* Copyright (C) 2003,2004 by Rob Landley <rob@landley.net>
*
* MAINTAINER: Rob Landley <rob@landley.net>
- *
+ *
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
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
- (sed_cmd_head/sed_cmd_tail).
+ (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.
#include <stdio.h>
#include <unistd.h> /* for getopt() */
-#include <string.h> /* for strdup() */
#include <errno.h>
#include <ctype.h> /* for isspace() */
#include <stdlib.h>
+#include <string.h>
#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 */
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 *file; /* File (sw) command writes to, -1 for none. */
char *string; /* Data string for (saicytb) commands. */
unsigned int no_newline:1; /* Last line written by (sw) had no '\n' */
unsigned int sub_p:1; /* (s) print option */
-
/* GENERAL FIELDS */
char cmd; /* The command char: abcdDgGhHilnNpPqrstwxy:={} */
struct sed_cmd_s *next; /* Next command (linked list, NULL terminated) */
} sed_cmd_t;
-/* globals */
-/* options */
-static int be_quiet, in_place, regex_type;
-static FILE *nonstdout;
-static char *outname,*hold_space;
-
-/* List of input files */
-static int input_file_count,current_input_file;
-static FILE **input_file_list;
-
static const char bad_format_in_subst[] =
"bad format in substitution expression";
static const char *const semicolon_whitespace = "; \n\r\t\v";
-static regmatch_t regmatch[10];
-static regex_t *previous_regex_ptr;
+struct sed_globals
+{
+ /* options */
+ int be_quiet, in_place, 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;
-/* linked list of sed commands */
-static sed_cmd_t sed_cmd_head;
-static sed_cmd_t *sed_cmd_tail = &sed_cmd_head;
+ struct pipeline {
+ char *buf; /* Space to hold string */
+ int idx; /* Space used */
+ int len; /* Space allocated */
+ } pipeline;
+} bbg;
-/* Linked list of append lines */
-struct append_list {
- char *string;
- struct append_list *next;
-};
-static struct append_list *append_head=NULL, *append_tail=NULL;
-void free_and_close_stuff(void);
-#ifdef CONFIG_FEATURE_CLEAN_UP
-static void free_and_close_stuff(void)
+void sed_free_and_close_stuff(void);
+#if ENABLE_FEATURE_CLEAN_UP
+void sed_free_and_close_stuff(void)
{
- sed_cmd_t *sed_cmd = sed_cmd_head.next;
+ sed_cmd_t *sed_cmd = bbg.sed_cmd_head.next;
- while(append_head) {
- append_tail=append_head->next;
- free(append_head->string);
- free(append_head);
- append_head=append_tail;
- }
+ llist_free(bbg.append_head, free);
while (sed_cmd) {
sed_cmd_t *sed_cmd_next = sed_cmd->next;
sed_cmd = sed_cmd_next;
}
- if(hold_space) free(hold_space);
+ if(bbg.hold_space) free(bbg.hold_space);
- while(current_input_file<input_file_count)
- fclose(input_file_list[current_input_file++]);
+ while(bbg.current_input_file<bbg.input_file_count)
+ fclose(bbg.input_file_list[bbg.current_input_file++]);
}
#endif
static void cleanup_outname(void)
{
- if(outname) unlink(outname);
+ if(bbg.outname) unlink(bbg.outname);
}
/* strdup, replacing "\n" with '\n', and "\delimiter" with 'delimiter' */
temp=copy_parsing_escapes(pos,next);
*regex = (regex_t *) xmalloc(sizeof(regex_t));
- xregcomp(*regex, temp, regex_type|REG_NEWLINE);
+ xregcomp(*regex, temp, bbg.regex_type|REG_NEWLINE);
free(temp);
/* Move position to next character after last delimiter */
pos+=(next+1);
}
/* 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)
+static int parse_file_cmd(sed_cmd_t *sed_cmd, const char *filecmdstr, char **retval)
{
int start = 0, idx, hack=0;
return idx;
}
