mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-11-24 20:29:55 +00:00
Added support for grep -e and grep -f, closes bug #1164. Also added some
testcases for these new features.
This commit is contained in:
Mark Whitley
parent
04052f96e1
commit
fa43e54b6f
225
findutils/grep.c
225
findutils/grep.c
@ -34,13 +34,13 @@ extern int errno; /* for use with strerror() */
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extern void xregcomp(regex_t *preg, const char *regex, int cflags); /* in busybox.h */
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/* options */
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static int ignore_case = 0;
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static int print_filename = 0;
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static int print_line_num = 0;
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static int print_match_counts = 0;
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static int be_quiet = 0;
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static int invert_search = 0;
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static int suppress_err_msgs = 0;
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static int reflags = REG_NOSUB;
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static int print_filename = 0;
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static int print_line_num = 0;
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static int print_match_counts = 0;
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static int be_quiet = 0;
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static int invert_search = 0;
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static int suppress_err_msgs = 0;
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static int print_files_with_matches = 0;
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#ifdef BB_FEATURE_GREP_CONTEXT
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@ -52,10 +52,12 @@ static int last_line_printed = 0;
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#endif /* BB_FEATURE_GREP_CONTEXT */
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/* globals used internally */
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static regex_t regex; /* storage space for compiled regular expression */
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static regex_t *regexes = NULL; /* growable array of compiled regular expressions */
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static int nregexes = 0; /* number of elements in above arrary */
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static int matched; /* keeps track of whether we ever matched */
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static char *cur_file = NULL; /* the current file we are reading */
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static void print_line(const char *line, int linenum, char decoration)
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{
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#ifdef BB_FEATURE_GREP_CONTEXT
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@ -73,12 +75,14 @@ static void print_line(const char *line, int linenum, char decoration)
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puts(line);
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}
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static void grep_file(FILE *file)
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{
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char *line = NULL;
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int ret;
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int linenum = 0;
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int nmatches = 0;
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int i;
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#ifdef BB_FEATURE_GREP_CONTEXT
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int print_n_lines_after = 0;
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int curpos = 0; /* track where we are in the circular 'before' buffer */
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@ -89,81 +93,81 @@ static void grep_file(FILE *file)
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chomp(line);
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linenum++;
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/*
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* test for a postitive-assertion match (regexec returns success (0)
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* and the user did not specify invert search), or a negative-assertion
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* match (regexec returns failure (REG_NOMATCH) and the user specified
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* invert search)
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*/
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ret = regexec(®ex, line, 0, NULL, 0);
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if ((ret == 0 && !invert_search) || (ret == REG_NOMATCH && invert_search)) {
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for (i = 0; i < nregexes; i++) {
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/*
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* test for a postitive-assertion match (regexec returns success (0)
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* and the user did not specify invert search), or a negative-assertion
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* match (regexec returns failure (REG_NOMATCH) and the user specified
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* invert search)
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*/
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ret = regexec(®exes[i], line, 0, NULL, 0);
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if ((ret == 0 && !invert_search) || (ret == REG_NOMATCH && invert_search)) {
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/* if we found a match but were told to be quiet, stop here and
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* return success */
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if (be_quiet) {
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regfree(®ex);
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exit(0);
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}
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/* if we found a match but were told to be quiet, stop here and
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* return success */
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if (be_quiet)
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exit(0);
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/* keep track of matches */
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nmatches++;
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/* keep track of matches */
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nmatches++;
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/* if we're just printing filenames, we stop after the first match */
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if (print_files_with_matches)
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break;
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/* if we're just printing filenames, we stop after the first match */
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if (print_files_with_matches)
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break;
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/* print the matched line */
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if (print_match_counts == 0) {
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/* print the matched line */
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if (print_match_counts == 0) {
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#ifdef BB_FEATURE_GREP_CONTEXT
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int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;
