/*
* 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>
+ * 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
*
* 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
- 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
struct sed_cmd {
-
-
- /* GENERAL FIELDS */
- char delimiter; /* The delimiter used to separate regexps */
+ /* Order by alignment requirements */
/* 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;
+
+ /* EDIT COMMAND (a,i,c) SPECIFIC FIELDS */
+ char *editline;
+
+ /* FILE COMMAND (r) SPECIFIC FIELDS */
+ char *filename;
+
+ /* 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 == $ */
+ /* SUBSTITUTION COMMAND SPECIFIC FIELDS */
+
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) */
+ /* GENERAL FIELDS */
+ char delimiter; /* The delimiter used to separate regexps */
- /* EDIT COMMAND (a,i,c) SPEICIFIC FIELDS */
+ /* the command */
+ char cmd; /* p,d,s (add more at your leisure :-) */
- char *editline;
+ /* inversion flag */
+ int invert; /* the '!' after the address */
};
/* globals */
/*static char *cur_file = NULL;*/ /* file currently being processed XXX: do I need this? */
-#ifdef BB_FEATURE_CLEAN_UP
-static void destroy_cmd_strs()
+const char * const semicolon_whitespace = "; \n\r\t\v\0";
+
+#ifdef CONFIG_FEATURE_CLEAN_UP
+static void destroy_cmd_strs(void)
{
if (sed_cmds == NULL)
return;
* 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)
+static int index_of_next_unescaped_regexp_delim(const struct sed_cmd * const sed_cmd, const char *str, int idx)
{
- for ( ; str[idx]; idx++) {
- if (str[idx] == sed_cmd->delimiter && str[idx-1] != '\\')
+ int bracket = -1;
+ int escaped = 0;
+ char ch;
+
+ for ( ; (ch = str[idx]); idx++) {
+ if (bracket != -1) {
+ 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 (ch == '[')
+ bracket = idx;
+ else if (ch == sed_cmd->delimiter)
return idx;
}
/*
* 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 *line, regex_t **regex)
+static int get_address(struct sed_cmd *sed_cmd, const char *str, int *linenum, regex_t **regex)
{
- char *my_str = strdup(str);
+ char *my_str = xstrdup(str);
int idx = 0;
char olddelimiter;
olddelimiter = sed_cmd->delimiter;
idx++;
} while (isdigit(my_str[idx]));
my_str[idx] = 0;
- *line = atoi(my_str);
+ *linenum = atoi(my_str);
}
else if (my_str[idx] == '$') {
- *line = -1;
+ *linenum = -1;
idx++;
}
- else if (my_str[idx] == '/') {
+ else if (my_str[idx] == '/' || my_str[idx] == '\\') {
+ if (my_str[idx] == '\\') {
+ my_str[idx] = 0;
+ sed_cmd-> delimiter = 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, 0);
+ xregcomp(*regex, my_str+1, REG_NEWLINE);
idx++; /* so it points to the next character after the last '/' */
}
else {
return idx;
}
-static char *strdup_substr(const char *str, int start, int end)
-{
- int size = end - start + 1;
- char *newstr = xmalloc(size);
- memcpy(newstr, str+start, size-1);
- newstr[size-1] = '\0';
- return newstr;
-}
-
-static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr)
+static int parse_subst_cmd(struct sed_cmd * const sed_cmd, const char *substr)
{
int oldidx, cflags = REG_NEWLINE;
char *match;
idx = index_of_next_unescaped_regexp_delim(sed_cmd, substr, ++idx);
if (idx == -1)
error_msg_and_die("bad format in substitution expression");
- match = strdup_substr(substr, oldidx, idx);
+ 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()
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 = strdup_substr(substr, oldidx, idx);
+ sed_cmd->replace = xstrndup(substr + oldidx, idx - oldidx);
/* process the flags */
while (substr[++idx]) {
break;
default:
/* any whitespace or semicolon trailing after a s/// is ok */
- if (strchr("; \t\v\n\r", substr[idx]))
+ if (strchr(semicolon_whitespace, substr[idx]))
goto out;
/* else */
error_msg_and_die("bad option in substitution expression");
return idx;
}
+static void move_back(char *str, int offset)
+{
+ memmove(str, str + offset, strlen(str + offset) + 1);
+}
+
static int parse_edit_cmd(struct sed_cmd *sed_cmd, const char *editstr)
{
- int idx = 0;
- int slashes_eaten = 0;
- char *ptr; /* shorthand */
