Пример #1
0
static void sed_free_and_close_stuff(void)
{
	sed_cmd_t *sed_cmd = G.sed_cmd_head;

	llist_free(G.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;
	}

	free(G.hold_space);

	while (G.current_input_file < G.input_file_count)
		fclose(G.input_file_list[G.current_input_file++]);
}
Пример #2
0
int lsmod_main(int argc, char **argv)
{
	FILE *file = xfopen("/proc/modules", "r");

	printf("Module                  Size  Used by");
	check_tainted();
#if defined(CONFIG_FEATURE_LSMOD_PRETTY_2_6_OUTPUT)
	{
		char *line;
		while ((line = xmalloc_fgets(file)) != NULL) {
			char *tok;

			tok = strtok(line, " \t");
			printf("%-19s", tok);
			tok = strtok(NULL, " \t\n");
			printf(" %8s", tok);
			tok = strtok(NULL, " \t\n");
			/* Null if no module unloading support. */
			if (tok) {
				printf("  %s", tok);
				tok = strtok(NULL, "\n");
				if (!tok)
					tok = (char*)"";
				/* New-style has commas, or -.  If so,
				truncate (other fields might follow). */
				else if (strchr(tok, ',')) {
					tok = strtok(tok, "\t ");
					/* Strip trailing comma. */
					if (tok[strlen(tok)-1] == ',')
						tok[strlen(tok)-1] = '\0';
				} else if (tok[0] == '-'
				 && (tok[1] == '\0' || isspace(tok[1]))
				) {
					tok = (char*)"";
				}
				printf(" %s", tok);
			}
			puts("");
			free(line);
		}
		fclose(file);
	}
#else
	xprint_and_close_file(file);
#endif  /*  CONFIG_FEATURE_2_6_MODULES  */
	return EXIT_SUCCESS;
}
Пример #3
0
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++;

	/* For every line, go through all the commands */
 restart:
	for (sed_cmd = G.sed_cmd_head; sed_cmd; sed_cmd = sed_cmd->next) {
		int old_matched, matched;

		old_matched = sed_cmd->in_match;

		/* Determine if this command matches this line: */

		dbg("match1:%d", sed_cmd->in_match);
		dbg("match2:%d", (!sed_cmd->beg_line && !sed_cmd->end_line
				&& !sed_cmd->beg_match && !sed_cmd->end_match));
		dbg("match3:%d", (sed_cmd->beg_line > 0
			&& (sed_cmd->end_line || sed_cmd->end_match
			    ? (sed_cmd->beg_line <= linenum)
			    : (sed_cmd->beg_line == linenum)
			    )
			));
		dbg("match4:%d", (beg_match(sed_cmd, pattern_space)));
		dbg("match5:%d", (sed_cmd->beg_line == -1 && next_line == NULL));

		/* 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->end_line || sed_cmd->end_match
				  /* note: even if end is numeric and is < linenum too,
				   * GNU sed matches! We match too, therefore we don't
				   * check here that linenum <= end.
				   * Example:
				   * printf '1\n2\n3\n4\n' | sed -n '1{N;N;d};1p;2,3p;3p;4p'
				   * first three input lines are deleted;
				   * 4th line is matched and printed
				   * by "2,3" (!) and by "4" ranges
				   */
				? (sed_cmd->beg_line <= linenum)    /* N,end */
				: (sed_cmd->beg_line == linenum)    /* N */
				)
			    )
			/* Or does this line match our begin address regex? */
			|| (beg_match(sed_cmd, pattern_space))
			/* Or did we match last line of input? */
			|| (sed_cmd->beg_line == -1 && next_line == NULL);

		/* Snapshot the value */
		matched = sed_cmd->in_match;

		dbg("cmd:'%c' matched:%d beg_line:%d end_line:%d linenum:%d",
			sed_cmd->cmd, matched, sed_cmd->beg_line, sed_cmd->end_line, linenum);

		/* Is this line the end of the current match? */

		if (matched) {
			/* once matched, "n,xxx" range is dead, disabling it */
			if (sed_cmd->beg_line > 0) {
				sed_cmd->beg_line = -2;
			}
			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) {
				unsigned nest_cnt = 0;
				while (1) {
					if (sed_cmd->cmd == '{')
						nest_cnt++;
					if (sed_cmd->cmd == '}') {
						nest_cnt--;
						if (nest_cnt == 0)
							break;
					}
					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)
			continue; /* no */

