mirror of
https://github.com/sheumann/hush.git
synced 2024-09-12 00:55:11 +00:00
Implemented -A, -B, and -C flags with BB_FEATURE_GREP_CONTEXT option set.
This commit is contained in:
Mark Whitley
parent
d238a7bcc8
commit
2fd52989f7
3
Config.h
3
Config.h
@ -318,6 +318,9 @@
|
||||
// Support for the find -mtine option.
|
||||
#define BB_FEATURE_FIND_MTIME
|
||||
//
|
||||
// Support for the -A -B and -C context flags in grep
|
||||
//#define BB_FEATURE_GREP_CONTEXT
|
||||
//
|
||||
// End of Features List
|
||||
//
|
||||
//
|
||||
|
||||
139
findutils/grep.c
139
findutils/grep.c
@ -28,10 +28,10 @@
|
||||
#include <errno.h>
|
||||
#include "busybox.h"
|
||||
|
||||
extern void xregcomp(regex_t *preg, const char *regex, int cflags);
|
||||
|
||||
extern int optind; /* in unistd.h */
|
||||
extern int errno; /* for use with strerror() */
|
||||
extern void xregcomp(regex_t *preg, const char *regex, int cflags); /* in busybox.h */
|
||||
|
||||
/* options */
|
||||
static int ignore_case = 0;
|
||||
@ -42,11 +42,34 @@ static int be_quiet = 0;
|
||||
static int invert_search = 0;
|
||||
static int suppress_err_msgs = 0;
|
||||
|
||||
/* globals */
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
extern char *optarg; /* in getopt.h */
|
||||
static int lines_before = 0;
|
||||
static int lines_after = 0;
|
||||
static char **before_buf = NULL;
|
||||
static int last_line_printed = 0;
|
||||
#endif /* BB_FEATURE_GREP_CONTEXT */
|
||||
|
||||
/* globals used internally */
|
||||
static regex_t regex; /* storage space for compiled regular expression */
|
||||
static int matched; /* keeps track of whether we ever matched */
|
||||
static char *cur_file = NULL; /* the current file we are reading */
|
||||
|
||||
static void print_line(const char *line, int linenum, char decoration)
|
||||
{
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
/* possibly print the little '--' seperator */
|
||||
if (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);
|
||||
puts(line);
|
||||
}
|
||||
|
||||
static void grep_file(FILE *file)
|
||||
{
|
||||
@ -54,15 +77,23 @@ static void grep_file(FILE *file)
|
||||
int ret;
|
||||
int linenum = 0;
|
||||
int nmatches = 0;
|
||||
#ifdef BB_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 /* BB_FEATURE_GREP_CONTEXT */
|
||||
|
||||
while ((line = get_line_from_file(file)) != NULL) {
|
||||
chomp(line);
|
||||
linenum++;
|
||||
ret = regexec(®ex, line, 0, NULL, 0);
|
||||
|
||||
/* test for a postitive-assertion match (regexec returned success (0)
|
||||
/*
|
||||
* test for a postitive-assertion match (regexec returns success (0)
|
||||
* and the user did not specify invert search), or a negative-assertion
|
||||
* match (vice versa) */
|
||||
* match (regexec returns failure (REG_NOMATCH) and the user specified
|
||||
* invert search)
|
||||
*/
|
||||
ret = regexec(®ex, line, 0, NULL, 0);
|
||||
if ((ret == 0 && !invert_search) || (ret == REG_NOMATCH && invert_search)) {
|
||||
|
||||
/* if we found a match but were told to be quiet, stop here and
|
||||
@ -72,17 +103,62 @@ static void grep_file(FILE *file)
|
||||
exit(0);
|
||||
}
|
||||
|
||||
/* otherwise, keep track of matches, print the matched line, and
|
||||
* whatever else the user wanted */
|
||||
/* otherwise, keep track of matches and print the matched line */
|
||||
nmatches++;
|
||||
if (!print_count_only) {
|
||||
if (print_filename)
|
||||
printf("%s:", cur_file);
|
||||
if (print_line_num)
|
||||
printf("%i:", linenum);
|
||||
puts(line);
|
||||
#ifdef BB_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 /* 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;
|
||||
}
|
||||
}
|
||||
|
||||
/* 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 */
|
||||
free(line);
|
||||
}
|
||||
|
||||
@ -93,7 +169,7 @@ static void grep_file(FILE *file)
|
||||
printf("%i\n", nmatches);
|
||||
}
|
||||
|
||||
/* record if we matched */
|
||||
/* remember if we matched */
|
||||
if (nmatches != 0)
|
||||
matched = 1;
|
||||
}
|
||||
@ -102,9 +178,16 @@ extern int grep_main(int argc, char **argv)
|
||||
{
|
||||
int opt;
|
||||
int reflags;
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
char *junk;
|
||||
#endif
|
||||
|
||||
