* resulting sed_cmd_t structures are appended to a linked list
* (G.sed_cmd_head/G.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.
* Todo:
* - Create a wrapper around regex to make libc's regex conform with sed
*
- * Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
+ * Reference
+ * http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
+ * http://pubs.opengroup.org/onlinepubs/9699919799/utilities/sed.html
*/
+//config:config SED
+//config: bool "sed"
+//config: default y
+//config: help
+//config: sed is used to perform text transformations on a file
+//config: or input from a pipeline.
+
+//kbuild:lib-$(CONFIG_SED) += sed.o
+
+//applet:IF_SED(APPLET(sed, BB_DIR_BIN, BB_SUID_DROP))
+
//usage:#define sed_trivial_usage
-//usage: "[-inr] [-f FILE]... [-e CMD]... [FILE]...\n"
-//usage: "or: sed [-inr] CMD [FILE]..."
+//usage: "[-inrE] [-f FILE]... [-e CMD]... [FILE]...\n"
+//usage: "or: sed [-inrE] CMD [FILE]..."
//usage:#define sed_full_usage "\n\n"
//usage: " -e CMD Add CMD to sed commands to be executed"
//usage: "\n -f FILE Add FILE contents to sed commands to be executed"
//usage: "\n -i[SFX] Edit files in-place (otherwise sends to stdout)"
-//usage: "\n Optionally backs files up, appending SFX"
+//usage: "\n Optionally back files up, appending SFX"
//usage: "\n -n Suppress automatic printing of pattern space"
-//usage: "\n -r Use extended regex syntax"
+//usage: "\n -r,-E Use extended regex syntax"
//usage: "\n"
//usage: "\nIf no -e or -f, the first non-option argument is the sed command string."
//usage: "\nRemaining arguments are input files (stdin if none)."
struct globals {
/* options */
int be_quiet, regex_type;
+
FILE *nonstdout;
char *outname, *hold_space;
+ smallint exitcode;
- /* List of input files */
- int input_file_count, current_input_file;
- FILE **input_file_list;
+ /* list of input files */
+ int current_input_file, last_input_file;
+ char **input_file_list;
+ FILE *current_fp;
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 */
+ /* linked list of append lines */
llist_t *append_head;
char *add_cmd_line;
free(G.hold_space);
- while (G.current_input_file < G.input_file_count)
- fclose(G.input_file_list[G.current_input_file++]);
+ if (G.current_fp)
+ fclose(G.current_fp);
}
#else
void sed_free_and_close_stuff(void);
next = index_of_next_unescaped_regexp_delim(delimiter, ++pos);
temp = copy_parsing_escapes(pos, next);
*regex = xzalloc(sizeof(regex_t));
- xregcomp(*regex, temp, G.regex_type|REG_NEWLINE);
+ xregcomp(*regex, temp, G.regex_type);
free(temp);
/* Move position to next character after last delimiter */
pos += (next+1);
/*
* A substitution command should look something like this:
- * s/match/replace/ #gIpw
+ * s/match/replace/ #giIpw
* || | |||
* mandatory optional
*/
break;
}
/* Ignore case (gnu exension) */
+ case 'i':
case 'I':
cflags |= REG_ICASE;
break;
}
/* handle edit cmds: (a)ppend, (i)nsert, and (c)hange */
else if (idx <= IDX_c) { /* a,i,c */
- 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");
+ if (idx < IDX_c) { /* a,i */
+ if (sed_cmd->end_line || sed_cmd->end_match)
+ bb_error_msg_and_die("command '%c' uses only one address", sed_cmd->cmd);
+ }
for (;;) {
if (*cmdstr == '\n' || *cmdstr == '\\') {
cmdstr++;
}
/* handle file cmds: (r)ead */
else if (idx <= IDX_w) { /* r,w */
- if (sed_cmd->end_line || sed_cmd->end_match)
- bb_error_msg_and_die("command only uses one address");
+ if (idx < IDX_w) { /* r */
+ if (sed_cmd->end_line || sed_cmd->end_match)
+ bb_error_msg_and_die("command '%c' uses only one address", sed_cmd->cmd);
+ }
cmdstr += parse_file_cmd(/*sed_cmd,*/ cmdstr, &sed_cmd->string);
if (sed_cmd->cmd == 'w') {
sed_cmd->sw_file = xfopen_for_write(sed_cmd->string);
sed_cmd->cmd = *cmdstr++;
cmdstr = parse_cmd_args(sed_cmd, cmdstr);
+ /* cmdstr now points past args.
+ * GNU sed requires a separator, if there are more commands,
+ * else it complains "char N: extra characters after command".
+ * Example: "sed 'p;d'". We also allow "sed 'pd'".
