Major rework of the directory structure and the entire build system.

 -Erik

1 files changed, 0 insertions, 850 deletions

diff --git a/sed.c b/sed.c
deleted file mode 100644
index 709fb13..0000000
--- a/sed.c
+++ /dev/null
@@ -1,850 +0,0 @@
-/*
- * sed.c - very minimalist version of sed
- *
- * Copyright (C) 1999,2000,2001 by Lineo, inc.
- * Written by Mark Whitley <markw@lineo.com>, <markw@codepoet.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-/*
-	Supported features and commands in this version of sed:
-
-	 - comments ('#')
-	 - address matching: num|/matchstr/[,num|/matchstr/|$]command
-	 - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags)
-	 - edit commands: (a)ppend, (i)nsert, (c)hange
-	 - file commands: (r)ead
-	 - backreferences in substitution expressions (\1, \2...\9)
-	 
-	 (Note: Specifying an address (range) to match is *optional*; commands
-	 default to the whole pattern space if no specific address match was
-	 requested.)
-
-	Unsupported features:
-
-	 - transliteration (y/source-chars/dest-chars/) (use 'tr')
-	 - no pattern space hold space storing / swapping (x, etc.)
-	 - no labels / branching (: label, b, t, and friends)
-	 - and lots, lots more.
-*/
-
-#include <stdio.h>
-#include <unistd.h> /* for getopt() */
-#include <regex.h>
-#include <string.h> /* for strdup() */
-#include <errno.h>
-#include <ctype.h> /* for isspace() */
-#include <stdlib.h>
-#include "busybox.h"
-
-/* externs */
-extern void xregcomp(regex_t *preg, const char *regex, int cflags);
-extern int optind; /* in unistd.h */
-extern char *optarg; /* ditto */
-
-/* options */
-static int be_quiet = 0;
-
-
-struct sed_cmd {
-
-
-	/* GENERAL FIELDS */
-	char delimiter;	    /* The delimiter used to separate regexps */
-
-	/* address storage */
-	int beg_line; /* 'sed 1p'   0 == no begining line, apply commands to all lines */
-	int end_line; /* 'sed 1,3p' 0 == no end line, use only beginning. -1 == $ */
-	regex_t *beg_match; /* sed -e '/match/cmd' */
-	regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
-
-	/* the command */
-	char cmd; /* p,d,s (add more at your leisure :-) */
-
-
-	/* SUBSTITUTION COMMAND SPECIFIC FIELDS */
-
-	/* sed -e 's/sub_match/replace/' */
-	regex_t *sub_match;
-	char *replace;
-	unsigned int num_backrefs:4; /* how many back references (\1..\9) */
-			/* Note:  GNU/POSIX sed does not save more than nine backrefs, so
-			 * we only use 4 bits to hold the number */
-	unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */
-	unsigned int sub_p:2; /* sed -e 's/foo/bar/p' (print substitution) */
-
-
-	/* EDIT COMMAND (a,i,c) SPEICIFIC FIELDS */
-
-	char *editline;
-
-
-	/* FILE COMMAND (r) SPEICIFIC FIELDS */
-
-	char *filename;
-};
-
-/* globals */
-static struct sed_cmd *sed_cmds = NULL; /* growable arrary holding a sequence of sed cmds */
-static int ncmds = 0; /* number of sed commands */
-
-/*static char *cur_file = NULL;*/ /* file currently being processed XXX: do I need this? */
-
-#ifdef BB_FEATURE_CLEAN_UP
-static void destroy_cmd_strs()
-{
-	if (sed_cmds == NULL)
-		return;
-
-	/* destroy all the elements in the array */
-	while (--ncmds >= 0) {
-
-		if (sed_cmds[ncmds].beg_match) {
-			regfree(sed_cmds[ncmds].beg_match);
-			free(sed_cmds[ncmds].beg_match);
-		}
-		if (sed_cmds[ncmds].end_match) {
-			regfree(sed_cmds[ncmds].end_match);
-			free(sed_cmds[ncmds].end_match);
-		}
-		if (sed_cmds[ncmds].sub_match) {
-			regfree(sed_cmds[ncmds].sub_match);
-			free(sed_cmds[ncmds].sub_match);
-		}
-		if (sed_cmds[ncmds].replace)
-			free(sed_cmds[ncmds].replace);
-	}
-
-	/* destroy the array */
-	free(sed_cmds);
-	sed_cmds = NULL;
-}
-#endif
-
-
-/*
- * index_of_next_unescaped_regexp_delim - walks left to right through a string
- * beginning at a specified index and returns the index of the next regular
- * expression delimiter (typically a forward * slash ('/')) not preceeded by 
- * a backslash ('\').
