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diff --git a/i/pc104/initrd/conf/busybox/editors/sed.c b/i/pc104/initrd/conf/busybox/editors/sed.c
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+/* vi: set sw=4 ts=4: */
+/*
+ * sed.c - very minimalist version of sed
+ *
+ * Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley
+ * Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org>
+ * Copyright (C) 2002 Matt Kraai
+ * Copyright (C) 2003 by Glenn McGrath <bug1@iinet.net.au>
+ * Copyright (C) 2003,2004 by Rob Landley <rob@landley.net>
+ *
+ * MAINTAINER: Rob Landley <rob@landley.net>
+ *
+ * Licensed under GPL version 2, see file LICENSE in this tarball for details.
+ */
+
+/* Code overview.
+
+ Files are laid out to avoid unnecessary function declarations. So for
+ example, every function add_cmd calls occurs before add_cmd in this file.
+
+ add_cmd() is called on each line of sed command text (from a file or from
+ the command line). It calls get_address() and parse_cmd_args(). The
+ resulting sed_cmd_t structures are appended to a linked list
+ (bbg.sed_cmd_head/bbg.sed_cmd_tail).
+
+ add_input_file() adds a FILE * to the list of input files. We need to
+ know all input sources ahead of time to find the last line for the $ match.
+
+ process_files() does actual sedding, reading data lines from each input FILE *
+ (which could be stdin) and applying the sed command list (sed_cmd_head) to
+ each of the resulting lines.
+
+ sed_main() is where external code calls into this, with a command line.
+*/
+
+
+/*
+ Supported features and commands in this version of sed:
+
+ - comments ('#')
+ - address matching: num|/matchstr/[,num|/matchstr/|$]command
+ - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags)
+ - edit commands: (a)ppend, (i)nsert, (c)hange
+ - file commands: (r)ead
+ - backreferences in substitution expressions (\0, \1, \2...\9)
+ - grouped commands: {cmd1;cmd2}
+ - transliteration (y/source-chars/dest-chars/)
+ - pattern space hold space storing / swapping (g, h, x)
+ - labels / branching (: label, b, t, T)
+
+ (Note: Specifying an address (range) to match is *optional*; commands
+ default to the whole pattern space if no specific address match was
+ requested.)
+
+ Todo:
+ - Create a wrapper around regex to make libc's regex conform with sed
+
+ Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
+*/
+
+#include "busybox.h"
+#include "xregex.h"
+
+/* Each sed command turns into one of these structures. */
+typedef struct sed_cmd_s {
+ /* Ordered by alignment requirements: currently 36 bytes on x86 */
+ struct sed_cmd_s *next; /* Next command (linked list, NULL terminated) */
+
+ /* address storage */
+ regex_t *beg_match; /* sed -e '/match/cmd' */
+ regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
+ regex_t *sub_match; /* For 's/sub_match/string/' */
+ int beg_line; /* 'sed 1p' 0 == apply commands to all lines */
+ int end_line; /* 'sed 1,3p' 0 == one line only. -1 = last line ($) */
+
+ FILE *sw_file; /* File (sw) command writes to, -1 for none. */
+ char *string; /* Data string for (saicytb) commands. */
+
+ unsigned short which_match; /* (s) Which match to replace (0 for all) */
+
+ /* Bitfields (gcc won't group them if we don't) */
+ unsigned invert:1; /* the '!' after the address */
+ unsigned in_match:1; /* Next line also included in match? */
+ unsigned sub_p:1; /* (s) print option */
+
+ char sw_last_char; /* Last line written by (sw) had no '\n' */
+
+ /* GENERAL FIELDS */
+ char cmd; /* The command char: abcdDgGhHilnNpPqrstwxy:={} */
+} sed_cmd_t;
+
+static const char semicolon_whitespace[] = "; \n\r\t\v";
+
+struct sed_globals {
+ /* options */
+ int be_quiet, regex_type;
+ FILE *nonstdout;
+ char *outname, *hold_space;
+
+ /* List of input files */
+ int input_file_count, current_input_file;
+ FILE **input_file_list;
+
+ regmatch_t regmatch[10];
+ regex_t *previous_regex_ptr;
+
+ /* linked list of sed commands */
+ sed_cmd_t sed_cmd_head, *sed_cmd_tail;
+
+ /* Linked list of append lines */
+ llist_t *append_head;
+
+ char *add_cmd_line;
+
+ struct pipeline {
+ char *buf; /* Space to hold string */
+ int idx; /* Space used */
+ int len; /* Space allocated */
+ } pipeline;
+} bbg;
+
+
+#if ENABLE_FEATURE_CLEAN_UP
+static void sed_free_and_close_stuff(void)
+{
+ sed_cmd_t *sed_cmd = bbg.sed_cmd_head.next;
+
+ llist_free(bbg.append_head, free);
+
+ while (sed_cmd) {
+ sed_cmd_t *sed_cmd_next = sed_cmd->next;
+
+ if (sed_cmd->sw_file)
+ xprint_and_close_file(sed_cmd->sw_file);
+
+ if (sed_cmd->beg_match) {
+ regfree(sed_cmd->beg_match);
+ free(sed_cmd->beg_match);
+ }
+ if (sed_cmd->end_match) {
+ regfree(sed_cmd->end_match);
+ free(sed_cmd->end_match);
+ }
+ if (sed_cmd->sub_match) {
+ regfree(sed_cmd->sub_match);
+ free(sed_cmd->sub_match);
+ }
+ free(sed_cmd->string);
+ free(sed_cmd);
+ sed_cmd = sed_cmd_next;
+ }
+
+ if (bbg.hold_space) free(bbg.hold_space);
+
+ while (bbg.current_input_file < bbg.input_file_count)
+ fclose(bbg.input_file_list[bbg.current_input_file++]);
+}
+#else
+void sed_free_and_close_stuff(void);
+#endif
+
+/* If something bad happens during -i operation, delete temp file */
+
+static void cleanup_outname(void)
+{
+ if (bbg.outname) unlink(bbg.outname);
+}
+
+/* strdup, replacing "\n" with '\n', and "\delimiter" with 'delimiter' */
+
+static void parse_escapes(char *dest, const char *string, int len, char from, char to)
+{
+ int i = 0;
+
+ while (i < len) {
+ if (string[i] == '\\') {
+ if (!to || string[i+1] == from) {
+ *dest++ = to ? to : string[i+1];
+ i += 2;
+ continue;
+ }
+ *dest++ = string[i++];
+ }
+ *dest++ = string[i++];
+ }
+ *dest = 0;
+}
+
+static char *copy_parsing_escapes(const char *string, int len)
+{
+ char *dest = xmalloc(len + 1);
+
+ parse_escapes(dest, string, len, 'n', '\n');
+ return dest;
+}
+
+
+/*
+ * 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 preceded by
+ * a backslash ('\'). A negative delimiter disables square bracket checking.