+ int i, j;
/*
* the string that gets passed to this function should look like this:
*
*/
- if (editstr[1] != '\\' && (editstr[2] != '\n' || editstr[2] != '\r'))
+ 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';
+ for (i = 3, j = 0; editstr[i] != '\0' && strchr("\r\n", editstr[i]) == NULL;
+ i++, j++) {
+ if (editstr[i] == '\\' && strchr("\n\r", editstr[i+1]) != NULL) {
+ sed_cmd->editline[j] = '\n';
+ i++;
+ } else
+ sed_cmd->editline[j] = editstr[i];
}
-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++;
- }
+ if (sed_cmd->editline[j-1] != '\n')
+ sed_cmd->editline[j++] = '\n';
/* terminate string */
- ptr[idx]= 0;
- /* adjust for opening 2 chars [aic]\ */
- idx += 2;
+ sed_cmd->editline[j] = '\0';
- return idx;
+ return i;
}
-static char *parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr)
+
+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], semicolon_whitespace);
+ 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 * const sed_cmd, const char *const cmdstr)
{
int idx = 0;
* 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);
+ if (cmdstr[idx] == ',') {
+ idx++;
+ idx += get_address(sed_cmd, &cmdstr[idx], &sed_cmd->end_line, &sed_cmd->end_match);
+ }
+
+ /* skip whitespace before the command */
+ while (isspace(cmdstr[idx]))
+ idx++;
+
+ /* there my be the inversion flag between part2 and part3 */
+ sed_cmd->invert = 0;
+ if (cmdstr[idx] == '!') {
+ sed_cmd->invert = 1;
+ idx++;
+
+ /* skip whitespace before the command */
+ while (isspace(cmdstr[idx]))
+ idx++;
+ }
/* last part (mandatory) will be a command */
if (cmdstr[idx] == '\0')
error_msg_and_die("missing command");
- if (!strchr("pdsaic", cmdstr[idx])) /* <-- XXX add new commands here */
- error_msg_and_die("invalid command");
sed_cmd->cmd = cmdstr[idx];
- /* special-case handling for (s)ubstitution */
- if (sed_cmd->cmd == 's') {
+ /* 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", sed_cmd->cmd)) {
+ idx++;
+ }
+ /* handle (s)ubstitution command */
+ else if (sed_cmd->cmd == 's') {
idx += parse_subst_cmd(sed_cmd, &cmdstr[idx]);
}
- /* special-case handling for (a)ppend, (i)nsert, and (c)hange */
- else if (strchr("aic", cmdstr[idx])) {
- if (sed_cmd->end_line || sed_cmd->end_match)
+ /* 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]);
}
- /* if it was a single-letter command (such as 'p' or 'd') we need to
- * increment the index past that command */
- else
- 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)
+static void add_cmd_str(const char * const cmdstr)
{
char *mystr = (char *)cmdstr;
do {
/* trim leading whitespace and semicolons */
- memmove(mystr, &mystr[strspn(mystr, "; \n\r\t\v")], strlen(mystr));
+ move_back(mystr, strspn(mystr, semicolon_whitespace));
/* 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");
+ mystr = strpbrk(mystr, "\n\r");
continue;
}
/* grow the array */
}
}
-static void print_subst_w_backrefs(const char *line, const char *replace, regmatch_t *regmatch)
+struct pipeline {
+ char *buf;
+ int idx;
+ int len;
+};
+
+#define PIPE_MAGIC 0x7f
+#define PIPE_GROW 64
+
+void pipe_putc(struct pipeline *const pipeline, char c)
+{
+ if (pipeline->buf[pipeline->idx] == PIPE_MAGIC) {
+ pipeline->buf =
+ xrealloc(pipeline->buf, pipeline->len + PIPE_GROW);
+ memset(pipeline->buf + pipeline->len, 0, PIPE_GROW);
+ pipeline->len += PIPE_GROW;
+ pipeline->buf[pipeline->len - 1] = PIPE_MAGIC;
+ }
+ pipeline->buf[pipeline->idx++] = (c);
+}
+
+#define pipeputc(c) pipe_putc(pipeline, c)
+
+#if 0
+{ 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); }
+#endif
+
+static void print_subst_w_backrefs(const char *line, const char *replace,
+ regmatch_t *regmatch, struct pipeline *const pipeline, int matches)
{
int i;
tmpstr[1] = 0;
backref = atoi(tmpstr);
/* print out the text held in regmatch[backref] */
- for (j = regmatch[backref].rm_so; j < regmatch[backref].rm_eo; j++)
- fputc(line[j], stdout);
+ 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;
- fputc(replace[i], stdout);
+ pipeputc(replace[i]);
}
/* if we find an unescaped '&' print out the whole matched text.