-static int parse_subst_cmd(sed_cmd_t * const sed_cmd, char *substr)
+static int parse_subst_cmd(sed_cmd_t *const sed_cmd, char *substr)
{
- int cflags = regex_type;
+ int cflags = bbg.regex_type;
char *match;
int idx = 0;
while(isspace(*cmdstr)) cmdstr++;
length = strcspn(cmdstr, semicolon_whitespace);
if (length) {
- sed_cmd->string = strndup(cmdstr, length);
+ sed_cmd->string = bb_xstrndup(cmdstr, length);
cmdstr += length;
}
}
parse_escapes(match,match,strlen(match),i,i);
parse_escapes(replace,replace,strlen(replace),i,i);
- sed_cmd->string = xcalloc(1, (strlen(match) + 1) * 2);
+ 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];
static void add_cmd(char *cmdstr)
{
- static char *add_cmd_line=NULL;
sed_cmd_t *sed_cmd;
int temp;
/* Append this line to any unfinished line from last time. */
- if(add_cmd_line) {
- int lastlen=strlen(add_cmd_line);
- char *tmp=xmalloc(lastlen+strlen(cmdstr)+2);
-
- memcpy(tmp,add_cmd_line,lastlen);
- tmp[lastlen]='\n';
- strcpy(tmp+lastlen+1,cmdstr);
- free(add_cmd_line);
- cmdstr=add_cmd_line=tmp;
- } else add_cmd_line=NULL;
+ if (bbg.add_cmd_line) {
+ cmdstr = bb_xasprintf("%s\n%s", bbg.add_cmd_line, cmdstr);
+ free(bbg.add_cmd_line);
+ bbg.add_cmd_line = cmdstr;
+ }
/* If this line ends with backslash, request next line. */
temp=strlen(cmdstr);
if(temp && cmdstr[temp-1]=='\\') {
- if(!add_cmd_line) add_cmd_line=strdup(cmdstr);
- add_cmd_line[temp-1]=0;
+ if (!bbg.add_cmd_line) bbg.add_cmd_line = bb_xstrdup(cmdstr);
+ bbg.add_cmd_line[temp-1] = 0;
return;
}
/* 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') be_quiet++;
+ if (cmdstr[1] == 'n') bbg.be_quiet++;
if(!(cmdstr=strpbrk(cmdstr, "\n\r"))) break;
continue;
}
* part1 part2 part3
*/
- sed_cmd = xcalloc(1, sizeof(sed_cmd_t));
+ 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);
cmdstr++;
idx = get_address(cmdstr, &sed_cmd->end_line, &sed_cmd->end_match);
- if (!idx) bb_error_msg_and_die("get_address: no address found in string\n");
+ if (!idx) bb_error_msg_and_die("no address after comma\n");
cmdstr += idx;
}
cmdstr = parse_cmd_args(sed_cmd, cmdstr);
/* Add the command to the command array */
- sed_cmd_tail->next = sed_cmd;
- sed_cmd_tail = sed_cmd_tail->next;
+ 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. */
- if(add_cmd_line) {
- free(add_cmd_line);
- add_cmd_line=NULL;
- }
+ free(bbg.add_cmd_line);
+ bbg.add_cmd_line = NULL;
}
/* Append to a string, reallocating memory as necessary. */
-static struct pipeline {
- char *buf; /* Space to hold string */
- int idx; /* Space used */
- int len; /* Space allocated */
-} pipeline;
-
#define PIPE_GROW 64
static void pipe_putc(char c)
{
- if(pipeline.idx==pipeline.len) {
- pipeline.buf = xrealloc(pipeline.buf, pipeline.len + PIPE_GROW);
- pipeline.len+=PIPE_GROW;
+ if(bbg.pipeline.idx==bbg.pipeline.len) {
+ bbg.pipeline.buf = xrealloc(bbg.pipeline.buf,
+ bbg.pipeline.len + PIPE_GROW);
+ bbg.pipeline.len+=PIPE_GROW;
}
- pipeline.buf[pipeline.idx++] = (c);
+ bbg.pipeline.buf[bbg.pipeline.idx++] = c;
}
static void do_subst_w_backrefs(const char *line, const char *replace)
if (replace[i] == '\\' && replace[i+1]>='0' && replace[i+1]<='9') {
int backref=replace[++i]-'0';
- /* print out the text held in regmatch[backref] */
- if(regmatch[backref].rm_so != -1)
- for (j = regmatch[backref].rm_so; j < regmatch[backref].rm_eo; j++)
- pipe_putc(line[j]);
+ /* print out the text held in bbg.regmatch[backref] */
+ if(bbg.regmatch[backref].rm_so != -1)
+ for (j = bbg.regmatch[backref].rm_so;
+ j < bbg.regmatch[backref].rm_eo; j++) pipe_putc(line[j]);
}