+ */
+static int index_of_next_unescaped_regexp_delim(int delimiter, const char *str)
+{
+ int bracket = -1;
+ int escaped = 0;
+ int idx = 0;
+ char ch;
+
+ if (delimiter < 0) {
+ bracket--;
+ delimiter = -delimiter;
+ }
+
+ for (; (ch = str[idx]); idx++) {
+ if (bracket >= 0) {
+ if (ch == ']' && !(bracket == idx - 1 || (bracket == idx - 2
+ && str[idx - 1] == '^')))
+ bracket = -1;
+ } else if (escaped)
+ escaped = 0;
+ else if (ch == '\\')
+ escaped = 1;
+ else if (bracket == -1 && ch == '[')
+ bracket = idx;
+ else if (ch == delimiter)
+ return idx;
+ }
+
+ /* if we make it to here, we've hit the end of the string */
+ bb_error_msg_and_die("unmatched '%c'", delimiter);
+}
+
+/*
+ * Returns the index of the third delimiter
+ */
+static int parse_regex_delim(const char *cmdstr, char **match, char **replace)
+{
+ const char *cmdstr_ptr = cmdstr;
+ char delimiter;
+ int idx = 0;
+
+ /* verify that the 's' or 'y' is followed by something. That something
+ * (typically a 'slash') is now our regexp delimiter... */
+ if (*cmdstr == '\0')
+ bb_error_msg_and_die("bad format in substitution expression");
+ delimiter = *cmdstr_ptr++;
+
+ /* save the match string */
+ idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr);
+ *match = copy_parsing_escapes(cmdstr_ptr, idx);
+
+ /* save the replacement string */
+ cmdstr_ptr += idx + 1;
+ idx = index_of_next_unescaped_regexp_delim(-delimiter, cmdstr_ptr);
+ *replace = copy_parsing_escapes(cmdstr_ptr, idx);
+
+ return ((cmdstr_ptr - cmdstr) + idx);
+}
+
+/*
+ * returns the index in the string just past where the address ends.
+ */
+static int get_address(const char *my_str, int *linenum, regex_t ** regex)
+{
+ const char *pos = my_str;
+
+ if (isdigit(*my_str)) {
+ *linenum = strtol(my_str, (char**)&pos, 10);
+ /* endstr shouldnt ever equal NULL */
+ } else if (*my_str == '$') {
+ *linenum = -1;
+ pos++;
+ } else if (*my_str == '/' || *my_str == '\\') {
+ int next;
+ char delimiter;
+ char *temp;
+
+ delimiter = '/';
+ if (*my_str == '\\') delimiter = *++pos;
+ next = index_of_next_unescaped_regexp_delim(delimiter, ++pos);
+ temp = copy_parsing_escapes(pos, next);
+ *regex = xmalloc(sizeof(regex_t));
+ xregcomp(*regex, temp, bbg.regex_type|REG_NEWLINE);
+ free(temp);
+ /* Move position to next character after last delimiter */
+ pos += (next+1);
+ }
+ return pos - my_str;
+}
+
+/* Grab a filename. Whitespace at start is skipped, then goes to EOL. */
+static int parse_file_cmd(sed_cmd_t *sed_cmd, const char *filecmdstr, char **retval)
+{
+ int start = 0, idx, hack = 0;
+
+ /* Skip whitespace, then grab filename to end of line */
+ while (isspace(filecmdstr[start]))
+ start++;
+ idx = start;
+ while (filecmdstr[idx] && filecmdstr[idx] != '\n')
+ idx++;
+
+ /* If lines glued together, put backslash back. */
+ if (filecmdstr[idx] == '\n')
+ hack = 1;
+ if (idx == start)
+ bb_error_msg_and_die("empty filename");
+ *retval = xstrndup(filecmdstr+start, idx-start+hack+1);
+ if (hack)
+ (*retval)[idx] = '\\';
+
+ return idx;
+}
+
+static int parse_subst_cmd(sed_cmd_t *sed_cmd, const char *substr)
+{
+ int cflags = bbg.regex_type;
+ char *match;
+ int idx;
+
+ /*
+ * A substitution command should look something like this:
+ * s/match/replace/ #gIpw
+ * || | |||
+ * mandatory optional
+ */
+ idx = parse_regex_delim(substr, &match, &sed_cmd->string);
+