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int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;
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/* if we were told to print 'before' lines and there is at least
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* one line in the circular buffer, print them */
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if (lines_before && before_buf[prevpos] != NULL) {
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int first_buf_entry_line_num = linenum - lines_before;
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/* if we were told to print 'before' lines and there is at least
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* one line in the circular buffer, print them */
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if (lines_before && before_buf[prevpos] != NULL) {
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int first_buf_entry_line_num = linenum - lines_before;
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/* advance to the first entry in the circular buffer, and
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* figure out the line number is of the first line in the
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* buffer */
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idx = curpos;
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while (before_buf[idx] == NULL) {
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idx = (idx + 1) % lines_before;
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first_buf_entry_line_num++;
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/* advance to the first entry in the circular buffer, and
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* figure out the line number is of the first line in the
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* buffer */
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idx = curpos;
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while (before_buf[idx] == NULL) {
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idx = (idx + 1) % lines_before;
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first_buf_entry_line_num++;
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}
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/* now print each line in the buffer, clearing them as we go */
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while (before_buf[idx] != NULL) {
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print_line(before_buf[idx], first_buf_entry_line_num, '-');
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free(before_buf[idx]);
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before_buf[idx] = NULL;
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idx = (idx + 1) % lines_before;
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first_buf_entry_line_num++;
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}
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}
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/* now print each line in the buffer, clearing them as we go */
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while (before_buf[idx] != NULL) {
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print_line(before_buf[idx], first_buf_entry_line_num, '-');
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free(before_buf[idx]);
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before_buf[idx] = NULL;
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idx = (idx + 1) % lines_before;
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first_buf_entry_line_num++;
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}
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/* make a note that we need to print 'after' lines */
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print_n_lines_after = lines_after;
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#endif /* BB_FEATURE_GREP_CONTEXT */
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print_line(line, linenum, ':');
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}
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/* make a note that we need to print 'after' lines */
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print_n_lines_after = lines_after;
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#endif /* BB_FEATURE_GREP_CONTEXT */
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print_line(line, linenum, ':');
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}
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}
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#ifdef BB_FEATURE_GREP_CONTEXT
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else { /* no match */
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/* Add the line to the circular 'before' buffer */
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if(lines_before) {
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if(before_buf[curpos])
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free(before_buf[curpos]);
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before_buf[curpos] = strdup(line);
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curpos = (curpos + 1) % lines_before;
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else { /* no match */
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/* Add the line to the circular 'before' buffer */
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if(lines_before) {
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if(before_buf[curpos])
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free(before_buf[curpos]);
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before_buf[curpos] = strdup(line);
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curpos = (curpos + 1) % lines_before;
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}
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}
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}
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/* if we need to print some context lines after the last match, do so */
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if (print_n_lines_after && (last_line_printed != linenum)) {
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print_line(line, linenum, '-');
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print_n_lines_after--;
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}
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/* if we need to print some context lines after the last match, do so */
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if (print_n_lines_after && (last_line_printed != linenum)) {
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print_line(line, linenum, '-');
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print_n_lines_after--;
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}
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#endif /* BB_FEATURE_GREP_CONTEXT */
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} /* for */
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free(line);
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}
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@ -189,23 +193,63 @@ static void grep_file(FILE *file)
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matched = 1;
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}
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static void add_regex(const char *restr)
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{
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regexes = xrealloc(regexes, sizeof(regex_t) * (++nregexes));
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xregcomp(®exes[nregexes-1], restr, reflags);
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}
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static void load_regexes_from_file(const char *filename)
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{