else if (replace[i] == '&' && replace[i-1] != '\\') {
int j;
for (j = regmatch[0].rm_so; j < regmatch[0].rm_eo; j++)
- fputc(line[j], stdout);
+ pipeputc(line[j]);
}
/* nothing special, just print this char of the replacement string to stdout */
else
- fputc(replace[i], stdout);
+ pipeputc(replace[i]);
}
}
-static int do_subst_command(const struct sed_cmd *sed_cmd, const char *line)
+static int do_subst_command(const struct sed_cmd *sed_cmd, char **line)
{
- char *hackline = (char *)line;
+ char *hackline = *line;
+ struct pipeline thepipe = { NULL, 0 , 0};
+ struct pipeline *const pipeline = &thepipe;
int altered = 0;
regmatch_t *regmatch = NULL;
/* we only proceed if the substitution 'search' expression matches */
- if (regexec(sed_cmd->sub_match, line, 0, NULL, 0) == REG_NOMATCH)
+ 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 */
+ thepipe.len = strlen(hackline)+PIPE_GROW;
+ thepipe.buf = xcalloc(1, thepipe.len);
+ /* buffer magic */
+ thepipe.buf[thepipe.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 && (regexec(sed_cmd->sub_match, hackline,
- sed_cmd->num_backrefs+1, regmatch, 0) == 0) ) {
+ 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++)
- fputc(hackline[i], stdout);
+ pipeputc(hackline[i]);
/* then print the substitution string */
- print_subst_w_backrefs(hackline, sed_cmd->replace, regmatch);
+ print_subst_w_backrefs(hackline, sed_cmd->replace, regmatch,
+ pipeline, sed_cmd->num_backrefs);
/* advance past the match */
hackline += regmatch[0].rm_eo;
break;
}
- /* if there's anything left of the line, print it */
- if (*hackline)
- fputs(hackline, stdout);
+ for (; *hackline; hackline++) pipeputc(*hackline);
+ if (thepipe.buf[thepipe.idx] == PIPE_MAGIC) thepipe.buf[thepipe.idx] = 0;
/* cleanup */
free(regmatch);
+ free(*line);
+ *line = thepipe.buf;
return altered;
}
-static int do_sed_command(const struct sed_cmd *sed_cmd, const char *line)
-{
- int altered = 0;
-
- switch (sed_cmd->cmd) {
-
- case 'p':
- fputs(line, stdout);
- 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_cmd->sub_p)
- break;
-
- /* we print the line once, unless we were told to be quiet */
- if (!be_quiet)
- altered = do_subst_command(sed_cmd, line);
-
- /* we also print the line if we were given the 'p' flag
- * (this is quite possibly the second printing) */
- if (sed_cmd->sub_p)
- altered = do_subst_command(sed_cmd, line);
-
- break;
-
- case 'a':
- fputs(line, stdout);
- fputs(sed_cmd->editline, stdout);
- altered++;
- break;
-
- case 'i':
- fputs(sed_cmd->editline, stdout);
- break;
-
- case 'c':
- fputs(sed_cmd->editline, stdout);
- altered++;
- break;
- }
-
- 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 line_altered;
+ int altered;
int i;
/* go through every line in the file */
while ((line = get_line_from_file(file)) != NULL) {
+ chomp(line);
linenum++;
- line_altered = 0;
+ altered = 0;
/* for every line, go through all the commands */
for (i = 0; i < ncmds; i++) {
+ struct sed_cmd *sed_cmd = &sed_cmds[i];
+ int deleted = 0;
- /* are we acting on a range of matched lines? */
- if (sed_cmds[i].beg_match && sed_cmds[i].end_match) {
- if (still_in_range || regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0) {
- line_altered += do_sed_command(&sed_cmds[i], line);
- if (still_in_range && regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0)
- still_in_range = 0;
- else
- still_in_range = 1;
+ /*
+ * entry point into sedding...