/* if we find a backslash escaped character, print the character */
/* if we find an unescaped '&' print out the whole matched text. */
else if (replace[i] == '&')
- for (j = regmatch[0].rm_so; j < regmatch[0].rm_eo; j++)
+ for (j = bbg.regmatch[0].rm_so; j < bbg.regmatch[0].rm_eo; j++)
pipe_putc(line[j]);
/* Otherwise just output the character. */
else pipe_putc(replace[i]);
}
}
-static int do_subst_command(sed_cmd_t * sed_cmd, char **line)
+static int do_subst_command(sed_cmd_t *sed_cmd, char **line)
{
char *oldline = *line;
int altered = 0;
/* Handle empty regex. */
if (sed_cmd->sub_match == NULL) {
- current_regex = previous_regex_ptr;
+ current_regex = bbg.previous_regex_ptr;
if(!current_regex)
bb_error_msg_and_die("No previous regexp.");
- } else previous_regex_ptr = current_regex = sed_cmd->sub_match;
+ } else bbg.previous_regex_ptr = current_regex = sed_cmd->sub_match;
/* Find the first match */
- if(REG_NOMATCH==regexec(current_regex, oldline, 10, regmatch, 0))
+ if(REG_NOMATCH==regexec(current_regex, oldline, 10, bbg.regmatch, 0))
return 0;
/* Initialize temporary output buffer. */
- pipeline.buf=xmalloc(PIPE_GROW);
- pipeline.len=PIPE_GROW;
- pipeline.idx=0;
+ bbg.pipeline.buf=xmalloc(PIPE_GROW);
+ bbg.pipeline.len=PIPE_GROW;
+ bbg.pipeline.idx=0;
/* Now loop through, substituting for matches */
do {
echo " a.b" | busybox sed 's [^ .]* x g'
The match_count check is so not to break
echo "hi" | busybox sed 's/^/!/g' */
- if(!regmatch[0].rm_so && !regmatch[0].rm_eo && match_count) {
+ if(!bbg.regmatch[0].rm_so && !bbg.regmatch[0].rm_eo && match_count) {
pipe_putc(*(oldline++));
continue;
}
/* 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<regmatch[0].rm_eo;i++)
+ for(i=0;i<bbg.regmatch[0].rm_eo;i++)
pipe_putc(oldline[i]);
continue;
}
/* print everything before the match */
- for (i = 0; i < regmatch[0].rm_so; i++) pipe_putc(oldline[i]);
+ 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 += regmatch[0].rm_eo;
+ 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, regmatch, 0) != REG_NOMATCH));
+ } while (*oldline && (regexec(current_regex, oldline, 10, bbg.regmatch, 0) != REG_NOMATCH));
/* Copy rest of string into output pipeline */
pipe_putc(0);
free(*line);
- *line = pipeline.buf;
+ *line = bbg.pipeline.buf;
return altered;
}
{
sed_cmd_t *sed_cmd;
- for (sed_cmd = sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
+ 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) == 0)) {
return (sed_cmd);
}
bb_error_msg_and_die("Can't find label for jump to `%s'", label);
}
-/* Append copy of string to append buffer */
static void append(char *s)
{
- struct append_list *temp=calloc(1,sizeof(struct append_list));
-
- if(append_head)
- append_tail=(append_tail->next=temp);
- else append_head=append_tail=temp;
- temp->string=strdup(s);
+ llist_add_to_end(&bbg.append_head, bb_xstrdup(s));
}
static void flush_append(void)
{
+ char *data;
+
/* Output appended lines. */
- while(append_head) {
- fprintf(nonstdout,"%s\n",append_head->string);
- append_tail=append_head->next;
- free(append_head->string);
- free(append_head);
- append_head=append_tail;
+ while((data = (char *)llist_pop(&bbg.append_head))) {
+ fprintf(bbg.nonstdout,"%s\n",data);
+ free(data);
}
- append_head=append_tail=NULL;
}
static void add_input_file(FILE *file)
{
- input_file_list=xrealloc(input_file_list,(input_file_count+1)*sizeof(FILE *));
- input_file_list[input_file_count++]=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 input_file_list, flushing append buffer and
+/* 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.