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char *line;
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FILE *f = xfopen(filename, "r");
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while ((line = get_line_from_file(f)) != NULL) {
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chomp(line);
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add_regex(line);
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free(line);
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}
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}
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#ifdef BB_FEATURE_CLEAN_UP
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static void destroy_regexes()
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{
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if (regexes == NULL)
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return;
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/* destroy all the elments in the array */
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while (--nregexes >= 0) {
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regfree(regexes[nregexes]);
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free(regexes[nregexes]);
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}
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}
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#endif
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extern int grep_main(int argc, char **argv)
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{
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int opt;
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int reflags;
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#ifdef BB_FEATURE_GREP_CONTEXT
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char *junk;
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#endif
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#ifdef BB_FEATURE_CLEAN_UP
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/* destroy command strings on exit */
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if (atexit(destroy_regexes) == -1)
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perror_msg_and_die("atexit");
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#endif
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/* do normal option parsing */
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while ((opt = getopt(argc, argv, "iHhlnqvsc"
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while ((opt = getopt(argc, argv, "iHhlnqvsce:f:"
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#ifdef BB_FEATURE_GREP_CONTEXT
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"A:B:C:"
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#endif
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)) > 0) {
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switch (opt) {
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case 'i':
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ignore_case++;
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reflags |= REG_ICASE;
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break;
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case 'l':
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print_files_with_matches++;
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@ -231,6 +275,12 @@ extern int grep_main(int argc, char **argv)
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case 'c':
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print_match_counts++;
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break;
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case 'e':
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add_regex(optarg);
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break;
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case 'f':
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load_regexes_from_file(optarg);
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break;
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#ifdef BB_FEATURE_GREP_CONTEXT
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case 'A':
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lines_after = strtoul(optarg, &junk, 10);
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@ -255,11 +305,18 @@ extern int grep_main(int argc, char **argv)
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}
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}
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/* argv[optind] should be the regex pattern; no pattern, no worky */
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if (argv[optind] == NULL)
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show_usage();
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/* if we didn't get a pattern from a -e and no command file was specified,
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* argv[optind] should be the pattern. no pattern, no worky */
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if (nregexes == 0) {
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if (argv[optind] == NULL)
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show_usage();
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else {
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add_regex(argv[optind]);
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optind++;
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}
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}
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/* sanity check */
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/* sanity checks */
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if (print_match_counts || be_quiet || print_files_with_matches) {
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print_line_num = 0;
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#ifdef BB_FEATURE_GREP_CONTEXT
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@ -268,28 +325,20 @@ extern int grep_main(int argc, char **argv)
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#endif
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}
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/* compile the regular expression
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* we're not going to mess with sub-expressions, and we need to
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* treat newlines right. */
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reflags = REG_NOSUB;
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if (ignore_case)
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reflags |= REG_ICASE;
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xregcomp(®ex, argv[optind], reflags);
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/* argv[(optind+1)..(argc-1)] should be names of file to grep through. If
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/* argv[(optind)..(argc-1)] should be names of file to grep through. If
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* there is more than one file to grep, we will print the filenames */
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if ((argc-1) - (optind+1) > 0)
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if ((argc-1) - (optind) > 0)
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print_filename++;
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/* If no files were specified, or '-' was specified, take input from
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* stdin. Otherwise, we grep through all the files specified. */
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if (argv[optind+1] == NULL || (strcmp(argv[optind+1], "-") == 0)) {
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if (argv[optind] == NULL || (strcmp(argv[optind], "-") == 0)) {
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grep_file(stdin);
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}
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else {