+ */
+ int matched = (
+ /* no range necessary */
+ (sed_cmd->beg_line == 0 && sed_cmd->end_line == 0 &&
+ sed_cmd->beg_match == NULL &&
+ sed_cmd->end_match == NULL) ||
+ /* this line number is the first address we're looking for */
+ (sed_cmd->beg_line && (sed_cmd->beg_line == linenum)) ||
+ /* this line matches our first address regex */
+ (sed_cmd->beg_match && (regexec(sed_cmd->beg_match, line, 0, NULL, 0) == 0)) ||
+ /* we are currently within the beginning & ending address range */
+ still_in_range
+ );
+
+ if (sed_cmd->invert ^ matched) {
+
+ /*
+ * actual sedding
+ */
+ switch (sed_cmd->cmd) {
+
+ case 'p':
+ puts(line);
+ break;
+
+ case 'd':
+ altered++;
+ deleted = 1;
+ 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_cmd->sub_p)
+ break;
+
+ /* we print the line once, unless we were told to be quiet */
+ if (!be_quiet)
+ altered |= do_subst_command(sed_cmd, &line);
+
+ /* we also print the line if we were given the 'p' flag
+ * (this is quite possibly the second printing) */
+ if (sed_cmd->sub_p)
+ altered |= do_subst_command(sed_cmd, &line);
+ if (altered && (i+1 >= ncmds || sed_cmds[i+1].cmd != 's'))
+ puts(line);
+
+ break;
+
+ case 'a':
+ puts(line);
+ fputs(sed_cmd->editline, stdout);
+ altered++;
+ break;
+
+ case 'i':
+ fputs(sed_cmd->editline, stdout);
+ break;
+
+ case 'c':
+ /* single-address case */
+ if ((sed_cmd->end_match == NULL && sed_cmd->end_line == 0)
+ /* multi-address case */
+ /* - matching text */
+ || (sed_cmd->end_match && (regexec(sed_cmd->end_match, line, 0, NULL, 0) == 0))
+ /* - matching line numbers */
+ || (sed_cmd->end_line > 0 && sed_cmd->end_line == linenum))
+ {
+ fputs(sed_cmd->editline, stdout);
+ }
+ altered++;
+
+ break;
+
+ case 'r': {
+ FILE *outfile;
+ puts(line);
+ outfile = fopen(sed_cmd->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;
}
}
- /* are we trying to match a single line? */
- else if (sed_cmds[i].beg_match) {
- if (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0)
- line_altered += do_sed_command(&sed_cmds[i], line);
- }
-
- /* are we acting on a range of line numbers? */
- else if (sed_cmds[i].beg_line > 0 && sed_cmds[i].end_line != 0) {
- if (linenum >= sed_cmds[i].beg_line &&
- (sed_cmds[i].end_line == -1 || linenum <= sed_cmds[i].end_line))
- line_altered += do_sed_command(&sed_cmds[i], line);
- }
+ /*
+ * exit point from sedding...
+ */
+ if (matched) {
+ if (
+ /* this is a single-address command or... */
+ (sed_cmd->end_line == 0 && sed_cmd->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_cmd->end_line && (sed_cmd->end_line == linenum)) ||
+ /* this line matches our last address regex */
+ (sed_cmd->end_match && (regexec(sed_cmd->end_match, line, 0, NULL, 0) == 0))
+ )
+ )
+ ) {
+ /* we're out of our address range */
+ still_in_range = 0;
+ }
- /* are we acting on a specified line number */
- else if (sed_cmds[i].beg_line > 0) {
- if (linenum == sed_cmds[i].beg_line)
- line_altered += do_sed_command(&sed_cmds[i], line);
+ /* didn't hit the exit? then we're still in the middle of an address range */
+ else {
+ still_in_range = 1;
+ }
}
- /* not acting on matches or line numbers. act on every line */
- else
- line_altered += do_sed_command(&sed_cmds[i], line);
-
+ if (deleted)
+ break;
}
/* 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 && !line_altered)
- fputs(line, stdout);
+ if (!be_quiet && !altered)
+ puts(line);
free(line);
}
extern int sed_main(int argc, char **argv)
{
- int opt;
+ int opt, status = EXIT_SUCCESS;
-#ifdef BB_FEATURE_CLEAN_UP
+#ifdef CONFIG_FEATURE_CLEAN_UP
/* destroy command strings on exit */
if (atexit(destroy_cmd_strs) == -1)
perror_msg_and_die("atexit");
int i;
FILE *file;
for (i = optind; i < argc; i++) {
- file = fopen(argv[i], "r");
- if (file == NULL) {
- perror_msg("%s", argv[i]);
- } else {
+ file = wfopen(argv[i], "r");
+ if (file) {
process_file(file);
fclose(file);
- }
+ } else
+ status = EXIT_FAILURE;
}
}
- return 0;
+ return status;
}
projects / oweals / busybox.git / blobdiff