+ /* 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 */
+
+ /* process the flags */
+
+ sed_cmd->which_match = 1;
+ while (substr[++idx]) {
+ /* Parse match number */
+ if (isdigit(substr[idx])) {
+ if (match[0] != '^') {
+ /* Match 0 treated as all, multiple matches we take the last one. */
+ const char *pos = substr + idx;
+/* FIXME: error check? */
+ sed_cmd->which_match = (unsigned short)strtol(substr+idx, (char**) &pos, 10);
+ idx = pos - substr;
+ }
+ continue;
+ }
+ /* Skip spaces */
+ if (isspace(substr[idx])) continue;
+
+ switch (substr[idx]) {
+ /* Replace all occurrences */
+ case 'g':
+ if (match[0] != '^') sed_cmd->which_match = 0;
+ break;
+ /* Print pattern space */
+ case 'p':
+ sed_cmd->sub_p = 1;
+ break;
+ /* Write to file */
+ case 'w':
+ {
+ char *temp;
+ idx += parse_file_cmd(sed_cmd, substr+idx, &temp);
+ break;
+ }
+ /* Ignore case (gnu exension) */
+ case 'I':
+ cflags |= REG_ICASE;
+ break;
+ /* Comment */
+ case '#':
+ while (substr[++idx]) /*skip all*/;
+ /* Fall through */
+ /* End of command */
+ case ';':
+ case '}':
+ goto out;
+ default:
+ bb_error_msg_and_die("bad option in substitution expression");
+ }
+ }
+out:
+ /* compile the match string into a regex */
+ if (*match != '\0') {
+ /* If match is empty, we use last regex used at runtime */
+ sed_cmd->sub_match = xmalloc(sizeof(regex_t));
+ xregcomp(sed_cmd->sub_match, match, cflags);
+ }
+ free(match);
+
+ return idx;
+}
+
+/*
+ * Process the commands arguments
+ */
+static const char *parse_cmd_args(sed_cmd_t *sed_cmd, const char *cmdstr)
+{
+ /* handle (s)ubstitution command */
+ if (sed_cmd->cmd == 's')
+ cmdstr += parse_subst_cmd(sed_cmd, cmdstr);
+ /* 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')
+ bb_error_msg_and_die
+ ("only a beginning address can be specified for edit commands");
+ for (;;) {
+ if (*cmdstr == '\n' || *cmdstr == '\\') {
+ cmdstr++;
+ break;
+ } else if (isspace(*cmdstr))
+ cmdstr++;
+ else
+ break;
+ }
+ sed_cmd->string = xstrdup(cmdstr);
+ parse_escapes(sed_cmd->string, sed_cmd->string, strlen(cmdstr), 0, 0);
+ cmdstr += strlen(cmdstr);
+ /* handle file cmds: (r)ead */
+ } else if (strchr("rw", sed_cmd->cmd)) {
+ if (sed_cmd->end_line || sed_cmd->end_match)
+ bb_error_msg_and_die("command only uses one address");
+ cmdstr += parse_file_cmd(sed_cmd, cmdstr, &sed_cmd->string);
+ if (sed_cmd->cmd == 'w') {
+ sed_cmd->sw_file = xfopen(sed_cmd->string, "w");
+ sed_cmd->sw_last_char = '\n';
+ }
+ /* handle branch commands */
+ } else if (strchr(":btT", sed_cmd->cmd)) {
+ int length;
+
+ cmdstr = skip_whitespace(cmdstr);
+ length = strcspn(cmdstr, semicolon_whitespace);
+ if (length) {
+ sed_cmd->string = xstrndup(cmdstr, length);
+ cmdstr += length;
+ }
+ }
+ /* translation command */
+ else if (sed_cmd->cmd == 'y') {
+ char *match, *replace;
+ int i = cmdstr[0];
+
+ cmdstr += parse_regex_delim(cmdstr, &match, &replace)+1;
+ /* \n already parsed, but \delimiter needs unescaping. */
+ parse_escapes(match, match, strlen(match), i, i);
+ parse_escapes(replace, replace, strlen(replace), i, i);
+
+ sed_cmd->string = xzalloc((strlen(match) + 1) * 2);
+ for (i = 0; match[i] && replace[i]; i++) {
+ sed_cmd->string[i*2] = match[i];
+ sed_cmd->string[i*2+1] = replace[i];
+ }
+ free(match);
+ free(replace);
+ }
+ /* if it wasnt a single-letter command that takes no arguments
+ * then it must be an invalid command.
