run_applet_by_name(bb_applet_name, argc, argv);
         bb_error_msg_and_die("applet not found");
 }
 
-
 int busybox_main(int argc, char **argv)
 {
-        int col = 0, len, i;
-
-#ifdef CONFIG_FEATURE_INSTALLER
         /*
          * This style of argument parsing doesn't scale well
          * in the event that busybox starts wanting more --options.
          * If someone has a cleaner approach, by all means implement it.
          */
-        if (argc > 1 && (strcmp(argv[1], "--install") == 0)) {
+        if (ENABLE_FEATURE_INSTALLER && argc > 1 && !strcmp(argv[1], "--install")) {
                 int use_symbolic_links = 0;
                 int rc = 0;
                 char *busybox;
@@ -119,7 +93,7 @@ int busybox_main(int argc, char **argv)
                 }
 
                 /* link */
-                busybox = busybox_fullpath();
+                busybox = xreadlink("/proc/self/exe");
                 if (busybox) {
                         install_links(busybox, use_symbolic_links);
                         free(busybox);
@@ -128,60 +102,45 @@ int busybox_main(int argc, char **argv)
                 }
                 return rc;
         }
-#endif /* CONFIG_FEATURE_INSTALLER */
-
-        argc--;
-
-        /* If we've already been here once, exit now */
-        if (been_there_done_that == 1 || argc < 1) {
-                const struct BB_applet *a = applets;
-                int output_width = 60;
-
-#ifdef CONFIG_FEATURE_AUTOWIDTH
-                /* Obtain the terminal width.  */
-                get_terminal_width_height(0, &output_width, NULL);
-                /* leading tab and room to wrap */
-                output_width -= 20;
-#endif
 
-                printf("%s\n\n"
-                       "Usage: busybox [function] [arguments]...\n"
-                       "   or: [function] [arguments]...\n\n"
-                       "\tBusyBox is a multi-call binary that combines many common Unix\n"
-                       "\tutilities into a single executable.  Most people will create a\n"
-                       "\tlink to busybox for each function they wish to use and BusyBox\n"
-                       "\twill act like whatever it was invoked as!\n"
-                       "\nCurrently defined functions:\n", bb_msg_full_version);
-
-                while (a->name != 0) {
-                        col +=
-                                printf("%s%s", ((col == 0) ? "\t" : ", "),
-                                       (a++)->name);
-                        if (col > output_width && a->name != 0) {
-                                printf(",\n");
-                                col = 0;
+        /* Deal with --help.  (Also print help when called with no arguments) */
+        
+        if (argc==1 || !strcmp(argv[1],"--help") ) {
+                if (argc>2) run_applet_by_name(bb_applet_name=argv[2], argc, argv);
+                else {
+                        const struct BB_applet *a;
+                        int col, output_width;
+
+                        if (ENABLE_FEATURE_AUTOWIDTH) {
+                                /* Obtain the terminal width.  */
+                                get_terminal_width_height(0, &output_width, NULL);
+                                /* leading tab and room to wrap */
+                                output_width -= 20;
+                        } else output_width = 60;
+
+                        printf("%s\n\n"
+                               "Usage: busybox [function] [arguments]...\n"
+                               "   or: [function] [arguments]...\n\n"
+                               "\tBusyBox is a multi-call binary that combines many common Unix\n"
+                               "\tutilities into a single executable.  Most people will create a\n"
+                               "\tlink to busybox for each function they wish to use and BusyBox\n"
+                               "\twill act like whatever it was invoked as!\n"
+                               "\nCurrently defined functions:\n", bb_msg_full_version);
+
+                        col=0;
+                        for(a = applets; a->name;) {
+                                col += printf("%s%s", (col ? ", " : "\t"), (a++)->name);
+                                if (col > output_width && a->name) {
+                                        printf(",\n");
+                                        col = 0;
+                                }
                         }
+                        printf("\n\n");
+                        exit(0);
                 }
-                printf("\n\n");
-                exit(0);
-        }
-
-        /* Flag that we've been here already */
-        been_there_done_that = 1;
-
-        /* Move the command line down a notch */
-        /* Preserve pointers so setproctitle() works consistently */
-        len = argv[argc] + strlen(argv[argc]) - argv[1];
-        memmove(argv[0], argv[1], len);
-        memset(argv[0] + len, 0, argv[1] - argv[0]);
-
-        /* Fix up the argv pointers */
-        len = argv[1] - argv[0];
-        memmove(argv, argv + 1, sizeof(char *) * (argc + 1));
-        for (i = 0; i < argc; i++)
-                argv[i] -= len;
-
-        return (main(argc, argv));
+        } else run_applet_by_name(bb_applet_name=argv[1], argc-1, argv+1);
+        
+        bb_error_msg_and_die("applet not found");
 }
 
