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-rw-r--r--i/pc104/initrd/conf/busybox/findutils/grep.c507
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diff --git a/i/pc104/initrd/conf/busybox/findutils/grep.c b/i/pc104/initrd/conf/busybox/findutils/grep.c
new file mode 100644
index 0000000..f6ea54e
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+++ b/i/pc104/initrd/conf/busybox/findutils/grep.c
@@ -0,0 +1,507 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini grep implementation for busybox using libc regex.
+ *
+ * Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley
+ * Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org>
+ *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ */
+/* BB_AUDIT SUSv3 defects - unsupported option -x. */
+/* BB_AUDIT GNU defects - always acts as -a. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/grep.html */
+/*
+ * 2004,2006 (C) Vladimir Oleynik <dzo@simtreas.ru> -
+ * correction "-e pattern1 -e pattern2" logic and more optimizations.
+ * precompiled regex
+ */
+/*
+ * (C) 2006 Jac Goudsmit added -o option
+ */
+
+#include "busybox.h"
+#include "xregex.h"
+
+/* options */
+#define OPTSTR_GREP \
+ "lnqvscFiHhe:f:Lor" \
+ USE_FEATURE_GREP_CONTEXT("A:B:C:") \
+ USE_FEATURE_GREP_EGREP_ALIAS("E") \
+ USE_DESKTOP("w") \
+ "aI"
+/* ignored: -a "assume all files to be text" */
+/* ignored: -I "assume binary files have no matches" */
+
+enum {
+ OPTBIT_l,
+ OPTBIT_n,
+ OPTBIT_q,
+ OPTBIT_v,
+ OPTBIT_s,
+ OPTBIT_c,
+ OPTBIT_F,
+ OPTBIT_i,
+ OPTBIT_H,
+ OPTBIT_h,
+ OPTBIT_e,
+ OPTBIT_f,
+ OPTBIT_L,
+ OPTBIT_o,
+ OPTBIT_r,
+ USE_FEATURE_GREP_CONTEXT(OPTBIT_A ,)
+ USE_FEATURE_GREP_CONTEXT(OPTBIT_B ,)
+ USE_FEATURE_GREP_CONTEXT(OPTBIT_C ,)
+ USE_FEATURE_GREP_CONTEXT(OPTBIT_E ,)
+ USE_DESKTOP( OPTBIT_w ,)
+ OPT_l = 1 << OPTBIT_l,
+ OPT_n = 1 << OPTBIT_n,
+ OPT_q = 1 << OPTBIT_q,
+ OPT_v = 1 << OPTBIT_v,
+ OPT_s = 1 << OPTBIT_s,
+ OPT_c = 1 << OPTBIT_c,
+ OPT_F = 1 << OPTBIT_F,
+ OPT_i = 1 << OPTBIT_i,
+ OPT_H = 1 << OPTBIT_H,
+ OPT_h = 1 << OPTBIT_h,
+ OPT_e = 1 << OPTBIT_e,
+ OPT_f = 1 << OPTBIT_f,
+ OPT_L = 1 << OPTBIT_L,
+ OPT_o = 1 << OPTBIT_o,
+ OPT_r = 1 << OPTBIT_r,
+ OPT_A = USE_FEATURE_GREP_CONTEXT((1 << OPTBIT_A)) + 0,
+ OPT_B = USE_FEATURE_GREP_CONTEXT((1 << OPTBIT_B)) + 0,
+ OPT_C = USE_FEATURE_GREP_CONTEXT((1 << OPTBIT_C)) + 0,
+ OPT_E = USE_FEATURE_GREP_CONTEXT((1 << OPTBIT_E)) + 0,
+ OPT_w = USE_DESKTOP( (1 << OPTBIT_w)) + 0,
+};
+
+#define PRINT_FILES_WITH_MATCHES (option_mask32 & OPT_l)
+#define PRINT_LINE_NUM (option_mask32 & OPT_n)
+#define BE_QUIET (option_mask32 & OPT_q)
+#define SUPPRESS_ERR_MSGS (option_mask32 & OPT_s)
+#define PRINT_MATCH_COUNTS (option_mask32 & OPT_c)
+#define FGREP_FLAG (option_mask32 & OPT_F)
+#define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & OPT_L)
+
+typedef unsigned char byte_t;
+
+static int reflags;
+static byte_t invert_search;
+static byte_t print_filename;
+static byte_t open_errors;
+
+#if ENABLE_FEATURE_GREP_CONTEXT
+static int lines_before;
+static int lines_after;
+static char **before_buf;
+static int last_line_printed;
+#endif /* ENABLE_FEATURE_GREP_CONTEXT */
+
+/* globals used internally */
+static llist_t *pattern_head; /* growable list of patterns to match */
+static const char *cur_file; /* the current file we are reading */
+
+typedef struct grep_list_data_t {
+ char *pattern;
+ regex_t preg;
+#define PATTERN_MEM_A 1
+#define COMPILED 2
+ int flg_mem_alocated_compiled;
+} grep_list_data_t;
+
+static void print_line(const char *line, int linenum, char decoration)