+ */
+ else if (strchr("dDgGhHlnNpPqx={}", sed_cmd->cmd) == 0) {
+ bb_error_msg_and_die("unsupported command %c", sed_cmd->cmd);
+ }
+
+ /* give back whatever's left over */
+ return cmdstr;
+}
+
+
+/* Parse address+command sets, skipping comment lines. */
+
+static void add_cmd(const char *cmdstr)
+{
+ sed_cmd_t *sed_cmd;
+ int temp;
+
+ /* Append this line to any unfinished line from last time. */
+ if (bbg.add_cmd_line) {
+ char *tp = xasprintf("%s\n%s", bbg.add_cmd_line, cmdstr);
+ free(bbg.add_cmd_line);
+ bbg.add_cmd_line = tp;
+ }
+
+ /* If this line ends with backslash, request next line. */
+ temp = strlen(cmdstr);
+ if (temp && cmdstr[temp-1] == '\\') {
+ if (!bbg.add_cmd_line)
+ bbg.add_cmd_line = xstrdup(cmdstr);
+ bbg.add_cmd_line[temp-1] = 0;
+ return;
+ }
+
+ /* Loop parsing all commands in this line. */
+ while (*cmdstr) {
+ /* Skip leading whitespace and semicolons */
+ cmdstr += strspn(cmdstr, semicolon_whitespace);
+
+ /* If no more commands, exit. */
+ if (!*cmdstr) break;
+
+ /* if this is a comment, jump past it and keep going */
+ if (*cmdstr == '#') {
+ /* "#n" is the same as using -n on the command line */
+ if (cmdstr[1] == 'n')
+ bbg.be_quiet++;
+ cmdstr = strpbrk(cmdstr, "\n\r");
+ if (!cmdstr) break;
+ continue;
+ }
+
+ /* parse the command
+ * format is: [addr][,addr][!]cmd
+ * |----||-----||-|
+ * part1 part2 part3
+ */
+
+ sed_cmd = xzalloc(sizeof(sed_cmd_t));
+
+ /* first part (if present) is an address: either a '$', a number or a /regex/ */
+ cmdstr += get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
+
+ /* second part (if present) will begin with a comma */
+ if (*cmdstr == ',') {
+ int idx;
+
+ cmdstr++;
+ idx = get_address(cmdstr, &sed_cmd->end_line, &sed_cmd->end_match);
+ if (!idx)
+ bb_error_msg_and_die("no address after comma");
+ cmdstr += idx;
+ }
+
+ /* skip whitespace before the command */
+ cmdstr = skip_whitespace(cmdstr);
+
+ /* Check for inversion flag */
+ if (*cmdstr == '!') {
+ sed_cmd->invert = 1;
+ cmdstr++;
+
+ /* skip whitespace before the command */
+ cmdstr = skip_whitespace(cmdstr);
+ }
+
+ /* last part (mandatory) will be a command */
+ if (!*cmdstr)
+ bb_error_msg_and_die("missing command");
+ sed_cmd->cmd = *(cmdstr++);
+ cmdstr = parse_cmd_args(sed_cmd, cmdstr);
+
+ /* Add the command to the command array */
+ bbg.sed_cmd_tail->next = sed_cmd;
+ bbg.sed_cmd_tail = bbg.sed_cmd_tail->next;
+ }
+
+ /* If we glued multiple lines together, free the memory. */
+ free(bbg.add_cmd_line);
+ bbg.add_cmd_line = NULL;
+}
+
+/* Append to a string, reallocating memory as necessary. */
+
+#define PIPE_GROW 64
+
+static void pipe_putc(char c)
+{
+ if (bbg.pipeline.idx == bbg.pipeline.len) {
+ bbg.pipeline.buf = xrealloc(bbg.pipeline.buf,
+ bbg.pipeline.len + PIPE_GROW);
+ bbg.pipeline.len += PIPE_GROW;
+ }
+ bbg.pipeline.buf[bbg.pipeline.idx++] = c;
+}
+
+static void do_subst_w_backrefs(char *line, char *replace)
+{
+ int i,j;
+
+ /* 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] == '\\') {
+ unsigned backref = replace[++i] - '0';
+ if (backref <= 9) {
+ /* print out the text held in bbg.regmatch[backref] */
+ if (bbg.regmatch[backref].rm_so != -1) {
+ j = bbg.regmatch[backref].rm_so;
+ while (j < bbg.regmatch[backref].rm_eo)
+ pipe_putc(line[j++]);
+ }
+ continue;
+ }
+ /* I _think_ it is impossible to get '\' to be
+ * the last char in replace string. Thus we dont check
+ * for replace[i] == NUL. (counterexample anyone?) */
+ /* if we find a backslash escaped character, print the character */
+ pipe_putc(replace[i]);
+ continue;
+ }
+ /* if we find an unescaped '&' print out the whole matched text. */
+ if (replace[i] == '&') {
+ j = bbg.regmatch[0].rm_so;
+ while (j < bbg.regmatch[0].rm_eo)
+ pipe_putc(line[j++]);
+ continue;
+ }
+ /* Otherwise just output the character. */
+ pipe_putc(replace[i]);
+ }
+}
+
+static int do_subst_command(sed_cmd_t *sed_cmd, char **line)
+{
+ char *oldline = *line;
+ int altered = 0;
+ int match_count = 0;
+ regex_t *current_regex;
+
+ /* Handle empty regex. */
+ if (sed_cmd->sub_match == NULL) {
+ current_regex = bbg.previous_regex_ptr;
+ if (!current_regex)
+ bb_error_msg_and_die("no previous regexp");
+ } else