- */
-static int index_of_next_unescaped_regexp_delim(struct sed_cmd *sed_cmd, const char *str, int idx)
-{
-	int bracket = -1;
-	int escaped = 0;
-
-	for ( ; str[idx]; idx++) {
-		if (bracket != -1) {
-			if (str[idx] == ']' && !(bracket == idx - 1 ||
-									 (bracket == idx - 2 && str[idx-1] == '^')))
-				bracket = -1;
-		} else if (escaped)
-			escaped = 0;
-		else if (str[idx] == '\\')
-			escaped = 1;
-		else if (str[idx] == '[')
-			bracket = idx;
-		else if (str[idx] == sed_cmd->delimiter)
-			return idx;
-	}
-
-	/* if we make it to here, we've hit the end of the string */
-	return -1;
-}
-
-/*
- * returns the index in the string just past where the address ends.
- */
-static int get_address(struct sed_cmd *sed_cmd, const char *str, int *linenum, regex_t **regex)
-{
-	char *my_str = strdup(str);
-	int idx = 0;
-	char olddelimiter;
-	olddelimiter = sed_cmd->delimiter;
-	sed_cmd->delimiter = '/';
-
-	if (isdigit(my_str[idx])) {
-		do {
-			idx++;
-		} while (isdigit(my_str[idx]));
-		my_str[idx] = 0;
-		*linenum = atoi(my_str);
-	}
-	else if (my_str[idx] == '$') {
-		*linenum = -1;
-		idx++;
-	}
-	else if (my_str[idx] == '/') {
-		idx = index_of_next_unescaped_regexp_delim(sed_cmd, my_str, ++idx);
-		if (idx == -1)
-			error_msg_and_die("unterminated match expression");
-		my_str[idx] = '\0';
-		*regex = (regex_t *)xmalloc(sizeof(regex_t));
-		xregcomp(*regex, my_str+1, REG_NEWLINE);
-		idx++; /* so it points to the next character after the last '/' */
-	}
-	else {
-		error_msg("get_address: no address found in string\n"
-				"\t(you probably didn't check the string you passed me)");
-		idx = -1;
-	}
-
-	free(my_str);
-	sed_cmd->delimiter = olddelimiter;
-	return idx;
-}
-
-static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr)
-{
-	int oldidx, cflags = REG_NEWLINE;
-	char *match;
-	int idx = 0;
-	int j;
-
-	/*
-	 * the string that gets passed to this function should look like this:
-	 *    s/match/replace/gIp
-	 *    ||     |        |||
-	 *    mandatory       optional
-	 *
-	 *    (all three of the '/' slashes are mandatory)
-	 */
-
-	/* verify that the 's' is followed by something.  That something
-	 * (typically a 'slash') is now our regexp delimiter... */
-	if (!substr[++idx])
-		error_msg_and_die("bad format in substitution expression");
-	else
-	    sed_cmd->delimiter=substr[idx];
-
-	/* save the match string */
-	oldidx = idx+1;
-	idx = index_of_next_unescaped_regexp_delim(sed_cmd, substr, ++idx);
-	if (idx == -1)
-		error_msg_and_die("bad format in substitution expression");
-	match = xstrndup(substr + oldidx, idx - oldidx);
-
-	/* determine the number of back references in the match string */
-	/* Note: we compute this here rather than in the do_subst_command()
-	 * function to save processor time, at the expense of a little more memory
-	 * (4 bits) per sed_cmd */
-	
-	/* sed_cmd->num_backrefs = 0; */ /* XXX: not needed? --apparently not */ 
-	for (j = 0; match[j]; j++) {
-		/* GNU/POSIX sed does not save more than nine backrefs */
-		if (match[j] == '\\' && match[j+1] == '(' && sed_cmd->num_backrefs <= 9)
-			sed_cmd->num_backrefs++;
-	}
-
-	/* save the replacement string */
-	oldidx = idx+1;
