common BUFSIZ BSS buffer, small reduce code, data and bss

coreutils/dos2unix.c

@@ -44,12 +44,13 @@
  * to pick a random letter to add to out temporary file. */
 typedef unsigned long int bb_uint64_t;
 
+#define tempFn bb_common_bufsiz1
+
 /* if fn is NULL then input is stdin and output is stdout */
 static int convert(char *fn, int ConvType)
 {
 	int c, fd;
 	struct timeval tv;
-	RESERVE_CONFIG_BUFFER(tempFn, BUFSIZ);
 	static bb_uint64_t value=0;
 	FILE *in, *out;
 

coreutils/tee.c

@@ -39,7 +39,7 @@ int tee_main(int argc, char **argv)
 	int retval = EXIT_SUCCESS;
 #ifdef CONFIG_FEATURE_TEE_USE_BLOCK_IO
 	ssize_t c;
-	RESERVE_CONFIG_BUFFER(buf, BUFSIZ);
+# define buf bb_common_bufsiz1
 #else
 	int c;
 #endif
@@ -88,10 +88,6 @@ int tee_main(int argc, char **argv)
 		retval = EXIT_FAILURE;
 	}
 
-#ifdef CONFIG_FEATURE_CLEAN_UP
-	RELEASE_CONFIG_BUFFER(buf);
-#endif
-
 #else
 	setvbuf(stdout, NULL, _IONBF, 0);
 	while ((c = getchar()) != EOF) {

coreutils/tr.c

@@ -38,10 +38,11 @@
 static char com_fl, del_fl, sq_fl;
 static short in_index, out_index;
 /* these last are pointers to static buffers declared in tr_main */
-static unsigned char *poutput, *pinput;
+static unsigned char *poutput;
 static unsigned char *pvector;
 static char *pinvec, *poutvec;
 
+#define input bb_common_bufsiz1
 
 static void convert(void)
 {
@@ -51,14 +52,14 @@ static void convert(void)
 
 	for (;;) {
 		if (in_index == read_chars) {
-			if ((read_chars = read(0, (char *) pinput, BUFSIZ)) <= 0) {
+			if ((read_chars = read(0, input, BUFSIZ)) <= 0) {
 				if (write(1, (char *) poutput, out_index) != out_index)
 					bb_error_msg(bb_msg_write_error);
 				exit(0);
 			}
 			in_index = 0;
 		}
-		c = pinput[in_index++];
+		c = input[in_index++];
 		coded = pvector[c];
 		if (del_fl && pinvec[c])
 			continue;
@@ -208,14 +209,12 @@ extern int tr_main(int argc, char **argv)
 	int idx = 1;
 	int i;
 	RESERVE_CONFIG_BUFFER(output, BUFSIZ);
-	RESERVE_CONFIG_BUFFER(input,  BUFSIZ);
 	RESERVE_CONFIG_UBUFFER(vector, ASCII+1);
 	RESERVE_CONFIG_BUFFER(invec,  ASCII+1);
 	RESERVE_CONFIG_BUFFER(outvec, ASCII+1);
 
 	/* ... but make them available globally */
 	poutput = output;
-	pinput  = input;
 	pvector = vector;
 	pinvec  = invec;
 	poutvec = outvec;

editors/vi.c

@@ -2226,7 +2226,8 @@ static int mysleep(int hund)	// sleep for 'h' 1/100 seconds
 	return (FD_ISSET(0, &rfds));
 }
 
-static Byte readbuffer[BUFSIZ];
+#define readbuffer bb_common_bufsiz1
+
 static int readed_for_parse;
 
 //----- IO Routines --------------------------------------------

include/libbb.h

@@ -333,6 +333,12 @@ extern const char * const bb_path_group_file;
 extern const char * const bb_path_securetty_file;
 extern const char * const bb_path_motd_file;
 extern const char * const bb_dev_null;
+
+#ifndef BUFSIZ
+#define BUFSIZ 4096
+#endif
+extern char bb_common_bufsiz1[BUFSIZ+1];
+
 /*
  * You can change LIBBB_DEFAULT_LOGIN_SHELL, but don`t use,
  * use bb_default_login_shell and next defines,

libbb/Makefile.in

@@ -47,7 +47,8 @@ LIBBB_MOBJ0:=full_version.o \
 	can_not_create_raw_socket.o perm_denied_are_you_root.o \
 	shadow_file.o passwd_file.o group_file.o gshadow_file.o nologin_file.o \
 	securetty_file.o motd_file.o \
-	msg_standard_input.o msg_standard_output.o shell_file.o bb_dev_null.o
+	msg_standard_input.o msg_standard_output.o shell_file.o \
+	bb_dev_null.o bb_common_bufsiz1.o
 
