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msh: smallish code shrinkage; cosmetics

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This commit is contained in:
Denis Vlasenko 2007-04-09 03:06:34 +00:00
parent 32b633aa3f
commit 95cb3263ae
1 changed files with 58 additions and 68 deletions
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126
shell/msh.c
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@ -13,8 +13,8 @@
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details. * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/ */
# include <sys/times.h> #include <sys/times.h>
# include <setjmp.h> #include <setjmp.h>
#ifdef STANDALONE #ifdef STANDALONE
# ifndef _GNU_SOURCE # ifndef _GNU_SOURCE
@ -291,15 +291,10 @@ static char flags['z' - 'a' + 1];
/* this looks weird, but is OK ... we index flag with 'a'...'z' */ /* this looks weird, but is OK ... we index flag with 'a'...'z' */
static char *flag = flags - 'a'; static char *flag = flags - 'a';
static char *null; /* null value for variable */
static int intr; /* interrupt pending */
/* moved to G: static char *trap[_NSIG + 1]; */ /* moved to G: static char *trap[_NSIG + 1]; */
/* moved to G: static char ourtrap[_NSIG + 1]; */ /* moved to G: static char ourtrap[_NSIG + 1]; */
static int trapset; /* trap pending */ static int trapset; /* trap pending */
static int heedint; /* heed interrupt signals */
static int yynerrs; /* yacc */ static int yynerrs; /* yacc */
/* moved to G: static char line[LINELIM]; */ /* moved to G: static char line[LINELIM]; */
@ -615,55 +610,54 @@ struct res {
int r_val; int r_val;
}; };
static const struct res restab[] = { static const struct res restab[] = {
{"for", FOR}, { "for" , FOR },
{"case", CASE}, { "case" , CASE },
{"esac", ESAC}, { "esac" , ESAC },
{"while", WHILE}, { "while", WHILE },
{"do", DO}, { "do" , DO },
{"done", DONE}, { "done" , DONE },
{"if", IF}, { "if" , IF },
{"in", IN}, { "in" , IN },
{"then", THEN}, { "then" , THEN },
{"else", ELSE}, { "else" , ELSE },
{"elif", ELIF}, { "elif" , ELIF },
{"until", UNTIL}, { "until", UNTIL },
{"fi", FI}, { "fi" , FI },
{";;", BREAK}, { ";;" , BREAK },
{"||", LOGOR}, { "||" , LOGOR },
{"&&", LOGAND}, { "&&" , LOGAND },
{"{", '{'}, { "{" , '{' },
{"}", '}'}, { "}" , '}' },
{".", DOT}, { "." , DOT },
{0, 0}, { NULL , 0 },
}; };
struct builtincmd { struct builtincmd {
const char *name; const char *name;
int (*builtinfunc) (struct op * t); int (*builtinfunc)(struct op *t);
}; };
static const struct builtincmd builtincmds[] = { static const struct builtincmd builtincmds[] = {
{".", dodot}, { "." , dodot },
{":", dolabel}, { ":" , dolabel },
{"break", dobreak}, { "break" , dobreak },
{"cd", dochdir}, { "cd" , dochdir },
{"continue", docontinue}, { "continue", docontinue },
{"eval", doeval}, { "eval" , doeval },
{"exec", doexec}, { "exec" , doexec },
{"exit", doexit}, { "exit" , doexit },
{"export", doexport}, { "export" , doexport },
{"help", dohelp}, { "help" , dohelp },
{"login", dologin}, { "login" , dologin },
{"newgrp", dologin}, { "newgrp" , dologin },
{"read", doread}, { "read" , doread },
{"readonly", doreadonly}, { "readonly", doreadonly },
{"set", doset}, { "set" , doset },
{"shift", doshift}, { "shift" , doshift },
{"times", dotimes}, { "times" , dotimes },
{"trap", dotrap}, { "trap" , dotrap },
{"umask", doumask}, { "umask" , doumask },
{"wait", dowait}, { "wait" , dowait },
{0, 0} { NULL , NULL },
}; };
static struct op *scantree(struct op *); static struct op *scantree(struct op *);
@ -697,11 +691,11 @@ static struct var *path; /* search path for commands */
static struct var *shell; /* shell to interpret command files */ static struct var *shell; /* shell to interpret command files */
static struct var *ifs; /* field separators */ static struct var *ifs; /* field separators */
static int areanum; /* current allocation area */ static int areanum; /* current allocation area */
static int intr; static int intr; /* interrupt pending */
static int inparse; static int inparse;
static char *null = (char*)""; static char *null = (char*)""; /* null value for variable */
static int heedint = 1; static int heedint = 1; /* heed interrupt signals */
static void (*qflag) (int) = SIG_IGN; static void (*qflag) (int) = SIG_IGN;
static int startl; static int startl;
static int peeksym; static int peeksym;
@ -2693,7 +2687,7 @@ typedef int (*builtin_func_ptr)(struct op *);
static builtin_func_ptr inbuilt(const char *s) { static builtin_func_ptr inbuilt(const char *s) {
const struct builtincmd *bp; const struct builtincmd *bp;
for (bp = builtincmds; bp->name != NULL; bp++) for (bp = builtincmds; bp->name; bp++)
if (strcmp(bp->name, s) == 0) if (strcmp(bp->name, s) == 0)
return bp->builtinfunc; return bp->builtinfunc;
@ -3191,29 +3185,27 @@ static int dohelp(struct op *t)
puts("\nBuilt-in commands:\n" puts("\nBuilt-in commands:\n"
"-------------------"); "-------------------");
for (col = 0, x = builtincmds; x->builtinfunc != NULL; x++) { col = 0;
if (!x->name) x = builtincmds;
continue; while (x->name) {
col += printf("%s%s", ((col == 0) ? "\t" : " "), x->name); col += printf("%c%s", ((col == 0) ? '\t' : ' '), x->name);
if (col > 60) { if (col > 60) {
puts(""); puts("");
col = 0; col = 0;
} }
x++;
} }
#if ENABLE_FEATURE_SH_STANDALONE_SHELL #if ENABLE_FEATURE_SH_STANDALONE_SHELL
{ {
int i; const struct BB_applet *applet = applets;
const struct BB_applet *applet;
for (i = 0, applet = applets; i < NUM_APPLETS; applet++, i++) { while (applet->name) {
if (!applet->name) col += printf("%c%s", ((col == 0) ? '\t' : ' '), applet->name);
continue;
col += printf("%s%s", ((col == 0) ? "\t" : " "), applet->name);
if (col > 60) { if (col > 60) {
puts(""); puts("");
col = 0; col = 0;
} }
applet++;
} }
} }
#endif #endif
@ -3221,8 +3213,6 @@ static int dohelp(struct op *t)
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }
static int dolabel(struct op *t) static int dolabel(struct op *t)
{ {
return 0; return 0;