+{
+#if ENABLE_FEATURE_GREP_CONTEXT
+ /* possibly print the little '--' separator */
+ if ((lines_before || lines_after) && last_line_printed &&
+ last_line_printed < linenum - 1) {
+ puts("--");
+ }
+ last_line_printed = linenum;
+#endif
+ if (print_filename)
+ printf("%s%c", cur_file, decoration);
+ if (PRINT_LINE_NUM)
+ printf("%i%c", linenum, decoration);
+ /* Emulate weird GNU grep behavior with -ov */
+ if ((option_mask32 & (OPT_v+OPT_o)) != (OPT_v+OPT_o))
+ puts(line);
+}
+
+static int grep_file(FILE *file)
+{
+ char *line;
+ byte_t ret;
+ int linenum = 0;
+ int nmatches = 0;
+ regmatch_t regmatch;
+#if ENABLE_FEATURE_GREP_CONTEXT
+ int print_n_lines_after = 0;
+ int curpos = 0; /* track where we are in the circular 'before' buffer */
+ int idx = 0; /* used for iteration through the circular buffer */
+#endif /* ENABLE_FEATURE_GREP_CONTEXT */
+
+ while ((line = xmalloc_getline(file)) != NULL) {
+ llist_t *pattern_ptr = pattern_head;
+ grep_list_data_t * gl;
+
+ linenum++;
+ ret = 0;
+ while (pattern_ptr) {
+ gl = (grep_list_data_t *)pattern_ptr->data;
+ if (FGREP_FLAG) {
+ ret = strstr(line, gl->pattern) != NULL;
+ } else {
+ /*
+ * test for a postitive-assertion match (regexec returns success (0)
+ * and the user did not specify invert search), or a negative-assertion
+ * match (regexec returns failure (REG_NOMATCH) and the user specified
+ * invert search)
+ */
+ if (!(gl->flg_mem_alocated_compiled & COMPILED)) {
+ gl->flg_mem_alocated_compiled |= COMPILED;
+ xregcomp(&(gl->preg), gl->pattern, reflags);
+ }
+ regmatch.rm_so = 0;
+ regmatch.rm_eo = 0;
+ if (regexec(&(gl->preg), line, 1, &regmatch, 0) == 0) {
+ if (!(option_mask32 & OPT_w))
+ ret = 1;
+ else {
+ char c = ' ';
+ if (regmatch.rm_so)
+ c = line[regmatch.rm_so - 1];
+ if (!isalnum(c) && c != '_') {
+ c = line[regmatch.rm_eo];
+ if (!c || (!isalnum(c) && c != '_'))
+ ret = 1;
+ }
+ }
+ }
+ }
+ pattern_ptr = pattern_ptr->link;
+ } /* while (pattern_ptr) */
+
+ if (ret ^ invert_search) {
+ if (PRINT_FILES_WITH_MATCHES || BE_QUIET)
+ free(line);
+
+ /* if we found a match but were told to be quiet, stop here */
+ if (BE_QUIET || PRINT_FILES_WITHOUT_MATCHES)
+ return -1;
+
+ /* keep track of matches */
+ nmatches++;
+
+ /* if we're just printing filenames, we stop after the first match */
+ if (PRINT_FILES_WITH_MATCHES)
+ break;
+
+ /* print the matched line */
+ if (PRINT_MATCH_COUNTS == 0) {
+#if ENABLE_FEATURE_GREP_CONTEXT
+ int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;
+
+ /* if we were told to print 'before' lines and there is at least
+ * one line in the circular buffer, print them */
+ if (lines_before && before_buf[prevpos] != NULL) {
+ int first_buf_entry_line_num = linenum - lines_before;
+
+ /* advance to the first entry in the circular buffer, and
+ * figure out the line number is of the first line in the
+ * buffer */
+ idx = curpos;
+ while (before_buf[idx] == NULL) {
+ idx = (idx + 1) % lines_before;
+ first_buf_entry_line_num++;
+ }
+
+ /* now print each line in the buffer, clearing them as we go */
+ while (before_buf[idx] != NULL) {
+ print_line(before_buf[idx], first_buf_entry_line_num, '-');
+ free(before_buf[idx]);
+ before_buf[idx] = NULL;
+ idx = (idx + 1) % lines_before;
+ first_buf_entry_line_num++;
+ }
+ }
+
+ /* make a note that we need to print 'after' lines */
+ print_n_lines_after = lines_after;
+#endif
+ if (option_mask32 & OPT_o) {
+ line[regmatch.rm_eo] = '\0';
+ print_line(line + regmatch.rm_so, linenum, ':');
+ } else {