+ */
+
/* Add the command to the command array */
*G.sed_cmd_tail = sed_cmd;
G.sed_cmd_tail = &sed_cmd->next;
* second is "" before "d", third is "" after "d".
* Second match is NOT replaced!
*/
- if (prev_match_empty || start != 0) {
+ if (prev_match_empty || start != 0 || start != end) {
+ //dbg("%d %d %d", prev_match_empty, start, end);
dbg("inserting replacement at %d in '%s'", start, line);
do_subst_w_backrefs(line, sed_cmd->string);
+ /* Flag that something has changed */
+ altered = 1;
} else {
dbg("NOT inserting replacement at %d in '%s'", start, line);
}
* copy verbatim one char after it before attempting more matches
*/
prev_match_empty = (start == end);
- if (prev_match_empty && line[end]) {
- pipe_putc(line[end]);
- end++;
+ if (prev_match_empty) {
+ if (!line[end]) {
+ tried_at_eol = 1;
+ } else {
+ pipe_putc(line[end]);
+ end++;
+ }
}
/* Advance past the match */
dbg("line += %d", end);
line += end;
- /* Flag that something has changed */
- altered = 1;
/* if we're not doing this globally, get out now */
if (sed_cmd->which_match != 0)
static void append(char *s)
{
- llist_add_to_end(&G.append_head, xstrdup(s));
+ llist_add_to_end(&G.append_head, s);
}
-static void flush_append(void)
+/* 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|
+ */
+enum {
+ NO_EOL_CHAR = 1,
+ LAST_IS_NUL = 2,
+};
+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;
+}
+
+static void flush_append(char *last_puts_char, char last_gets_char)
{
char *data;
/* Output appended lines. */
while ((data = (char *)llist_pop(&G.append_head))) {
- fprintf(G.nonstdout, "%s\n", data);
+ puts_maybe_newline(data, G.nonstdout, last_puts_char, last_gets_char);
free(data);
}
}
-static void add_input_file(FILE *file)
-{
- G.input_file_list = xrealloc_vector(G.input_file_list, 2, G.input_file_count);
- G.input_file_list[G.input_file_count++] = file;
-}
-
/* Get next line of input from G.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)
+static char *get_next_line(char *gets_char, char *last_puts_char, char last_gets_char)
{
char *temp = NULL;
int len;
char gc;
- flush_append();
+ flush_append(last_puts_char, last_gets_char);
/* will be returned if last line in the file
* doesn't end with either '\n' or '\0' */
gc = NO_EOL_CHAR;
- while (G.current_input_file < G.input_file_count) {
- FILE *fp = G.input_file_list[G.current_input_file];
+ for (; G.current_input_file <= G.last_input_file; G.current_input_file++) {
+ FILE *fp = G.current_fp;
+ if (!fp) {
+ const char *path = G.input_file_list[G.current_input_file];
+ fp = stdin;
+ if (path != bb_msg_standard_input) {
+ fp = fopen_or_warn(path, "r");
+ if (!fp) {
+ G.exitcode = EXIT_FAILURE;
+ continue;
+ }
+ }
+ G.current_fp = fp;
+ }
/* 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 */
* (note: *no* newline after "b bang"!) */
}
/* Close this file and advance to next one */
- fclose(fp);
- G.current_input_file++;
+ fclose_if_not_stdin(fp);
+ G.current_fp = NULL;
}
*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, G.nonstdout, &last_puts_char, n))
static int beg_match(sed_cmd_t *sed_cmd, const char *pattern_space)
int substituted;
/* Prime the pump */
- next_line = get_next_line(&next_gets_char);
+ next_line = get_next_line(&next_gets_char, &last_puts_char, '\n' /*last_gets_char*/);
/* Go through every line in each file */
again:
/* Read one line in advance so we can act on the last line,
* the '$' address */
- next_line = get_next_line(&next_gets_char);
+ next_line = get_next_line(&next_gets_char, &last_puts_char, last_gets_char);
linenum++;
/* For every line, go through all the commands */
/* 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)
+ pattern_space, 0, NULL, 0) == 0)
)
);
}
/* Append line to linked list to be printed later */
case 'a':
- append(sed_cmd->string);
+ append(xstrdup(sed_cmd->string));
break;
/* Insert text before this line */
rfile = fopen_for_read(sed_cmd->string);
if (rfile) {
char *line;
-
while ((line = xmalloc_fgetline(rfile))
!= NULL)
append(line);
- xprint_and_close_file(rfile);
+ fclose(rfile);
}
break;
free(pattern_space);
pattern_space = next_line;
last_gets_char = next_gets_char;
- next_line = get_next_line(&next_gets_char);
+ next_line = get_next_line(&next_gets_char, &last_puts_char, last_gets_char);
substituted = 0;
linenum++;
break;
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);
+ next_line = get_next_line(&next_gets_char, &last_puts_char, last_gets_char);
linenum++;
break;
}
/* Delete and such jump here. */
discard_line:
- flush_append();
+ flush_append(&last_puts_char, last_gets_char);
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.