*/
static char *get_next_line(int *no_newline)
int len;
flush_append();
- while (current_input_file<input_file_count) {
- temp = bb_get_chunk_from_file(input_file_list[current_input_file],&len);
+ while (bbg.current_input_file<bbg.input_file_count) {
+ temp = bb_get_chunk_from_file(bbg.input_file_list[bbg.current_input_file],&len);
if (temp) {
*no_newline = !(len && temp[len-1]=='\n');
if (!*no_newline) temp[len-1] = 0;
break;
// Close this file and advance to next one
- } else fclose(input_file_list[current_input_file++]);
+ } else fclose(bbg.input_file_list[bbg.current_input_file++]);
}
return temp;
if(!no_newline) fputc('\n',file);
if(ferror(file)) {
- fprintf(stderr,"Write failed.\n");
- exit(4); /* It's what gnu sed exits with... */
+ bb_default_error_retval = 4; /* It's what gnu sed exits with... */
+ bb_error_msg_and_die(bb_msg_write_error);
}
return no_newline;
}
-#define sed_puts(s,n) missing_newline=puts_maybe_newline(s,nonstdout,missing_newline,n)
+#define sed_puts(s,n) missing_newline=puts_maybe_newline(s,bbg.nonstdout,missing_newline,n)
/* Process all the lines in all the files */
linenum++;
restart:
/* for every line, go through all the commands */
- for (sed_cmd = sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
+ 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;
if (sed_cmd->invert ? !matched : matched) {
/* Update last used regex in case a blank substitute BRE is found */
if (sed_cmd->beg_match) {
- previous_regex_ptr = sed_cmd->beg_match;
+ bbg.previous_regex_ptr = sed_cmd->beg_match;
}
/* actual sedding */
/* Print line number */
case '=':
- fprintf(nonstdout,"%d\n", linenum);
+ fprintf(bbg.nonstdout,"%d\n", linenum);
break;
/* Write the current pattern space up to the first newline */
/* Read next line from input */
case 'n':
- if (!be_quiet)
+ if (!bbg.be_quiet)
sed_puts(pattern_space,no_newline);
if (next_line) {
free(pattern_space);
}
case 'g': /* Replace pattern space with hold space */
free(pattern_space);
- pattern_space = strdup(hold_space ? hold_space : "");
+ pattern_space = bb_xstrdup(bbg.hold_space ? bbg.hold_space : "");
break;
case 'G': /* Append newline and hold space to pattern space */
{
if (pattern_space)
pattern_space_size += strlen(pattern_space);
- if (hold_space) hold_space_size = strlen(hold_space);
- pattern_space = xrealloc(pattern_space, pattern_space_size + hold_space_size);
+ 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 (hold_space) strcat(pattern_space, hold_space);
+ if (bbg.hold_space)
+ strcat(pattern_space, bbg.hold_space);
no_newline=0;
break;
}
case 'h': /* Replace hold space with pattern space */
- free(hold_space);
- hold_space = strdup(pattern_space);
+ free(bbg.hold_space);
+ bbg.hold_space = bb_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 (hold_space) hold_space_size += strlen(hold_space);
+ if (bbg.hold_space)
+ hold_space_size += strlen(bbg.hold_space);