+ bbg.previous_regex_ptr = current_regex = sed_cmd->sub_match;
+
+ /* Find the first match */
+ if (REG_NOMATCH == regexec(current_regex, oldline, 10, bbg.regmatch, 0))
+ return 0;
+
+ /* Initialize temporary output buffer. */
+ bbg.pipeline.buf = xmalloc(PIPE_GROW);
+ bbg.pipeline.len = PIPE_GROW;
+ bbg.pipeline.idx = 0;
+
+ /* Now loop through, substituting for matches */
+ do {
+ int i;
+
+ /* Work around bug in glibc regexec, demonstrated by:
+ echo " a.b" | busybox sed 's [^ .]* x g'
+ The match_count check is so not to break
+ echo "hi" | busybox sed 's/^/!/g' */
+ if (!bbg.regmatch[0].rm_so && !bbg.regmatch[0].rm_eo && match_count) {
+ pipe_putc(*oldline++);
+ continue;
+ }
+
+ match_count++;
+
+ /* If we aren't interested in this match, output old line to
+ end of match and continue */
+ if (sed_cmd->which_match && sed_cmd->which_match != match_count) {
+ for (i = 0; i < bbg.regmatch[0].rm_eo; i++)
+ pipe_putc(*oldline++);
+ continue;
+ }
+
+ /* print everything before the match */
+ for (i = 0; i < bbg.regmatch[0].rm_so; i++)
+ pipe_putc(oldline[i]);
+
+ /* then print the substitution string */
+ do_subst_w_backrefs(oldline, sed_cmd->string);
+
+ /* advance past the match */
+ oldline += bbg.regmatch[0].rm_eo;
+ /* flag that something has changed */
+ altered++;
+
+ /* if we're not doing this globally, get out now */
+ if (sed_cmd->which_match) break;
+ } while (*oldline && (regexec(current_regex, oldline, 10, bbg.regmatch, 0) != REG_NOMATCH));
+
+ /* Copy rest of string into output pipeline */
+
+ while (*oldline)
+ pipe_putc(*oldline++);
+ pipe_putc(0);
+
+ free(*line);
+ *line = bbg.pipeline.buf;
+ return altered;
+}
+
+/* Set command pointer to point to this label. (Does not handle null label.) */
+static sed_cmd_t *branch_to(char *label)
+{
+ sed_cmd_t *sed_cmd;
+
+ for (sed_cmd = bbg.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
+ if (sed_cmd->cmd == ':' && sed_cmd->string && !strcmp(sed_cmd->string, label)) {
+ return sed_cmd;
+ }
+ }
+ bb_error_msg_and_die("can't find label for jump to '%s'", label);
+}
+
+static void append(char *s)
+{
+ llist_add_to_end(&bbg.append_head, xstrdup(s));
+}
+
+static void flush_append(void)
+{
+ char *data;
+
+ /* Output appended lines. */
+ while ((data = (char *)llist_pop(&bbg.append_head))) {
+ fprintf(bbg.nonstdout, "%s\n", data);
+ free(data);
+ }
+}
+
+static void add_input_file(FILE *file)
+{
+ bbg.input_file_list = xrealloc(bbg.input_file_list,
+ (bbg.input_file_count + 1) * sizeof(FILE *));
+ bbg.input_file_list[bbg.input_file_count++] = file;
+}
+
+/* Get next line of input from bbg.input_file_list, flushing append buffer and
+ * noting if we ran out of files without a newline on the last line we read.
+ */
+enum {
+ NO_EOL_CHAR = 1,
+ LAST_IS_NUL = 2,
+};
+static char *get_next_line(char *gets_char)
+{
+ char *temp = NULL;
+ int len;
+ char gc;
+
+ flush_append();
+
+ /* will be returned if last line in the file
+ * doesn't end with either '\n' or '\0' */
+ gc = NO_EOL_CHAR;
+ while (bbg.current_input_file < bbg.input_file_count) {
+ FILE *fp = bbg.input_file_list[bbg.current_input_file];
+ /* Read line up to a newline or NUL byte, inclusive,
+ * return malloc'ed char[]. length of the chunk read
+ * is stored in len. NULL if EOF/error */
+ temp = bb_get_chunk_from_file(fp, &len);
+ if (temp) {
+ /* len > 0 here, it's ok to do temp[len-1] */
+ char c = temp[len-1];
+ if (c == '\n' || c == '\0') {
+ temp[len-1] = '\0';
+ gc = c;
+ if (c == '\0') {
+ int ch = fgetc(fp);
+ if (ch != EOF)
+ ungetc(ch, fp);
+ else
+ gc = LAST_IS_NUL;
+ }
+ }
+ /* else we put NO_EOL_CHAR into *gets_char */
+ break;
+
+ /* NB: I had the idea of peeking next file(s) and returning
+ * NO_EOL_CHAR only if it is the *last* non-empty
+ * input file. But there is a case where this won't work:
+ * file1: "a woo\nb woo"
+ * file2: "c no\nd no"
+ * sed -ne 's/woo/bang/p' input1 input2 => "a bang\nb bang"
+ * (note: *no* newline after "b bang"!) */
+ }
+ /* Close this file and advance to next one */
+ fclose(fp);
+ bbg.current_input_file++;
+ }
+ *gets_char = gc;
+ return temp;
+}
+
+/* Output line of text. */
+/* Note:
+ * The tricks with NO_EOL_CHAR and last_puts_char are there to emulate gnu sed.