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int i;
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FILE *file;
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for (i = optind + 1; i < argc; i++) {
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for (i = optind; i < argc; i++) {
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cur_file = argv[i];
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file = fopen(cur_file, "r");
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if (file == NULL) {
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@ -303,7 +352,5 @@ extern int grep_main(int argc, char **argv)
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}
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}
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regfree(®ex);
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return !matched; /* invert return value 0 = success, 1 = failed */
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}
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225
grep.c
225
grep.c
@ -34,13 +34,13 @@ extern int errno; /* for use with strerror() */
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extern void xregcomp(regex_t *preg, const char *regex, int cflags); /* in busybox.h */
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/* options */
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static int ignore_case = 0;
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static int print_filename = 0;
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static int print_line_num = 0;
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static int print_match_counts = 0;
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static int be_quiet = 0;
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static int invert_search = 0;
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static int suppress_err_msgs = 0;
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static int reflags = REG_NOSUB;
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static int print_filename = 0;
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static int print_line_num = 0;
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static int print_match_counts = 0;
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static int be_quiet = 0;
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static int invert_search = 0;
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static int suppress_err_msgs = 0;
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static int print_files_with_matches = 0;
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#ifdef BB_FEATURE_GREP_CONTEXT
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@ -52,10 +52,12 @@ static int last_line_printed = 0;
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#endif /* BB_FEATURE_GREP_CONTEXT */
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/* globals used internally */
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static regex_t regex; /* storage space for compiled regular expression */
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static regex_t *regexes = NULL; /* growable array of compiled regular expressions */
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static int nregexes = 0; /* number of elements in above arrary */
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static int matched; /* keeps track of whether we ever matched */
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static char *cur_file = NULL; /* the current file we are reading */
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static void print_line(const char *line, int linenum, char decoration)
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{
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#ifdef BB_FEATURE_GREP_CONTEXT
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@ -73,12 +75,14 @@ static void print_line(const char *line, int linenum, char decoration)
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puts(line);
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}
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static void grep_file(FILE *file)
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{
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char *line = NULL;
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int ret;
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int linenum = 0;
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int nmatches = 0;
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int i;
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#ifdef BB_FEATURE_GREP_CONTEXT
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int print_n_lines_after = 0;
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int curpos = 0; /* track where we are in the circular 'before' buffer */
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@ -89,81 +93,81 @@ static void grep_file(FILE *file)
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chomp(line);
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linenum++;
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/*
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* test for a postitive-assertion match (regexec returns success (0)
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* and the user did not specify invert search), or a negative-assertion
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* match (regexec returns failure (REG_NOMATCH) and the user specified
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* invert search)
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*/
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ret = regexec(®ex, line, 0, NULL, 0);
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if ((ret == 0 && !invert_search) || (ret == REG_NOMATCH && invert_search)) {
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for (i = 0; i < nregexes; i++) {
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/*
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* test for a postitive-assertion match (regexec returns success (0)
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* and the user did not specify invert search), or a negative-assertion
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* match (regexec returns failure (REG_NOMATCH) and the user specified
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* invert search)
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*/
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ret = regexec(®exes[i], line, 0, NULL, 0);
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if ((ret == 0 && !invert_search) || (ret == REG_NOMATCH && invert_search)) {
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/* if we found a match but were told to be quiet, stop here and
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* return success */
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if (be_quiet) {
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regfree(®ex);
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exit(0);
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}
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/* if we found a match but were told to be quiet, stop here and
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* return success */
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if (be_quiet)
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exit(0);
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/* keep track of matches */
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nmatches++;
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/* keep track of matches */
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nmatches++;
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/* if we're just printing filenames, we stop after the first match */
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if (print_files_with_matches)
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break;
