inetd,ed,msh: data/bss reduction (in mss, more than 9k of it)

git-svn-id: svn://busybox.net/trunk/busybox@18234 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 61 insertions, 43 deletions

diff --git a/shell/msh.c b/shell/msh.c
index d9dd3efb2..66b10f346 100644
--- a/shell/msh.c
+++ b/shell/msh.c
@@ -13,12 +13,13 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
+# include <sys/times.h>
+# include <setjmp.h>
+
 #ifdef STANDALONE
 # ifndef _GNU_SOURCE
 #  define _GNU_SOURCE
 # endif
-# include <setjmp.h>
-# include <sys/times.h>
 # include <sys/types.h>
 # include <sys/stat.h>
 # include <sys/wait.h>
@@ -82,8 +83,6 @@ static char *itoa(int n)
         return local_buf;
 }
 #else
-# include <setjmp.h>
-# include <sys/times.h>
 # include "busybox.h"
 extern char **environ;
 #endif
@@ -162,12 +161,10 @@ int mshdbg_rc = 0;
  */
 typedef void xint;                              /* base type of jmp_buf, for not broken compilers */
 
+
 /*
  * shell components
  */
-
-#define QUOTE   0200
-
 #define NOBLOCK ((struct op *)NULL)
 #define NOWORD  ((char *)NULL)
 #define NOWORDS ((char **)NULL)
@@ -297,24 +294,21 @@ static char *flag = flags - 'a';
 static char *null;                              /* null value for variable */
 static int intr;                                /* interrupt pending */
 
-static char *trap[_NSIG + 1];
-static char ourtrap[_NSIG + 1];
+/* moved to G: static char *trap[_NSIG + 1]; */
+/* moved to G: static char ourtrap[_NSIG + 1]; */
 static int trapset;                             /* trap pending */
 
 static int heedint;                             /* heed interrupt signals */
 
 static int yynerrs;                             /* yacc */
 
-static char line[LINELIM];
-static char *elinep;
+/* moved to G: static char line[LINELIM]; */
 
 #if ENABLE_FEATURE_EDITING
 static char *current_prompt;
 static line_input_t *line_input_state;
 #endif
 
-static int areanum;                             /* current allocation area */
-
 
 /*
  * other functions
@@ -483,30 +477,16 @@ struct io {
 #define INSUB() (e.iop->task == XGRAVE || e.iop->task == XDOLL)
 
 static struct ioarg temparg = { 0, 0, 0, AFID_NOBUF, 0 };       /* temporary for PUSHIO */
-static struct ioarg ioargstack[NPUSH];
+/* moved to G: static struct ioarg ioargstack[NPUSH]; */
 static struct io iostack[NPUSH];
-static struct iobuf sharedbuf = { AFID_NOBUF };
-static struct iobuf mainbuf = { AFID_NOBUF };
+/* moved to G: static struct iobuf sharedbuf = { AFID_NOBUF }; */
+/* moved to G: static struct iobuf mainbuf = { AFID_NOBUF }; */
 static unsigned bufid = AFID_ID;        /* buffer id counter */
 
-#define PUSHIO(what,arg,gen) ((temparg.what = (arg)), pushio(&temparg,(gen)))
 #define RUN(what,arg,gen) ((temparg.what = (arg)), run(&temparg,(gen)))
 
 
 /*
- * parsing & execution environment
- */
-static struct env {
-        char *linep;
-        struct io *iobase;
-        struct io *iop;
-        xint *errpt;                            /* void * */
-        int iofd;
-        struct env *oenv;
-} e;
-
-
-/*
  * input generators for IO structure
  */
 static int nlchar(struct ioarg *ap);
@@ -537,6 +517,7 @@ static void ioecho(char c);
  * IO control
  */
 static void pushio(struct ioarg *argp, int (*f) (struct ioarg *));
+#define PUSHIO(what,arg,gen) ((temparg.what = (arg)), pushio(&temparg,(gen)))
 static int remap(int fd);
 static int openpipe(int *pv);
 static void closepipe(int *pv);
@@ -599,7 +580,6 @@ static int xstrcmp(char *p1, char *p2);
 static void glob0(char *a0, unsigned a1, int a2,
                                   int (*a3) (char *, char *));
 static void readhere(char **name, char *s, int ec);
-static void pushio(struct ioarg *argp, int (*f) (struct ioarg *));
 static int xxchar(struct ioarg *ap);
 
 struct here {
@@ -705,9 +685,6 @@ static struct brkcon *brklist;
 static int isbreak;
 static struct wdblock *wdlist;
 static struct wdblock *iolist;
-static char *trap[_NSIG + 1];
-static char ourtrap[_NSIG + 1];
-static int trapset;                             /* trap pending */
 