if (pattern_space)
pattern_space_size = strlen(pattern_space);
- hold_space = xrealloc(hold_space,
+ bbg.hold_space = xrealloc(bbg.hold_space,
hold_space_size + pattern_space_size);
- if (hold_space_size == 2) hold_space[0]=0;
- strcat(hold_space, "\n");
- if (pattern_space) strcat(hold_space, pattern_space);
+ 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 = hold_space;
+ pattern_space = bbg.hold_space;
no_newline=0;
- hold_space = tmp;
+ bbg.hold_space = tmp;
break;
}
}
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 (!be_quiet) sed_puts(pattern_space,no_newline);
+ if (!bbg.be_quiet) sed_puts(pattern_space,no_newline);
/* Delete and such jump here. */
discard_line:
free(temp);
}
-extern int sed_main(int argc, char **argv)
+int sed_main(int argc, char **argv)
{
int status = EXIT_SUCCESS, opt, getpat = 1;
+ bbg.sed_cmd_tail=&bbg.sed_cmd_head;
+
/* destroy command strings on exit */
- if (ENABLE_FEATURE_CLEAN_UP && atexit(free_and_close_stuff) == -1)
- bb_perror_msg_and_die("atexit");
+ 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")) {
while ((opt = getopt(argc, argv, "irne:f:")) > 0) {
switch (opt) {
case 'i':
- in_place++;
+ bbg.in_place++;
atexit(cleanup_outname);
break;
case 'r':
- regex_type|=REG_EXTENDED;
+ bbg.regex_type|=REG_EXTENDED;
break;
case 'n':
- be_quiet++;
+ bbg.be_quiet++;
break;
case 'e':
add_cmd_block(optarg);
add_cmd("");
/* By default, we write to stdout */
- nonstdout=stdout;
+ bbg.nonstdout=stdout;
/* 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) {
- if(in_place) bb_error_msg_and_die("Filename required for -i");
+ if(bbg.in_place) bb_error_msg_and_die(bb_msg_requires_arg, "-i");
add_input_file(stdin);
process_files();
} else {
FILE *file;
for (i = optind; i < argc; i++) {
- if(!strcmp(argv[i], "-") && !in_place) {
+ if(!strcmp(argv[i], "-") && !bbg.in_place) {
add_input_file(stdin);
process_files();
} else {
file = bb_wfopen(argv[i], "r");
if (file) {
- if(in_place) {
+ if(bbg.in_place) {
struct stat statbuf;
int nonstdoutfd;
- outname=bb_xstrndup(argv[i],strlen(argv[i])+6);
- strcat(outname,"XXXXXX");
- if(-1==(nonstdoutfd=mkstemp(outname)))
+ bbg.outname=bb_xstrndup(argv[i],strlen(argv[i])+6);
+ strcat(bbg.outname,"XXXXXX");
+ if(-1==(nonstdoutfd=mkstemp(bbg.outname)))
bb_error_msg_and_die("no temp file");
- nonstdout=fdopen(nonstdoutfd,"w");
-
+ 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(nonstdout);
-
- nonstdout=stdout;
+ fclose(bbg.nonstdout);
+
+ bbg.nonstdout=stdout;
unlink(argv[i]);
- rename(outname,argv[i]);
- free(outname);
- outname=0;
+ rename(bbg.outname,argv[i]);
+ free(bbg.outname);
+ bbg.outname=0;
} else add_input_file(file);
} else {
status = EXIT_FAILURE;
}
}
}
- if(input_file_count>current_input_file) process_files();
+ if(bbg.input_file_count>bbg.current_input_file) process_files();
}
return status;
projects / oweals / busybox.git / blobdiff