+ * add_cmd() handles this.
*/
static void add_cmd_block(char *cmdstr)
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) {
- overlapping_strcpy(eol - 1, eol);
- eol = strchr(eol, '\n');
- goto next;
- }
+ if (eol)
*eol = '\0';
- }
add_cmd(cmdstr);
cmdstr = eol + 1;
} while (eol);
"file\0" Required_argument "f";
#endif
- int status = EXIT_SUCCESS;
-
INIT_G();
/* destroy command strings on exit */
IF_LONG_OPTS(applet_long_options = sed_longopts);
/* -i must be first, to match OPT_in_place definition */
- opt = getopt32(argv, "i::rne:f:", &opt_i, &opt_e, &opt_f,
+ /* -E is a synonym of -r:
+ * GNU sed 4.2.1 mentions it in neither --help
+ * nor manpage, but does recognize it.
+ */
+ opt = getopt32(argv, "i::rEne:f:", &opt_i, &opt_e, &opt_f,
&G.be_quiet); /* counter for -n */
//argc -= optind;
argv += optind;
if (opt & OPT_in_place) { // -i
atexit(cleanup_outname);
}
- if (opt & 0x2) G.regex_type |= REG_EXTENDED; // -r
- //if (opt & 0x4) G.be_quiet++; // -n
+ if (opt & (2|4))
+ G.regex_type |= REG_EXTENDED; // -r or -E
+ //if (opt & 8)
+ // G.be_quiet++; // -n (implemented with a counter instead)
while (opt_e) { // -e
add_cmd_block(llist_pop(&opt_e));
}
fclose(cmdfile);
}
/* if we didn't get a pattern from -e or -f, use argv[0] */
- if (!(opt & 0x18)) {
+ if (!(opt & 0x30)) {
if (!*argv)
bb_show_usage();
add_cmd_block(*argv++);
/* 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) {
+ G.input_file_list = argv;
+ if (!argv[0]) {
if (opt & OPT_in_place)
bb_error_msg_and_die(bb_msg_requires_arg, "-i");
- add_input_file(stdin);
+ argv[0] = (char*)bb_msg_standard_input;
+ /* G.last_input_file = 0; - already is */
} else {
- int i;
+ goto start;
- for (i = 0; argv[i]; i++) {
+ for (; *argv; argv++) {
struct stat statbuf;
int nonstdoutfd;
- FILE *file;
sed_cmd_t *sed_cmd;
- 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;
- }
- add_input_file(file);
+ G.last_input_file++;
+ start:
if (!(opt & OPT_in_place)) {
+ if (LONE_DASH(*argv)) {
+ *argv = (char*)bb_msg_standard_input;
+ process_files();
+ }
continue;
}
/* -i: process each FILE separately: */
- G.outname = xasprintf("%sXXXXXX", argv[i]);
+ G.outname = xasprintf("%sXXXXXX", *argv);
nonstdoutfd = xmkstemp(G.outname);
G.nonstdout = xfdopen_for_write(nonstdoutfd);
/* Set permissions/owner of output file */
- fstat(fileno(file), &statbuf);
+ stat(*argv, &statbuf);
/* chmod'ing AFTER chown would preserve suid/sgid bits,
* but GNU sed 4.2.1 does not preserve them either */
fchmod(nonstdoutfd, statbuf.st_mode);
G.nonstdout = stdout;
if (opt_i) {
- char *backupname = xasprintf("%s%s", argv[i], opt_i);
- xrename(argv[i], backupname);
+ char *backupname = xasprintf("%s%s", *argv, opt_i);
+ xrename(*argv, backupname);
free(backupname);
}
- /* else unlink(argv[i]); - rename below does this */
- xrename(G.outname, argv[i]); //TODO: rollback backup on error?
+ /* else unlink(*argv); - rename below does this */
+ xrename(G.outname, *argv); //TODO: rollback backup on error?
free(G.outname);
G.outname = NULL;
}
}
/* Here, to handle "sed 'cmds' nonexistent_file" case we did:
- * if (G.current_input_file >= G.input_file_count)
- * return status;
+ * if (G.current_input_file[G.current_input_file] == NULL)
+ * return G.exitcode;
* but it's not needed since process_files() works correctly
* in this case too. */
}
+
process_files();
- return status;
+ return G.exitcode;
}
projects / oweals / busybox.git / blobdiff