 #ifdef MSHDEBUG
 static struct var *mshdbg_var;
@@ -731,8 +708,7 @@ static int peeksym;
 static int nlseen;
 static int iounit = IODEFAULT;
 static YYSTYPE yylval;
-static char *elinep = line + sizeof(line) - 5;
-
+static char *elinep; /* done in main(): = line + sizeof(line) - 5 */
 
 static struct here *inhere;     /* list of hear docs while parsing */
 static struct here *acthere;    /* list of active here documents */
@@ -742,8 +718,20 @@ static struct region *areanxt;  /* starting point of scan */
 static void *brktop;
 static void *brkaddr;
 
+/*
+ * parsing & execution environment
+ */
+struct env {
+        char *linep;
+        struct io *iobase;
+        struct io *iop;
+        xint *errpt;            /* void * */
+        int iofd;
+        struct env *oenv;
+};
+
 static struct env e = {
-        line,                   /* linep:  char ptr */
+        NULL /* set to line in main() */, /* linep:  char ptr */
         iostack,                /* iobase:  struct io ptr */
         iostack - 1,            /* iop:  struct io ptr */
         (xint *) NULL,          /* errpt:  void ptr for errors? */
@@ -751,6 +739,29 @@ static struct env e = {
         (struct env *) NULL     /* oenv:  struct env ptr */
 };
 
+
+struct globals {
+        char ourtrap[_NSIG + 1];
+        char *trap[_NSIG + 1];
+        struct iobuf sharedbuf; /* in main(): set to { AFID_NOBUF } */
+        struct iobuf mainbuf; /* in main(): set to { AFID_NOBUF } */
+        struct ioarg ioargstack[NPUSH];
+        char filechar_cmdbuf[BUFSIZ];
+        char line[LINELIM];
+        char child_cmd[LINELIM];
+};
+
+#define G (*ptr_to_globals)
+#define ourtrap         (G.ourtrap        )
+#define trap            (G.trap           )
+#define sharedbuf       (G.sharedbuf      )
+#define mainbuf         (G.mainbuf        )
+#define ioargstack      (G.ioargstack     )
+#define filechar_cmdbuf (G.filechar_cmdbuf)
+#define line            (G.line           )
+#define child_cmd       (G.child_cmd      )
+
+
 #ifdef MSHDEBUG
 void print_t(struct op *t)
 {
@@ -1517,7 +1528,7 @@ static void onintr(int s)					/* ANSI C requires a parameter */
 
 #define CMASK   0377
 #define QUOTE   0200
-#define QMASK   (CMASK&~QUOTE)
+#define QMASK   (CMASK & ~QUOTE)
 #define NOT     '!'                                     /* might use ^ */
 
 static const char *cclass(const char *p, int sub)
@@ -4011,11 +4022,12 @@ static int dollar(int quoted)
 
 static int grave(int quoted)
 {
+        /* moved to G: static char child_cmd[LINELIM]; */
+
         const char *cp;
         int i;
         int j;
         int pf[2];
-        static char child_cmd[LINELIM];
         const char *src;
         char *dest;
         int count;
@@ -4823,15 +4835,15 @@ static int filechar(struct ioarg *ap)
         }
 #if ENABLE_FEATURE_EDITING
         if (interactive && isatty(ap->afile)) {
-                static char mycommand[BUFSIZ];
+                /* moved to G: static char filechar_cmdbuf[BUFSIZ]; */
                 static int position = 0, size = 0;
 
                 while (size == 0 || position >= size) {
-                        read_line_input(current_prompt, mycommand, BUFSIZ, line_input_state);
-                        size = strlen(mycommand);
+                        read_line_input(current_prompt, filechar_cmdbuf, BUFSIZ, line_input_state);
+                        size = strlen(filechar_cmdbuf);
                         position = 0;
                 }
-                c = mycommand[position];
+                c = filechar_cmdbuf[position];
                 position++;
                 return c;
         }
@@ -5176,6 +5188,12 @@ int msh_main(int argc, char **argv)
         char *name, **ap;
         int (*iof) (struct ioarg *);
 
+        PTR_TO_GLOBALS = xzalloc(sizeof(G));
+        sharedbuf.id = AFID_NOBUF;
+        mainbuf.id = AFID_NOBUF;
+        e.linep = line;
+        elinep = line + sizeof(line) - 5;
+
 #if ENABLE_FEATURE_EDITING
         line_input_state = new_line_input_t(FOR_SHELL);
 #endif