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/* if we're just printing filenames, we stop after the first match */
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if (print_files_with_matches)
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break;
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/* print the matched line */
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if (print_match_counts == 0) {
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/* print the matched line */
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if (print_match_counts == 0) {
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#ifdef BB_FEATURE_GREP_CONTEXT
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int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;
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int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;
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|
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/* if we were told to print 'before' lines and there is at least
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* one line in the circular buffer, print them */
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if (lines_before && before_buf[prevpos] != NULL) {
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int first_buf_entry_line_num = linenum - lines_before;
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/* if we were told to print 'before' lines and there is at least
|
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* one line in the circular buffer, print them */
|
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if (lines_before && before_buf[prevpos] != NULL) {
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int first_buf_entry_line_num = linenum - lines_before;
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/* advance to the first entry in the circular buffer, and
|
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* figure out the line number is of the first line in the
|
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* buffer */
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idx = curpos;
|
||||
while (before_buf[idx] == NULL) {
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idx = (idx + 1) % lines_before;
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||||
first_buf_entry_line_num++;
|
||||
/* 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++;
|
||||
}
|
||||
}
|
||||
|
||||
/* 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 /* BB_FEATURE_GREP_CONTEXT */
|
||||
print_line(line, linenum, ':');
|
||||
}
|
||||
|
||||
/* make a note that we need to print 'after' lines */
|
||||
print_n_lines_after = lines_after;
|
||||
#endif /* BB_FEATURE_GREP_CONTEXT */
|
||||
print_line(line, linenum, ':');
|
||||
}
|
||||
}
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
else { /* no match */
|
||||
/* Add the line to the circular 'before' buffer */
|
||||
if(lines_before) {
|
||||
if(before_buf[curpos])
|
||||
free(before_buf[curpos]);
|
||||
before_buf[curpos] = strdup(line);
|
||||
curpos = (curpos + 1) % lines_before;
|
||||
else { /* no match */
|
||||
/* Add the line to the circular 'before' buffer */
|
||||
if(lines_before) {
|
||||
if(before_buf[curpos])
|
||||
free(before_buf[curpos]);
|
||||
before_buf[curpos] = strdup(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--;
|
||||
}
|
||||
/* 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 /* BB_FEATURE_GREP_CONTEXT */
|
||||
} /* for */
|
||||
free(line);
|
||||
}
|
||||
|
||||
@ -189,23 +193,63 @@ static void grep_file(FILE *file)
|
||||
matched = 1;
|
||||
}
|
||||
|
||||
|
||||
static void add_regex(const char *restr)
|
||||
{
|
||||
regexes = xrealloc(regexes, sizeof(regex_t) * (++nregexes));
|
||||
xregcomp(®exes[nregexes-1], restr, reflags);
|
||||
}
|
||||
|
||||
|
||||
static void load_regexes_from_file(const char *filename)
|
||||
{
|
||||
char *line;
|
||||
FILE *f = xfopen(filename, "r");
|
||||
while ((line = get_line_from_file(f)) != NULL) {
|
||||
chomp(line);
|
||||
add_regex(line);
|
||||
free(line);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#ifdef BB_FEATURE_CLEAN_UP
|
||||
static void destroy_regexes()
|
||||
{
|
||||
if (regexes == NULL)
|
||||
return;
|
||||
|
||||
/* destroy all the elments in the array */
|
||||
while (--nregexes >= 0) {
|
||||
regfree(regexes[nregexes]);
|
||||
free(regexes[nregexes]);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
extern int grep_main(int argc, char **argv)
|
||||
{
|
||||
int opt;
|
||||
int reflags;
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
char *junk;
|
||||
#endif
|
||||
|
||||
#ifdef BB_FEATURE_CLEAN_UP
|
||||
/* destroy command strings on exit */
|
||||
if (atexit(destroy_regexes) == -1)
|
||||
perror_msg_and_die("atexit");
|
||||
#endif
|
||||
|
||||
/* do normal option parsing */
|
||||
while ((opt = getopt(argc, argv, "iHhlnqvsc"
|
||||
while ((opt = getopt(argc, argv, "iHhlnqvsce:f:"
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
"A:B:C:"
|
||||
#endif
|
||||
)) > 0) {
|
||||
switch (opt) {
|
||||
case 'i':
|
||||
ignore_case++;
|
||||
reflags |= REG_ICASE;
|
||||
break;
|
||||
case 'l':
|
||||
print_files_with_matches++;
|
||||
@ -231,6 +275,12 @@ extern int grep_main(int argc, char **argv)
|
||||
case 'c':
|
||||
print_match_counts++;
|
||||
break;
|
||||
case 'e':
|
||||
add_regex(optarg);
|
||||
break;
|
||||
case 'f':
|
||||
load_regexes_from_file(optarg);
|
||||
break;
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
case 'A':
|
||||
lines_after = strtoul(optarg, &junk, 10);
|
||||
@ -255,11 +305,18 @@ extern int grep_main(int argc, char **argv)
|
||||
}
|
||||
}
|
||||
|
||||
/* argv[optind] should be the regex pattern; no pattern, no worky */
|
||||
if (argv[optind] == NULL)
|
||||
show_usage();
|
||||
/* 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 (nregexes == 0) {
|
||||
if (argv[optind] == NULL)
|
||||
show_usage();
|
||||
else {
|
||||
add_regex(argv[optind]);
|
||||
optind++;
|
||||
}
|
||||
}
|
||||
|
||||
/* sanity check */
|
||||
/* sanity checks */
|
||||
if (print_match_counts || be_quiet || print_files_with_matches) {
|
||||
print_line_num = 0;
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
@ -268,28 +325,20 @@ extern int grep_main(int argc, char **argv)
|
||||
#endif
|
||||
}
|
||||
|
||||
/* compile the regular expression
|
||||
* we're not going to mess with sub-expressions, and we need to
|
||||
* treat newlines right. */
|
||||
reflags = REG_NOSUB;
|
||||
if (ignore_case)
|
||||
reflags |= REG_ICASE;
|
||||
xregcomp(®ex, argv[optind], reflags);
|
||||
|
||||
/* argv[(optind+1)..(argc-1)] should be names of file to grep through. If
|
||||
/* 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) - (optind+1) > 0)
|
||||
if ((argc-1) - (optind) > 0)
|
||||
print_filename++;
|
||||
|
||||
/* If no files were specified, or '-' was specified, take input from
|
||||
* stdin. Otherwise, we grep through all the files specified. */
|
||||
if (argv[optind+1] == NULL || (strcmp(argv[optind+1], "-") == 0)) {
|
||||
if (argv[optind] == NULL || (strcmp(argv[optind], "-") == 0)) {
|
||||
grep_file(stdin);
|
||||
}
|
||||
else {
|
||||
int i;
|
||||
FILE *file;
|
||||
for (i = optind + 1; i < argc; i++) {
|
||||
for (i = optind; i < argc; i++) {
|
||||
cur_file = argv[i];
|
||||
file = fopen(cur_file, "r");
|
||||
if (file == NULL) {
|
||||
@ -303,7 +352,5 @@ extern int grep_main(int argc, char **argv)
|
||||
}
|
||||
}
|
||||
|
||||
regfree(®ex);
|
||||
|
||||
return !matched; /* invert return value 0 = success, 1 = failed */
|
||||
}
|
||||
|
||||
@ -150,9 +150,10 @@ free
|
||||
# grep
|
||||
grep -l strdup ../*.c
|
||||
grep -c strdup ../*.c
|
||||
# I swear, GNU grep seems broken for this next one
|
||||
grep -lc strdup ../*.c
|
||||
grep -cv strdup ../*.c
|
||||
grep -i null ../grep.c
|
||||
grep -e strdup -e regcomp -e atexit ../grep.c
|
||||
|
||||
# gunzip
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user