 /*
diff --git a/testsuite/busybox.tests b/testsuite/busybox.tests
new file mode 100755
index 000000000..f26f01b0c
--- /dev/null
+++ b/testsuite/busybox.tests
@@ -0,0 +1,123 @@
+#!/bin/sh
+
+# Tests for busybox applet itself.
+# Copyright 2005 by Rob Landley <rob@landley.net>
+# Licensed under GPL v2, see file LICENSE for details.
+
+if [ ${#COMMAND} -eq 0 ]; then COMMAND=busybox; fi
+. testing.sh
+
+# We'll assume "cat" is built in, because we need some other command to test.
+
+HELPDUMP=`$COMMAND`
+
+# The gratuitous "\n"s are due to a shell idiosyncrasy: environment variables
+# seem to strip trailing whitespace, which makes cmp and diff unhappy.
+
+ln -s `which "$COMMAND"` busybox-suffix
+ln -s `which "$COMMAND"` unknown
+
+for i in busybox busybox-suffix
+do
+        # The gratuitous "\n"s are due to a shell idiosyncrasy:
+        # environment variables seem to strip trailing whitespace.
+
+        testing "$i" "" "$HELPDUMP\n\n" "" ""
+
+        testing "$i cat" "cat" "moo" "" "moo"
+
+        testing "$i unknown" "unknown 2>&1" \
+                "unknown: applet not found\n" "" ""
+
+        testing "$i --help" "--help 2>&1" "$HELPDUMP\n\n" "" ""
+
+        testing "$i --help cat" "--help cat 2>&1 | grep prints" \
+                "Concatenates FILE(s) and prints them to stdout.\n" "" ""
+
+        testing "$i --help unknown" "--help unknown 2>&1" \
+                "unknown: applet not found\n" "" ""
+
+        COMMAND=./busybox-suffix
+done
+
+COMMAND="./unknown"
+testing "busybox as unknown name" "2>&1" "unknown: applet not found\n" "" ""
+
+rm -f busybox-suffix unknown
+
+exit
+
+General cleanup of command line parsing to allow "busybox" to work as a prefix.
+(I.E. any argv[0] that starts with "busybox" winds up in busybox_main().)
+
+Tests:
+./busybox
+./busybox-walrus
+./busybox ls
+./busybox-walrus ls
+./busybox --help
+./busybox-walrus --help
+./busybox --help ls
+./busybox-walrus --help ls
+./busybox --help walrus
+./busybox-walrus --help walrus
+
+
+
+
+
+
+
+
+
+# These tests require the full option set.
+
+# Longish chunk of data re-used by the next few tests
+
+data="42        1       3       woot
+42      1       010     zoology
+egg     1       2       papyrus
+7       3       42      soup
+999     3       0       algebra
+"
+
+# Sorting with keys
+
+testing "sort one key" "-k4,4 input" \
+"999    3       0       algebra
+egg     1       2       papyrus
+7       3       42      soup
+42      1       3       woot
+42      1       010     zoology
+" "$data" ""
+
+testing "sort key range with numeric option" "-k2,3n input" \
+"42     1       010     zoology
+42      1       3       woot
+egg     1       2       papyrus
+7       3       42      soup
+999     3       0       algebra
+" "$data" ""
+
+# Busybox is definitely doing this one wrong just now...
+
+testing "sort key range with numeric option and global reverse" \
+"-k2,3n -r input" \
+"egg    1       2       papyrus
+42      1       3       woot
+42      1       010     zoology
+999     3       0       algebra
+7       3       42      soup
+" "$data" ""
+
+# 
+
+testing "sort key range with multiple options" "-k2,3rn input" \
+"7      3       42      soup
+999     3       0       algebra
+42      1       010     zoology
+42      1       3       woot
+egg     1       2       papyrus
+" "$data" ""
+
+exit $FAILCOUNT
diff --git a/testsuite/runtest b/testsuite/runtest
index 91b794317..6a0dc9d3e 100755
--- a/testsuite/runtest
+++ b/testsuite/runtest
@@ -97,8 +97,8 @@ for applet in $applets; do
                         status=1
                 fi
         fi
-
-        if [ -f "$applet".tests ]
+        applet=`echo "$applet" | sed -n 's/\.tests$//p'`
+        if [ ${#applet} != 0 ]
         then
                 rm -f links/"$applet"
                 ln -s ../../busybox links/"$applet"
diff --git a/testsuite/testing.sh b/testsuite/testing.sh
index d516f722a..0925d090d 100755
--- a/testsuite/testing.sh
+++ b/testsuite/testing.sh
@@ -48,13 +48,13 @@ function testing()
   if [ $? -ne 0 ]
   then
         FAILCOUNT=$[$FAILCOUNT+1]
-        echo FAIL:"$1"
+        echo "FAIL: $1"
         if [ $verbose ]
         then
                 diff -u expected actual
         fi
   else
-        echo PASS:"$1"
+        echo "PASS: $1"
   fi
   rm -f input expected actual