+ print_line(line, linenum, ':');
+ }
+ }
+ }
+#if ENABLE_FEATURE_GREP_CONTEXT
+ else { /* no match */
+ /* Add the line to the circular 'before' buffer */
+ if (lines_before) {
+ free(before_buf[curpos]);
+ before_buf[curpos] = xstrdup(line);
+ curpos = (curpos + 1) % lines_before;
+ }
+ }
+
+ /* if we need to print some context lines after the last match, do so */
+ if (print_n_lines_after && (last_line_printed != linenum)) {
+ print_line(line, linenum, '-');
+ print_n_lines_after--;
+ }
+#endif /* ENABLE_FEATURE_GREP_CONTEXT */
+ free(line);
+ }
+
+ /* special-case file post-processing for options where we don't print line
+ * matches, just filenames and possibly match counts */
+
+ /* grep -c: print [filename:]count, even if count is zero */
+ if (PRINT_MATCH_COUNTS) {
+ if (print_filename)
+ printf("%s:", cur_file);
+ printf("%d\n", nmatches);
+ }
+
+ /* grep -l: print just the filename, but only if we grepped the line in the file */
+ if (PRINT_FILES_WITH_MATCHES && nmatches > 0) {
+ puts(cur_file);
+ }
+
+ /* grep -L: print just the filename, but only if we didn't grep the line in the file */
+ if (PRINT_FILES_WITHOUT_MATCHES && nmatches == 0) {
+ puts(cur_file);
+ }
+
+ return nmatches;
+}
+
+#if ENABLE_FEATURE_CLEAN_UP
+#define new_grep_list_data(p, m) add_grep_list_data(p, m)
+static char * add_grep_list_data(char *pattern, int flg_used_mem)
+#else
+#define new_grep_list_data(p, m) add_grep_list_data(p)
+static char * add_grep_list_data(char *pattern)
+#endif
+{
+ grep_list_data_t *gl = xmalloc(sizeof(grep_list_data_t));
+ gl->pattern = pattern;
+#if ENABLE_FEATURE_CLEAN_UP
+ gl->flg_mem_alocated_compiled = flg_used_mem;
+#else
+ gl->flg_mem_alocated_compiled = 0;
+#endif
+ return (char *)gl;
+}
+
+
+static void load_regexes_from_file(llist_t *fopt)
+{
+ char *line;
+ FILE *f;
+
+ while (fopt) {
+ llist_t *cur = fopt;
+ char *ffile = cur->data;
+
+ fopt = cur->link;
+ free(cur);
+ f = xfopen(ffile, "r");
+ while ((line = xmalloc_getline(f)) != NULL) {
+ llist_add_to(&pattern_head,
+ new_grep_list_data(line, PATTERN_MEM_A));
+ }
+ }
+}
+
+static int file_action_grep(const char *filename, struct stat *statbuf, void* matched, int depth)
+{
+ FILE *file = fopen(filename, "r");
+ if (file == NULL) {
+ if (!SUPPRESS_ERR_MSGS)
+ bb_perror_msg("%s", cur_file);
+ open_errors = 1;
+ return 0;
+ }
+ cur_file = filename;
+ *(int*)matched += grep_file(file);
+ fclose(file);
+ return 1;
+}
+
+static int grep_dir(const char *dir)
+{
+ int matched = 0;
+ recursive_action(dir,
+ /* recurse= */ 1,
+ /* followLinks= */ 0,
+ /* depthFirst= */ 1,
+ /* fileAction= */ file_action_grep,
+ /* dirAction= */ NULL,
+ /* userData= */ &matched,
+ /* depth= */ 0);
+ return matched;
+}
+
+int grep_main(int argc, char **argv);
+int grep_main(int argc, char **argv)
+{
+ FILE *file;
+ int matched;
+ llist_t *fopt = NULL;
+
+ /* do normal option parsing */
+#if ENABLE_FEATURE_GREP_CONTEXT
+ char *slines_after;
+ char *slines_before;
+ char *Copt;
+
+ opt_complementary = "H-h:e::f::C-AB";
+ getopt32(argc, argv,
+ OPTSTR_GREP,
+ &pattern_head, &fopt,
+ &slines_after, &slines_before, &Copt);
+
+ if (option_mask32 & OPT_C) {
+ /* -C unsets prev -A and -B, but following -A or -B
+ may override it */
+ if (!(option_mask32 & OPT_A)) /* not overridden */
+ slines_after = Copt;
+ if (!(option_mask32 & OPT_B)) /* not overridden */
+ slines_before = Copt;
+ option_mask32 |= OPT_A|OPT_B; /* for parser */
+ }
+ if (option_mask32 & OPT_A) {
+ lines_after = xatoi_u(slines_after);
+ }
+ if (option_mask32 & OPT_B) {