		/* Update last used regex in case a blank substitute BRE is found */
		if (sed_cmd->beg_match) {
			G.previous_regex_ptr = sed_cmd->beg_match;
		}

		/* actual sedding */
		dbg("pattern_space:'%s' next_line:'%s' cmd:%c",
				pattern_space, next_line, sed_cmd->cmd);
		switch (sed_cmd->cmd) {

		/* Print line number */
		case '=':
			fprintf(G.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) {
				overlapping_strcpy(pattern_space, tmp + 1);
				goto restart;
			}
		}
		/* discard this line. */
		case 'd':
			goto discard_line;

		/* Substitute with regex */
		case 's':
			if (!do_subst_command(sed_cmd, &pattern_space))
				break;
			dbg("do_subst_command succeeded:'%s'", pattern_space);
			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, '\n');
			goto discard_line;

		/* Read file, append contents to output */
		case 'r':
		{
			FILE *rfile;
			rfile = fopen_for_read(sed_cmd->string);
			if (rfile) {
				char *line;

				while ((line = xmalloc_fgetline(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 (!G.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);
				substituted = 0;
				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. */
			/* http://www.gnu.org/software/sed/manual/sed.html:
			 * "Most versions of sed exit without printing anything
			 * when the N command is issued on the last line of
			 * a file. GNU sed prints pattern space before exiting
			 * unless of course the -n command switch has been
			 * specified. This choice is by design."
			 */
			if (next_line == NULL) {
				//goto discard_line;
				goto discard_commands; /* GNU behavior */
			}
			/* Append next_line, read new next_line. */
			len = strlen(pattern_space);
			pattern_space = xrealloc(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(G.hold_space ? G.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 (G.hold_space)
				hold_space_size = strlen(G.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 (G.hold_space)
				strcat(pattern_space, G.hold_space);
			last_gets_char = '\n';

			break;
		}
		case 'h':	/* Replace hold space with pattern space */
			free(G.hold_space);
			G.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 (G.hold_space)
				hold_space_size += strlen(G.hold_space);
			if (pattern_space)
				pattern_space_size = strlen(pattern_space);
			G.hold_space = xrealloc(G.hold_space,
					hold_space_size + pattern_space_size);

			if (hold_space_size == 2)
				*G.hold_space = 0;
			strcat(G.hold_space, "\n");
			if (pattern_space)
				strcat(G.hold_space, pattern_space);

			break;
		}
		case 'x': /* Exchange hold and pattern space */
		{
			char *tmp = pattern_space;
			pattern_space = G.hold_space ? G.hold_space : xzalloc(1);
			last_gets_char = '\n';
			G.hold_space = tmp;
			break;
		}
		} /* switch */
	} /* for each cmd */

	/*
	 * 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 (!G.be_quiet)
		sed_puts(pattern_space, last_gets_char);

	/* Delete and such jump here. */
 discard_line:
	flush_append();
	free(pattern_space);

	goto again;
}
Пример #4
0
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 = G.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? */
			|| (beg_match(sed_cmd, pattern_space))
			/* 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) {
				G.previous_regex_ptr = sed_cmd->beg_match;
			}

			/* actual sedding */
			switch (sed_cmd->cmd) {

			/* Print line number */
			case '=':
				fprintf(G.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_fgetline(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 (!G.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);
					substituted = 0;
					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(G.hold_space ? G.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 (G.hold_space)
					hold_space_size = strlen(G.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 (G.hold_space)
					strcat(pattern_space, G.hold_space);
				last_gets_char = '\n';

				break;
			}
			case 'h':	/* Replace hold space with pattern space */
				free(G.hold_space);
				G.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 (G.hold_space)
					hold_space_size += strlen(G.hold_space);
				if (pattern_space)
					pattern_space_size = strlen(pattern_space);
				G.hold_space = xrealloc(G.hold_space,
						hold_space_size + pattern_space_size);

				if (hold_space_size == 2)
					*G.hold_space = 0;
				strcat(G.hold_space, "\n");
				if (pattern_space)
					strcat(G.hold_space, pattern_space);

				break;
			}
			case 'x': /* Exchange hold and pattern space */
			{
				char *tmp = pattern_space;
				pattern_space = G.hold_space ? : xzalloc(1);
				last_gets_char = '\n';
				G.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 (!G.be_quiet)
		sed_puts(pattern_space, last_gets_char);

	/* Delete and such jump here. */
 discard_line:
	flush_append();
	free(pattern_space);

	goto again;
}