+ * Without them, we had this:
+ * echo -n thingy >z1
+ * echo -n again >z2
+ * >znull
+ * sed "s/i/z/" z1 z2 znull | hexdump -vC
+ * output:
+ * gnu sed 4.1.5:
+ * 00000000 74 68 7a 6e 67 79 0a 61 67 61 7a 6e |thzngy.agazn|
+ * bbox:
+ * 00000000 74 68 7a 6e 67 79 61 67 61 7a 6e |thzngyagazn|
+ */
+static void puts_maybe_newline(char *s, FILE *file, char *last_puts_char, char last_gets_char)
+{
+ char lpc = *last_puts_char;
+
+ /* Need to insert a '\n' between two files because first file's
+ * last line wasn't terminated? */
+ if (lpc != '\n' && lpc != '\0') {
+ fputc('\n', file);
+ lpc = '\n';
+ }
+ fputs(s, file);
+
+ /* 'x' - just something which is not '\n', '\0' or NO_EOL_CHAR */
+ if (s[0])
+ lpc = 'x';
+
+ /* had trailing '\0' and it was last char of file? */
+ if (last_gets_char == LAST_IS_NUL) {
+ fputc('\0', file);
+ lpc = 'x'; /* */
+ } else
+ /* had trailing '\n' or '\0'? */
+ if (last_gets_char != NO_EOL_CHAR) {
+ fputc(last_gets_char, file);
+ lpc = last_gets_char;
+ }
+
+ if (ferror(file)) {
+ xfunc_error_retval = 4; /* It's what gnu sed exits with... */
+ bb_error_msg_and_die(bb_msg_write_error);
+ }
+ *last_puts_char = lpc;
+}
+
+#define sed_puts(s, n) (puts_maybe_newline(s, bbg.nonstdout, &last_puts_char, n))
+
+/* Process all the lines in all the files */
+
+static void process_files(void)
+{
+ char *pattern_space, *next_line;
+ int linenum = 0;
+ char last_puts_char = '\n';
+ char last_gets_char, next_gets_char;
+ sed_cmd_t *sed_cmd;
+ int substituted;
+
+ /* Prime the pump */
+ next_line = get_next_line(&next_gets_char);
+
+ /* go through every line in each file */
+again:
+ substituted = 0;
+
+ /* Advance to next line. Stop if out of lines. */
+ pattern_space = next_line;
+ if (!pattern_space) return;
+ last_gets_char = next_gets_char;
+
+ /* Read one line in advance so we can act on the last line,
+ * the '$' address */
+ next_line = get_next_line(&next_gets_char);
+ linenum++;
+restart:
+ /* for every line, go through all the commands */
+ for (sed_cmd = bbg.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
+ int old_matched, matched;
+
+ old_matched = sed_cmd->in_match;
+
+ /* Determine if this command matches this line: */
+
+ /* Are we continuing a previous multi-line match? */
+ sed_cmd->in_match = sed_cmd->in_match
+ /* Or is no range necessary? */
+ || (!sed_cmd->beg_line && !sed_cmd->end_line
+ && !sed_cmd->beg_match && !sed_cmd->end_match)
+ /* Or did we match the start of a numerical range? */
+ || (sed_cmd->beg_line > 0 && (sed_cmd->beg_line == linenum))
+ /* Or does this line match our begin address regex? */
+ || (sed_cmd->beg_match &&
+ !regexec(sed_cmd->beg_match, pattern_space, 0, NULL, 0))
+ /* Or did we match last line of input? */
+ || (sed_cmd->beg_line == -1 && next_line == NULL);
+
+ /* Snapshot the value */
+
+ matched = sed_cmd->in_match;
+
+ /* Is this line the end of the current match? */
+
+ if (matched) {
+ sed_cmd->in_match = !(
+ /* has the ending line come, or is this a single address command? */
+ (sed_cmd->end_line ?
+ sed_cmd->end_line == -1 ?
+ !next_line
+ : (sed_cmd->end_line <= linenum)
+ : !sed_cmd->end_match
+ )
+ /* or does this line matches our last address regex */
+ || (sed_cmd->end_match && old_matched
+ && (regexec(sed_cmd->end_match,
+ pattern_space, 0, NULL, 0) == 0))
+ );
+ }
+
+ /* Skip blocks of commands we didn't match. */
+ if (sed_cmd->cmd == '{') {
+ if (sed_cmd->invert ? matched : !matched) {
+ while (sed_cmd->cmd != '}') {
+ sed_cmd = sed_cmd->next;
+ if (!sed_cmd)
+ bb_error_msg_and_die("unterminated {");
+ }
+ }
+ continue;
+ }
+
+ /* Okay, so did this line match? */
+ if (sed_cmd->invert ? !matched : matched) {
+ /* Update last used regex in case a blank substitute BRE is found */
+ if (sed_cmd->beg_match) {
+ bbg.previous_regex_ptr = sed_cmd->beg_match;
+ }
+
+ /* actual sedding */
+ switch (sed_cmd->cmd) {
+
+ /* Print line number */
+ case '=':
+ fprintf(bbg.nonstdout, "%d\n", linenum);
+ break;
+
+ /* Write the current pattern space up to the first newline */
+ case 'P':
+ {
+ char *tmp = strchr(pattern_space, '\n');
+
+ if (tmp) {
+ *tmp = '\0';
+ /* TODO: explain why '\n' below */
+ sed_puts(pattern_space, '\n');
+ *tmp = '\n';
+ break;
+ }
+ /* Fall Through */
+ }
+
+ /* Write the current pattern space to output */
+ case 'p':
+ /* NB: we print this _before_ the last line
+ * (of current file) is printed. Even if
+ * that line is nonterminated, we print
+ * '\n' here (gnu sed does the same) */
+ sed_puts(pattern_space, '\n');
+ break;
+ /* Delete up through first newline */
+ case 'D':
+ {
+ char *tmp = strchr(pattern_space, '\n');
+
+ if (tmp) {
+ tmp = xstrdup(tmp+1);
+ free(pattern_space);
+ pattern_space = tmp;
+ goto restart;
+ }
+ }
+ /* discard this line. */
+ case 'd':
+ goto discard_line;
+
+ /* Substitute with regex */
+ case 's':