-	idx = index_of_next_unescaped_regexp_delim(sed_cmd, substr, ++idx);
-	if (idx == -1)
-		error_msg_and_die("bad format in substitution expression");
-	sed_cmd->replace = xstrndup(substr + oldidx, idx - oldidx);
-
-	/* process the flags */
-	while (substr[++idx]) {
-		switch (substr[idx]) {
-			case 'g':
-				sed_cmd->sub_g = 1;
-				break;
-			case 'I':
-				cflags |= REG_ICASE;
-				break;
-			case 'p':
-				sed_cmd->sub_p = 1;
-				break;
-			default:
-				/* any whitespace or semicolon trailing after a s/// is ok */
-				if (strchr("; \t\v\n\r", substr[idx]))
-					goto out;
-				/* else */
-				error_msg_and_die("bad option in substitution expression");
-		}
-	}
-
-out:	
-	/* compile the match string into a regex */
-	sed_cmd->sub_match = (regex_t *)xmalloc(sizeof(regex_t));
-	xregcomp(sed_cmd->sub_match, match, cflags);
-	free(match);
-
-	return idx;
-}
-
-static int parse_edit_cmd(struct sed_cmd *sed_cmd, const char *editstr)
-{
-	int idx = 0;
-	int slashes_eaten = 0;
-	char *ptr; /* shorthand */
-
-	/*
-	 * the string that gets passed to this function should look like this:
-	 *
-	 *    need one of these 
-	 *    |
-	 *    |    this backslash (immediately following the edit command) is mandatory
-	 *    |    |
-	 *    [aic]\
-	 *    TEXT1\
-	 *    TEXT2\
-	 *    TEXTN
-	 *
-	 * as soon as we hit a TEXT line that has no trailing '\', we're done.
-	 * this means a command like:
-	 *
-	 * i\
-	 * INSERTME
-	 *
-	 * is a-ok.
-	 *
-	 */
-
-	if (editstr[1] != '\\' && (editstr[2] != '\n' || editstr[2] != '\r'))
-		error_msg_and_die("bad format in edit expression");
-
-	/* store the edit line text */
-	/* make editline big enough to accomodate the extra '\n' we will tack on
-	 * to the end */
-	sed_cmd->editline = xmalloc(strlen(&editstr[3]) + 2);
-	strcpy(sed_cmd->editline, &editstr[3]);
-	ptr = sed_cmd->editline;
-
-	/* now we need to go through * and: s/\\[\r\n]$/\n/g on the edit line */
-	while (ptr[idx]) {
-		while (ptr[idx] != '\\' || (ptr[idx+1] != '\n' && ptr[idx+1] != '\r')) {
-			idx++;
-			if (!ptr[idx]) {
-				goto out;
-			}
-		}
-		/* move the newline over the '\' before it (effectively eats the '\') */
-		memmove(&ptr[idx], &ptr[idx+1], strlen(&ptr[idx+1]));
-		ptr[strlen(ptr)-1] = 0;
-		slashes_eaten++;
-		/* substitue \r for \n if needed */
-		if (ptr[idx] == '\r')
-			ptr[idx] = '\n';
-	}
-
-out:
-	/* this accounts for discrepancies between the modified string and the
-	 * original string passed in to this function */
-	idx += slashes_eaten;
-
-	/* figure out if we need to add a newline */
-	if (ptr[idx-1] != '\n') {
-		ptr[idx] = '\n';
-		idx++;
-	}
-
-	/* terminate string */
-	ptr[idx]= 0;
-	/* adjust for opening 2 chars [aic]\ */
-	idx += 2;
-
-	return idx;
-}
-
-
-static int parse_file_cmd(struct sed_cmd *sed_cmd, const char *filecmdstr)
-{
-	int idx = 0;
-	int filenamelen = 0;
-
-	/*
-	 * the string that gets passed to this function should look like this:
-	 *    '[ ]filename'
-	 *      |  |
-	 *      |  a filename
-	 *      |
-	 *     optional whitespace
-
-	 *   re: the file to be read, the GNU manual says the following: "Note that
-	 *   if filename cannot be read, it is treated as if it were an empty file,
-	 *   without any error indication." Thus, all of the following commands are