 LIBBB_MSRC1:=$(srcdir)/xfuncs.c
 LIBBB_MOBJ1:=xmalloc.o xrealloc.o xcalloc.o xstrdup.o xstrndup.o \

libbb/messages.c

@@ -101,3 +101,6 @@ const char * const bb_default_login_shell = LIBBB_DEFAULT_LOGIN_SHELL;
 const char * const bb_dev_null = "/dev/null";
 #endif
 
+#ifdef L_bb_common_bufsiz1
+char bb_common_bufsiz1[BUFSIZ+1];
+#endif

loginutils/getty.c

@@ -110,15 +110,6 @@ extern void updwtmp(const char *filename, const struct utmp *ut);
 #define TCGETA  TCGETS
 #define TCSETA  TCSETS
 #define TCSETAW TCSETSW
-#endif
-
- /*
-  * This program tries to not use the standard-i/o library.  This keeps the
-  * executable small on systems that do not have shared libraries (System V
-  * Release <3).
-  */
-#ifndef BUFSIZ
-#define BUFSIZ          1024
 #endif
 
  /*
@@ -744,12 +735,12 @@ static void next_speed(struct termio *tp, struct options *op)
 /* return NULL on failure, logname on success */
 static char *get_logname(struct options *op, struct chardata *cp, struct termio *tp)
 {
-	static char logname[BUFSIZ];
+#define logname bb_common_bufsiz1
 	char *bp;
-	char c;                                         /* input character, full eight bits */
-	char ascval;                            /* low 7 bits of input character */
-	int bits;                                       /* # of "1" bits per character */
-	int mask;                                       /* mask with 1 bit up */
+	char c;				/* input character, full eight bits */
+	char ascval;                    /* low 7 bits of input character */
+	int bits;                       /* # of "1" bits per character */
+	int mask;                       /* mask with 1 bit up */
 	static char *erase[] = {        /* backspace-space-backspace */
 		"\010\040\010",                 /* space parity */
 		"\010\040\010",                 /* odd parity */

loginutils/sulogin.c

@@ -21,7 +21,7 @@
 #define SULOGIN_PROMPT "\nGive root password for system maintenance\n" \
 	"(or type Control-D for normal startup):"
 
-static const char *forbid[] = {
+static const char * const forbid[] = {
 	"ENV",
 	"BASH_ENV",
 	"HOME",
@@ -53,11 +53,13 @@ extern int sulogin_main(int argc, char **argv)
 	char *device = (char *) 0;
 	const char *name = "root";
 	int timeout = 0;
-	static char pass[BUFSIZ];
+	
+#define pass bb_common_bufsiz1
+	
 	struct passwd pwent;
 	struct passwd *pwd;
 	time_t start, now;
-	const char **p;
+	const char * const *p;
 #ifdef CONFIG_FEATURE_SHADOWPASSWDS
 	struct spwd *spwd = NULL;
 #endif							/* CONFIG_FEATURE_SHADOWPASSWDS */

networking/nc.c

@@ -48,7 +48,9 @@ static void timeout(int signum)
 int nc_main(int argc, char **argv)
 {
 	int do_listen = 0, lport = 0, delay = 0, wsecs = 0, tmpfd, opt, sfd, x;
-	char buf[BUFSIZ];
+	
+#define buf bb_common_bufsiz1
+	
 #ifdef CONFIG_NC_GAPING_SECURITY_HOLE
 	char *pr00gie = NULL;
 #endif

shell/ash.c

@@ -568,7 +568,7 @@ struct parsefile {
 };
 
 static struct parsefile basepf;         /* top level input file */
-static char basebuf[IBUFSIZ];           /* buffer for top level input file */
+#define basebuf bb_common_bufsiz1       /* buffer for top level input file */
 static struct parsefile *parsefile = &basepf;  /* current input file */
 
 
@@ -5939,7 +5939,6 @@ varunset(const char *end, const char *var, const char *umsg, int varflags)
  */
 
 #define EOF_NLEFT -99           /* value of parsenleft when EOF pushed back */
-#define IBUFSIZ (BUFSIZ + 1)
 
 static void pushfile(void);