From 55f30b05ac6902ac17bad04f38fd4f381a8d75f7 Mon Sep 17 00:00:00 2001 From: Denis Vlasenko Date: Sat, 24 Mar 2007 22:42:29 +0000 Subject: inetd,ed,msh: data/bss reduction (in mss, more than 9k of it) --- shell/msh.c | 104 +++++++++++++++++++++++++++++++++++------------------------- 1 file changed, 61 insertions(+), 43 deletions(-) (limited to 'shell/msh.c') 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 +# include + #ifdef STANDALONE # ifndef _GNU_SOURCE # define _GNU_SOURCE # endif -# include -# include # include # include # include @@ -82,8 +83,6 @@ static char *itoa(int n) return local_buf; } #else -# include -# include # 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 @@ -483,29 +477,15 @@ 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 */ @@ -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 -- cgit v1.2.3