-	 *   perfectly leagal:
-	 *
-	 *   sed -e '1r noexist'
-	 *   sed -e '1r ;'
-	 *   sed -e '1r'
-	 */
-
-	/* the file command may be followed by whitespace; move past it. */
-	while (isspace(filecmdstr[++idx]))
-		{ ; }
-		
-	/* the first non-whitespace we get is a filename. the filename ends when we
-	 * hit a normal sed command terminator or end of string */
-	filenamelen = strcspn(&filecmdstr[idx], "; \n\r\t\v\0");
-	sed_cmd->filename = xmalloc(filenamelen + 1);
-	safe_strncpy(sed_cmd->filename, &filecmdstr[idx], filenamelen + 1);
-
-	return idx + filenamelen;
-}
-
-
-static char *parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr)
-{
-	int idx = 0;
-
-	/* parse the command
-	 * format is: [addr][,addr]cmd
-	 *            |----||-----||-|
-	 *            part1 part2  part3
-	 */
-
-	/* first part (if present) is an address: either a number or a /regex/ */
-	if (isdigit(cmdstr[idx]) || cmdstr[idx] == '/')
-		idx = get_address(sed_cmd, cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
-
-	/* second part (if present) will begin with a comma */
-	if (cmdstr[idx] == ',')
-		idx += get_address(sed_cmd, &cmdstr[++idx], &sed_cmd->end_line, &sed_cmd->end_match);
-
-	/* last part (mandatory) will be a command */
-	if (cmdstr[idx] == '\0')
-		error_msg_and_die("missing command");
-	sed_cmd->cmd = cmdstr[idx];
-
-	/* if it was a single-letter command that takes no arguments (such as 'p'
-	 * or 'd') all we need to do is increment the index past that command */
-	if (strchr("pd", cmdstr[idx])) {
-		idx++;
-	}
-	/* handle (s)ubstitution command */
-	else if (sed_cmd->cmd == 's') {
-		idx += parse_subst_cmd(sed_cmd, &cmdstr[idx]);
-	}
-	/* handle edit cmds: (a)ppend, (i)nsert, and (c)hange */
-	else if (strchr("aic", sed_cmd->cmd)) {
-		if ((sed_cmd->end_line || sed_cmd->end_match) && sed_cmd->cmd != 'c')
-			error_msg_and_die("only a beginning address can be specified for edit commands");
-		idx += parse_edit_cmd(sed_cmd, &cmdstr[idx]);
-	}
-	/* handle file cmds: (r)ead */
-	else if (sed_cmd->cmd == 'r') {
-		if (sed_cmd->end_line || sed_cmd->end_match)
-			error_msg_and_die("Command only uses one address");
-		idx += parse_file_cmd(sed_cmd, &cmdstr[idx]);
-	}
-	else {
-		error_msg_and_die("invalid command");
-	}
-
-	/* give back whatever's left over */
-	return (char *)&cmdstr[idx];
-}
-
-static void add_cmd_str(const char *cmdstr)
-{
-	char *mystr = (char *)cmdstr;
-
-	do {
-
-		/* trim leading whitespace and semicolons */
-		memmove(mystr, &mystr[strspn(mystr, "; \n\r\t\v")], strlen(mystr));
-		/* if we ate the whole thing, that means there was just trailing
-		 * whitespace or a final / no-op semicolon. either way, get out */
-		if (strlen(mystr) == 0)
-			return;
-		/* if this is a comment, jump past it and keep going */
-		if (mystr[0] == '#') {
-			mystr = strpbrk(mystr, ";\n\r");
-			continue;
-		}
-		/* grow the array */
-		sed_cmds = xrealloc(sed_cmds, sizeof(struct sed_cmd) * (++ncmds));
-		/* zero new element */
-		memset(&sed_cmds[ncmds-1], 0, sizeof(struct sed_cmd));
-		/* load command string into new array element, get remainder */
-		mystr = parse_cmd_str(&sed_cmds[ncmds-1], mystr);
-