+ if (!do_subst_command(sed_cmd, &pattern_space))
+ break;
+ substituted |= 1;
+
+ /* handle p option */
+ if (sed_cmd->sub_p)
+ sed_puts(pattern_space, last_gets_char);
+ /* handle w option */
+ if (sed_cmd->sw_file)
+ puts_maybe_newline(
+ pattern_space, sed_cmd->sw_file,
+ &sed_cmd->sw_last_char, last_gets_char);
+ break;
+
+ /* Append line to linked list to be printed later */
+ case 'a':
+ append(sed_cmd->string);
+ break;
+
+ /* Insert text before this line */
+ case 'i':
+ sed_puts(sed_cmd->string, '\n');
+ break;
+
+ /* Cut and paste text (replace) */
+ case 'c':
+ /* Only triggers on last line of a matching range. */
+ if (!sed_cmd->in_match)
+ sed_puts(sed_cmd->string, NO_EOL_CHAR);
+ goto discard_line;
+
+ /* Read file, append contents to output */
+ case 'r':
+ {
+ FILE *rfile;
+
+ rfile = fopen(sed_cmd->string, "r");
+ if (rfile) {
+ char *line;
+
+ while ((line = xmalloc_getline(rfile))
+ != NULL)
+ append(line);
+ xprint_and_close_file(rfile);
+ }
+
+ break;
+ }
+
+ /* Write pattern space to file. */
+ case 'w':
+ puts_maybe_newline(
+ pattern_space, sed_cmd->sw_file,
+ &sed_cmd->sw_last_char, last_gets_char);
+ break;
+
+ /* Read next line from input */
+ case 'n':
+ if (!bbg.be_quiet)
+ sed_puts(pattern_space, last_gets_char);
+ if (next_line) {
+ free(pattern_space);
+ pattern_space = next_line;
+ last_gets_char = next_gets_char;
+ next_line = get_next_line(&next_gets_char);
+ linenum++;
+ break;
+ }
+ /* fall through */
+
+ /* Quit. End of script, end of input. */
+ case 'q':
+ /* Exit the outer while loop */
+ free(next_line);
+ next_line = NULL;
+ goto discard_commands;
+
+ /* Append the next line to the current line */
+ case 'N':
+ {
+ int len;
+ /* If no next line, jump to end of script and exit. */
+ if (next_line == NULL) {
+ /* Jump to end of script and exit */
+ free(next_line);
+ next_line = NULL;
+ goto discard_line;
+ /* append next_line, read new next_line. */
+ }
+ len = strlen(pattern_space);
+ pattern_space = realloc(pattern_space, len + strlen(next_line) + 2);
+ pattern_space[len] = '\n';
+ strcpy(pattern_space + len+1, next_line);
+ last_gets_char = next_gets_char;
+ next_line = get_next_line(&next_gets_char);
+ linenum++;
+ break;
+ }
+
+ /* Test/branch if substitution occurred */
+ case 't':
+ if (!substituted) break;
+ substituted = 0;
+ /* Fall through */
+ /* Test/branch if substitution didn't occur */
+ case 'T':
+ if (substituted) break;
+ /* Fall through */
+ /* Branch to label */
+ case 'b':
+ if (!sed_cmd->string) goto discard_commands;
+ else sed_cmd = branch_to(sed_cmd->string);
+ break;
+ /* Transliterate characters */
+ case 'y':
+ {
+ int i, j;
+
+ for (i = 0; pattern_space[i]; i++) {
+ for (j = 0; sed_cmd->string[j]; j += 2) {
+ if (pattern_space[i] == sed_cmd->string[j]) {
+ pattern_space[i] = sed_cmd->string[j + 1];
+ break;
+ }
+ }
+ }
+
+ break;
+ }
+ case 'g': /* Replace pattern space with hold space */
+ free(pattern_space);
+ pattern_space = xstrdup(bbg.hold_space ? bbg.hold_space : "");
+ break;
+ case 'G': /* Append newline and hold space to pattern space */
+ {
+ int pattern_space_size = 2;
+ int hold_space_size = 0;
+
+ if (pattern_space)
+ pattern_space_size += strlen(pattern_space);
+ if (bbg.hold_space)
+ hold_space_size = strlen(bbg.hold_space);
+ pattern_space = xrealloc(pattern_space,
+ pattern_space_size + hold_space_size);
+ if (pattern_space_size == 2)
+ pattern_space[0] = 0;
+ strcat(pattern_space, "\n");
+ if (bbg.hold_space)
+ strcat(pattern_space, bbg.hold_space);
+ last_gets_char = '\n';
+
+ break;
+ }
+ case 'h': /* Replace hold space with pattern space */
+ free(bbg.hold_space);
+ bbg.hold_space = xstrdup(pattern_space);
+ break;
+ case 'H': /* Append newline and pattern space to hold space */
+ {
+ int hold_space_size = 2;
+ int pattern_space_size = 0;
+
+ if (bbg.hold_space)
+ hold_space_size += strlen(bbg.hold_space);
+ if (pattern_space)
+ pattern_space_size = strlen(pattern_space);
+ bbg.hold_space = xrealloc(bbg.hold_space,
+ hold_space_size + pattern_space_size);
+
+ if (hold_space_size == 2)
+ *bbg.hold_space = 0;
+ strcat(bbg.hold_space, "\n");
+ if (pattern_space)
+ strcat(bbg.hold_space, pattern_space);
+
+ break;
+ }
+ case 'x': /* Exchange hold and pattern space */
+ {
+ char *tmp = pattern_space;
+ pattern_space = bbg.hold_space ? : xzalloc(1);
+ last_gets_char = '\n';
+ bbg.hold_space = tmp;
+ break;
+ }
+ }
+ }
+ }
+
+ /*
+ * exit point from sedding...
+ */
+ discard_commands:
+ /* we will print the line unless we were told to be quiet ('-n')
+ or if the line was suppressed (ala 'd'elete) */
+ if (!bbg.be_quiet)
+ sed_puts(pattern_space, last_gets_char);
+
+ /* Delete and such jump here. */
+ discard_line:
+ flush_append();
+ free(pattern_space);
+
+ goto again;
+}
+
+/* It is possible to have a command line argument with embedded
+ * newlines. This counts as multiple command lines.