+ lines_before = xatoi_u(slines_before);
+ }
+ /* sanity checks */
+ if (option_mask32 & (OPT_c|OPT_q|OPT_l|OPT_L)) {
+ option_mask32 &= ~OPT_n;
+ lines_before = 0;
+ lines_after = 0;
+ } else if (lines_before > 0)
+ before_buf = xzalloc(lines_before * sizeof(char *));
+#else
+ /* with auto sanity checks */
+ opt_complementary = "H-h:e::f::c-n:q-n:l-n";
+ getopt32(argc, argv, OPTSTR_GREP,
+ &pattern_head, &fopt);
+#endif
+ invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
+
+ if (pattern_head != NULL) {
+ /* convert char *argv[] to grep_list_data_t */
+ llist_t *cur;
+
+ for (cur = pattern_head; cur; cur = cur->link)
+ cur->data = new_grep_list_data(cur->data, 0);
+ }
+ if (option_mask32 & OPT_f)
+ load_regexes_from_file(fopt);
+
+ if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')
+ option_mask32 |= OPT_F;
+
+ if (!(option_mask32 & (OPT_o | OPT_w)))
+ reflags = REG_NOSUB;
+
+ if (ENABLE_FEATURE_GREP_EGREP_ALIAS &&
+ (applet_name[0] == 'e' || (option_mask32 & OPT_E)))
+ reflags |= REG_EXTENDED;
+
+ if (option_mask32 & OPT_i)
+ reflags |= REG_ICASE;
+
+ argv += optind;
+ argc -= optind;
+
+ /* if we didn't get a pattern from a -e and no command file was specified,
+ * argv[optind] should be the pattern. no pattern, no worky */
+ if (pattern_head == NULL) {
+ char *pattern;
+ if (*argv == NULL)
+ bb_show_usage();
+ pattern = new_grep_list_data(*argv++, 0);
+ llist_add_to(&pattern_head, pattern);
+ argc--;
+ }
+
+ /* argv[(optind)..(argc-1)] should be names of file to grep through. If
+ * there is more than one file to grep, we will print the filenames. */
+ if (argc > 1)
+ print_filename = 1;
+ /* -H / -h of course override */
+ if (option_mask32 & OPT_H)
+ print_filename = 1;
+ if (option_mask32 & OPT_h)
+ print_filename = 0;
+
+ /* If no files were specified, or '-' was specified, take input from
+ * stdin. Otherwise, we grep through all the files specified. */
+ if (argc == 0)
+ argc++;
+ matched = 0;
+ while (argc--) {
+ cur_file = *argv++;
+ file = stdin;
+ if (!cur_file || (*cur_file == '-' && !cur_file[1])) {
+ cur_file = "(standard input)";
+ } else {
+ if (option_mask32 & OPT_r) {
+ struct stat st;
+ if (stat(cur_file, &st) == 0 && S_ISDIR(st.st_mode)) {
+ if (!(option_mask32 & OPT_h))
+ print_filename = 1;
+ matched += grep_dir(cur_file);
+ goto grep_done;
+ }
+ }
+ /* else: fopen(dir) will succeed, but reading won't */
+ file = fopen(cur_file, "r");
+ if (file == NULL) {
+ if (!SUPPRESS_ERR_MSGS)
+ bb_perror_msg("%s", cur_file);
+ open_errors = 1;
+ continue;
+ }
+ }
+ matched += grep_file(file);
+ fclose_if_not_stdin(file);
+ grep_done:
+ if (matched < 0) {
+ /* we found a match but were told to be quiet, stop here and
+ * return success */
+ break;
+ }
+ }
+
+ /* destroy all the elments in the pattern list */
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ while (pattern_head) {
+ llist_t *pattern_head_ptr = pattern_head;
+ grep_list_data_t *gl =
+ (grep_list_data_t *)pattern_head_ptr->data;
+
+ pattern_head = pattern_head->link;
+ if ((gl->flg_mem_alocated_compiled & PATTERN_MEM_A))
+ free(gl->pattern);
+ if ((gl->flg_mem_alocated_compiled & COMPILED))
+ regfree(&(gl->preg));
+ free(pattern_head_ptr);
+ }
+ }
+ /* 0 = success, 1 = failed, 2 = error */
+ /* If the -q option is specified, the exit status shall be zero
+ * if an input line is selected, even if an error was detected. */
+ if (BE_QUIET && matched)
+ return 0;
+ if (open_errors)
+ return 2;
+ return !matched; /* invert return value 0 = success, 1 = failed */
+}