-	} while (mystr && strlen(mystr));
-}
-
-
-static void load_cmd_file(char *filename)
-{
-	FILE *cmdfile;
-	char *line;
-	char *nextline;
-
-	cmdfile = xfopen(filename, "r");
-
-	while ((line = get_line_from_file(cmdfile)) != NULL) {
-		/* if a line ends with '\' it needs the next line appended to it */
-		while (line[strlen(line)-2] == '\\' &&
-				(nextline = get_line_from_file(cmdfile)) != NULL) {
-			line = xrealloc(line, strlen(line) + strlen(nextline) + 1);
-			strcat(line, nextline);
-			free(nextline);
-		}
-		/* eat trailing newline (if any) --if I don't do this, edit commands
-		 * (aic) will print an extra newline */
-		chomp(line);
-		add_cmd_str(line);
-		free(line);
-	}
-}
-
-#define PIPE_MAGIC 0x7f
-#define PIPE_GROW 64  
-#define pipeputc(c) \
-{ if (pipeline[pipeline_idx] == PIPE_MAGIC) { \
-	pipeline = xrealloc(pipeline, pipeline_len+PIPE_GROW); \
-	memset(pipeline+pipeline_len, 0, PIPE_GROW); \
-	pipeline_len += PIPE_GROW; \
-	pipeline[pipeline_len-1] = PIPE_MAGIC; } \
-	pipeline[pipeline_idx++] = (c); }
-
-static void print_subst_w_backrefs(const char *line, const char *replace, 
-	regmatch_t *regmatch, char **pipeline_p, int *pipeline_idx_p, 
-	int *pipeline_len_p, int matches)
-{
-	char *pipeline = *pipeline_p;
-	int pipeline_idx = *pipeline_idx_p;
-	int pipeline_len = *pipeline_len_p;
-	int i;
-
-	/* go through the replacement string */
-	for (i = 0; replace[i]; i++) {
-		/* if we find a backreference (\1, \2, etc.) print the backref'ed * text */
-		if (replace[i] == '\\' && isdigit(replace[i+1])) {
-			int j;
-			char tmpstr[2];
-			int backref;
-			++i; /* i now indexes the backref number, instead of the leading slash */
-			tmpstr[0] = replace[i];
-			tmpstr[1] = 0;
-			backref = atoi(tmpstr);
-			/* print out the text held in regmatch[backref] */
-			if (backref <= matches && regmatch[backref].rm_so != -1)
-				for (j = regmatch[backref].rm_so; j < regmatch[backref].rm_eo; j++)
-					pipeputc(line[j]);
-		}
-
-		/* if we find a backslash escaped character, print the character */
-		else if (replace[i] == '\\') {
-			++i;
-			pipeputc(replace[i]);
-		}
-
-		/* if we find an unescaped '&' print out the whole matched text.
-		 * fortunately, regmatch[0] contains the indicies to the whole matched
-		 * expression (kinda seems like it was designed for just such a
-		 * purpose...) */
-		else if (replace[i] == '&' && replace[i-1] != '\\') {
-			int j;
-			for (j = regmatch[0].rm_so; j < regmatch[0].rm_eo; j++)
-				pipeputc(line[j]);
-		}
-		/* nothing special, just print this char of the replacement string to stdout */
-		else
-			pipeputc(replace[i]);
-	}
-	*pipeline_p = pipeline;
-	*pipeline_idx_p = pipeline_idx;
-	*pipeline_len_p = pipeline_len;
-}
-
-static int do_subst_command(const struct sed_cmd *sed_cmd, char **line)
-{
-	char *hackline = *line;
-	char *pipeline = 0;
-	int pipeline_idx = 0;
-	int pipeline_len = 0;
-	int altered = 0;
-	regmatch_t *regmatch = NULL;
-
-	/* we only proceed if the substitution 'search' expression matches */
-	if (regexec(sed_cmd->sub_match, hackline, 0, NULL, 0) == REG_NOMATCH)
-		return 0;
-
-	/* whaddaya know, it matched. get the number of back references */
-	regmatch = xmalloc(sizeof(regmatch_t) * (sed_cmd->num_backrefs+1));