+ * However, newline can be escaped: 's/e/z\<newline>z/'
+ * We check for this.
+ */
+
+static void add_cmd_block(char *cmdstr)
+{
+ char *sv, *eol;
+
+ cmdstr = sv = xstrdup(cmdstr);
+ do {
+ eol = strchr(cmdstr, '\n');
+ next:
+ if (eol) {
+ /* Count preceding slashes */
+ int slashes = 0;
+ char *sl = eol;
+
+ while (sl != cmdstr && *--sl == '\\')
+ slashes++;
+ /* Odd number of preceding slashes - newline is escaped */
+ if (slashes & 1) {
+ strcpy(eol-1, eol);
+ eol = strchr(eol, '\n');
+ goto next;
+ }
+ *eol = '\0';
+ }
+ add_cmd(cmdstr);
+ cmdstr = eol + 1;
+ } while (eol);
+ free(sv);
+}
+
+static void add_cmds_link(llist_t *opt_e)
+{
+ if (!opt_e) return;
+ add_cmds_link(opt_e->link);
+ add_cmd_block(opt_e->data);
+ free(opt_e);
+}
+
+static void add_files_link(llist_t *opt_f)
+{
+ char *line;
+ FILE *cmdfile;
+ if (!opt_f) return;
+ add_files_link(opt_f->link);
+ cmdfile = xfopen(opt_f->data, "r");
+ while ((line = xmalloc_getline(cmdfile)) != NULL) {
+ add_cmd(line);
+ free(line);
+ }
+ xprint_and_close_file(cmdfile);
+ free(opt_f);
+}
+
+int sed_main(int argc, char **argv);
+int sed_main(int argc, char **argv)
+{
+ enum {
+ OPT_in_place = 1 << 0,
+ };
+ unsigned opt;
+ llist_t *opt_e, *opt_f;
+ int status = EXIT_SUCCESS;
+
+ bbg.sed_cmd_tail = &bbg.sed_cmd_head;
+
+ /* destroy command strings on exit */
+ if (ENABLE_FEATURE_CLEAN_UP) atexit(sed_free_and_close_stuff);
+
+ /* Lie to autoconf when it starts asking stupid questions. */
+ if (argc == 2 && !strcmp(argv[1], "--version")) {
+ puts("This is not GNU sed version 4.0");
+ return 0;
+ }
+
+ /* do normal option parsing */
+ opt_e = opt_f = NULL;
+ opt_complementary = "e::f::" /* can occur multiple times */
+ "nn"; /* count -n */
+ opt = getopt32(argc, argv, "irne:f:", &opt_e, &opt_f,
+ &bbg.be_quiet); /* counter for -n */
+ argc -= optind;
+ argv += optind;
+ if (opt & OPT_in_place) { // -i
+ atexit(cleanup_outname);
+ }
+ if (opt & 0x2) bbg.regex_type |= REG_EXTENDED; // -r
+ //if (opt & 0x4) bbg.be_quiet++; // -n
+ if (opt & 0x8) { // -e
+ /* getopt32 reverses order of arguments, handle it */
+ add_cmds_link(opt_e);
+ }
+ if (opt & 0x10) { // -f
+ /* getopt32 reverses order of arguments, handle it */
+ add_files_link(opt_f);
+ }
+ /* if we didn't get a pattern from -e or -f, use argv[0] */
+ if (!(opt & 0x18)) {
+ if (!argc)
+ bb_show_usage();
+ add_cmd_block(*argv++);
+ argc--;
+ }
+ /* Flush any unfinished commands. */
+ add_cmd("");
+
+ /* By default, we write to stdout */
+ bbg.nonstdout = stdout;
+
+ /* argv[0..(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[0] == NULL) {
+ if (opt & OPT_in_place)
+ bb_error_msg_and_die(bb_msg_requires_arg, "-i");
+ add_input_file(stdin);
+ process_files();
+ } else {
+ int i;
+ FILE *file;
+
+ for (i = 0; i < argc; i++) {
+ struct stat statbuf;
+ int nonstdoutfd;
+
+ if (LONE_DASH(argv[i]) && !(opt & OPT_in_place)) {
+ add_input_file(stdin);
+ process_files();
+ continue;
+ }
+ file = fopen_or_warn(argv[i], "r");
+ if (!file) {
+ status = EXIT_FAILURE;
+ continue;
+ }
+ if (!(opt & OPT_in_place)) {
+ add_input_file(file);
+ continue;
+ }
+
+ bbg.outname = xasprintf("%sXXXXXX", argv[i]);
+ nonstdoutfd = mkstemp(bbg.outname);
+ if (-1 == nonstdoutfd)
+ bb_error_msg_and_die("no temp file");
+ bbg.nonstdout = fdopen(nonstdoutfd, "w");
+
+ /* Set permissions of output file */
+
+ fstat(fileno(file), &statbuf);
+ fchmod(nonstdoutfd, statbuf.st_mode);
+ add_input_file(file);
+ process_files();
+ fclose(bbg.nonstdout);
+
+ bbg.nonstdout = stdout;
+ /* unlink(argv[i]); */
+ // FIXME: error check / message?
+ rename(bbg.outname, argv[i]);
+ free(bbg.outname);
+ bbg.outname = 0;
+ }
+ if (bbg.input_file_count > bbg.current_input_file)
+ process_files();
+ }
+
+ return status;
+}