-
-	/* allocate more PIPE_GROW bytes
-	   if replaced string is larger than original */
-	pipeline_len = strlen(hackline)+PIPE_GROW;
-	pipeline = xmalloc(pipeline_len);
-	memset(pipeline, 0, pipeline_len);
-	/* buffer magic */
-	pipeline[pipeline_len-1] = PIPE_MAGIC;
-
-	/* and now, as long as we've got a line to try matching and if we can match
-	 * the search string, we make substitutions */
-	while ((*hackline || !altered) && (regexec(sed_cmd->sub_match, hackline,
-					sed_cmd->num_backrefs+1, regmatch, 0) != REG_NOMATCH) ) {
-		int i;
-
-		/* print everything before the match */
-		for (i = 0; i < regmatch[0].rm_so; i++)
-			pipeputc(hackline[i]);
-
-		/* then print the substitution string */
-		print_subst_w_backrefs(hackline, sed_cmd->replace, regmatch, 
-				&pipeline, &pipeline_idx, &pipeline_len,
-				sed_cmd->num_backrefs);
-
-		/* advance past the match */
-		hackline += regmatch[0].rm_eo;
-		/* flag that something has changed */
-		altered++;
-
-		/* if we're not doing this globally, get out now */
-		if (!sed_cmd->sub_g)
-			break;
-	}
-
-	for (; *hackline; hackline++) pipeputc(*hackline);
-	if (pipeline[pipeline_idx] == PIPE_MAGIC) pipeline[pipeline_idx] = 0;
-
-	/* cleanup */
-	free(regmatch);
-
-	free(*line);
-	*line = pipeline;
-	return altered;
-}
-
-
-static void process_file(FILE *file)
-{
-	char *line = NULL;
-	static int linenum = 0; /* GNU sed does not restart counting lines at EOF */
-	unsigned int still_in_range = 0;
-	int altered;
-	int i;
-
-	/* go through every line in the file */
-	while ((line = get_line_from_file(file)) != NULL) {
-
-		chomp(line);
-		linenum++;
-		altered = 0;
-
-		/* for every line, go through all the commands */
-		for (i = 0; i < ncmds; i++) {
-
-
-			/*
-			 * entry point into sedding...
-			 */
-			if (
-					/* no range necessary */
-					(sed_cmds[i].beg_line == 0 && sed_cmds[i].end_line == 0 &&
-					 sed_cmds[i].beg_match == NULL &&
-					 sed_cmds[i].end_match == NULL) ||
-					/* this line number is the first address we're looking for */
-					(sed_cmds[i].beg_line && (sed_cmds[i].beg_line == linenum)) ||
-					/* this line matches our first address regex */
-					(sed_cmds[i].beg_match && (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0)) ||
-					/* we are currently within the beginning & ending address range */
-					still_in_range
-			   ) {
-
-				/*
-				 * actual sedding
-				 */
-				switch (sed_cmds[i].cmd) {
-
-					case 'p':
-						puts(line);
-						break;
-
-					case 'd':
-						altered++;
-						break;
-
-					case 's':
-
-						/*
-						 * Some special cases for 's' printing to make it compliant with
-						 * GNU sed printing behavior (aka "The -n | s///p Matrix"):
-						 *
-						 *    -n ONLY = never print anything regardless of any successful
-						 *    substitution
-						 *
-						 *    s///p ONLY = always print successful substitutions, even if
-						 *    the line is going to be printed anyway (line will be printed
-						 *    twice).
-						 *
-						 *    -n AND s///p = print ONLY a successful substitution ONE TIME;
-						 *    no other lines are printed - this is the reason why the 'p'
-						 *    flag exists in the first place.
-						 */
-
-						/* if the user specified that they didn't want anything printed (i.e., a -n
-						 * flag and no 'p' flag after the s///), then there's really no point doing
-						 * anything here. */
-						if (be_quiet && !sed_cmds[i].sub_p)
-							break;
-
-						/* we print the line once, unless we were told to be quiet */
-						if (!be_quiet)
-							altered |= do_subst_command(&sed_cmds[i], &line);
-
-						/* we also print the line if we were given the 'p' flag
-						 * (this is quite possibly the second printing) */
-						if (sed_cmds[i].sub_p)
-							altered |= do_subst_command(&sed_cmds[i], &line);
-						if (altered && (i+1 >= ncmds || sed_cmds[i+1].cmd != 's'))
-							puts(line);
-
-						break;
-
-					case 'a':
-						puts(line);
-						fputs(sed_cmds[i].editline, stdout);
-						altered++;
-						break;
-
-					case 'i':
-						fputs(sed_cmds[i].editline, stdout);
-						break;
-
-					case 'c':
-						/* single-address case */
-						if (sed_cmds[i].end_match == NULL && sed_cmds[i].end_line == 0) {
-							fputs(sed_cmds[i].editline, stdout);
-						}
-						/* multi-address case */
-						else {
-							/* matching text */
-							if (sed_cmds[i].end_match && (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0))
-								fputs(sed_cmds[i].editline, stdout);
-							/* matching line numbers */
-							if (sed_cmds[i].end_line > 0 && sed_cmds[i].end_line == linenum)
-								fputs(sed_cmds[i].editline, stdout);
-						}
-						altered++;
-
-						break;
-
-					case 'r': {
-								  FILE *outfile;
-								  puts(line);
-								  outfile = fopen(sed_cmds[i].filename, "r");
-								  if (outfile)
-									  print_file(outfile);
-								  /* else if we couldn't open the output file,
-								   * no biggie, just don't print anything */
-								  altered++;
-							  }
-							  break;
-				}
-
-				/*
-				 * exit point from sedding...
-				 */
-				if (
-					/* this is a single-address command or... */
-					(sed_cmds[i].end_line == 0 && sed_cmds[i].end_match == NULL) || (
-						/* we were in the middle of our address range (this
-						 * isn't the first time through) and.. */
-						(still_in_range == 1) && (
-							/* this line number is the last address we're looking for or... */
-							(sed_cmds[i].end_line && (sed_cmds[i].end_line == linenum)) ||
-							/* this line matches our last address regex */
-							(sed_cmds[i].end_match && (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0))
-						)
-					)
-				) {
-					/* we're out of our address range */
-					still_in_range = 0;
-				}
-
-				/* didn't hit the exit? then we're still in the middle of an address range */
-				else {
-					still_in_range = 1;
-				}
-			}
-		}
-
-		/* we will print the line unless we were told to be quiet or if the
-		 * line was altered (via a 'd'elete or 's'ubstitution), in which case
-		 * the altered line was already printed */
-		if (!be_quiet && !altered)
-			puts(line);
-
-		free(line);
-	}
-}
-
-extern int sed_main(int argc, char **argv)
-{
-	int opt;
-
-#ifdef BB_FEATURE_CLEAN_UP
-	/* destroy command strings on exit */
-	if (atexit(destroy_cmd_strs) == -1)
-		perror_msg_and_die("atexit");
-#endif
-
-	/* do normal option parsing */
-	while ((opt = getopt(argc, argv, "ne:f:")) > 0) {
-		switch (opt) {
-			case 'n':
-				be_quiet++;
-				break;
-			case 'e':
-				add_cmd_str(optarg);
-				break;
-			case 'f': 
-				load_cmd_file(optarg);
-				break;
-			default:
-				show_usage();
-		}
-	}
-
-	/* if we didn't get a pattern from a -e and no command file was specified,
-	 * argv[optind] should be the pattern. no pattern, no worky */
-	if (ncmds == 0) {
-		if (argv[optind] == NULL)
-			show_usage();
-		else {
-			add_cmd_str(argv[optind]);
-			optind++;
-		}
-	}
-
-
-	/* argv[(optind)..(argc-1)] should be names of file to process. If no
-	 * files were specified or '-' was specified, take input from stdin.
-	 * Otherwise, we process all the files specified. */
-	if (argv[optind] == NULL || (strcmp(argv[optind], "-") == 0)) {
-		process_file(stdin);
-	}
-	else {
-		int i;
-		FILE *file;
-		for (i = optind; i < argc; i++) {
-			file = fopen(argv[i], "r");
-			if (file == NULL) {
-				perror_msg("%s", argv[i]);
-			} else {
-				process_file(file);
-				fclose(file);
-			}
-		}
-	}
-	
-	return 0;
-}