/* do normal option parsing */
|
||||
while ((opt = getopt(argc, argv, "iHhnqvsc")) > 0) {
|
||||
while ((opt = getopt(argc, argv, "iHhnqvsc"
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
"A:B:C:"
|
||||
#endif
|
||||
)) > 0) {
|
||||
switch (opt) {
|
||||
case 'i':
|
||||
ignore_case++;
|
||||
@ -130,6 +213,25 @@ extern int grep_main(int argc, char **argv)
|
||||
case 'c':
|
||||
print_count_only++;
|
||||
break;
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
case 'A':
|
||||
lines_after = strtoul(optarg, &junk, 10);
|
||||
if(*junk != '\0')
|
||||
error_msg_and_die("invalid context length argument");
|
||||
break;
|
||||
case 'B':
|
||||
lines_before = strtoul(optarg, &junk, 10);
|
||||
if(*junk != '\0')
|
||||
error_msg_and_die("invalid context length argument");
|
||||
before_buf = (char **)calloc(lines_before, sizeof(char *));
|
||||
break;
|
||||
case 'C':
|
||||
lines_after = lines_before = strtoul(optarg, &junk, 10);
|
||||
if(*junk != '\0')
|
||||
error_msg_and_die("invalid context length argument");
|
||||
before_buf = (char **)calloc(lines_before, sizeof(char *));
|
||||
break;
|
||||
#endif /* BB_FEATURE_GREP_CONTEXT */
|
||||
}
|
||||
}
|
||||
|
||||
@ -137,6 +239,15 @@ extern int grep_main(int argc, char **argv)
|
||||
if (argv[optind] == NULL)
|
||||
usage(grep_usage);
|
||||
|
||||
/* sanity check */
|
||||
if (print_count_only || be_quiet) {
|
||||
print_line_num = 0;
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
lines_before = 0;
|
||||
lines_after = 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
/* compile the regular expression
|
||||
* we're not going to mess with sub-expressions, and we need to
|
||||
* treat newlines right. */
|
||||
|
||||
139
grep.c
139
grep.c
@ -28,10 +28,10 @@
|
||||
#include <errno.h>
|
||||
#include "busybox.h"
|
||||
|
||||
extern void xregcomp(regex_t *preg, const char *regex, int cflags);
|
||||
|
||||
extern int optind; /* in unistd.h */
|
||||
extern int errno; /* for use with strerror() */
|
||||
extern void xregcomp(regex_t *preg, const char *regex, int cflags); /* in busybox.h */
|
||||
|
||||
/* options */
|
||||
static int ignore_case = 0;
|
||||
@ -42,11 +42,34 @@ static int be_quiet = 0;
|
||||
static int invert_search = 0;
|
||||
static int suppress_err_msgs = 0;
|
||||
|
||||
/* globals */
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
extern char *optarg; /* in getopt.h */
|
||||
static int lines_before = 0;
|
||||
static int lines_after = 0;
|
||||
static char **before_buf = NULL;
|
||||
static int last_line_printed = 0;
|
||||
#endif /* BB_FEATURE_GREP_CONTEXT */
|
||||
|
||||
/* globals used internally */
|
||||
static regex_t regex; /* storage space for compiled regular expression */
|
||||
static int matched; /* keeps track of whether we ever matched */
|
||||
static char *cur_file = NULL; /* the current file we are reading */
|
||||
|
||||
static void print_line(const char *line, int linenum, char decoration)
|
||||
{
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
/* possibly print the little '--' seperator */
|
||||
if (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);
|
||||
puts(line);
|
||||
}
|
||||
|
||||
static void grep_file(FILE *file)
|
||||
{
|
||||
@ -54,15 +77,23 @@ static void grep_file(FILE *file)
|
||||
int ret;
|
||||
int linenum = 0;
|
||||
int nmatches = 0;
|
||||
#ifdef BB_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 /* BB_FEATURE_GREP_CONTEXT */
|
||||
|
||||
while ((line = get_line_from_file(file)) != NULL) {
|
||||
chomp(line);
|
||||
linenum++;
|
||||
ret = regexec(®ex, line, 0, NULL, 0);
|
||||
|
||||
/* test for a postitive-assertion match (regexec returned success (0)
|
||||
/*
|
||||
* test for a postitive-assertion match (regexec returns success (0)
|
||||
* and the user did not specify invert search), or a negative-assertion
|
||||
* match (vice versa) */
|
||||
* match (regexec returns failure (REG_NOMATCH) and the user specified
|
||||
* invert search)
|
||||
*/
|
||||
ret = regexec(®ex, line, 0, NULL, 0);
|
||||
if ((ret == 0 && !invert_search) || (ret == REG_NOMATCH && invert_search)) {
|
||||
|
||||
/* if we found a match but were told to be quiet, stop here and
|
||||
@ -72,17 +103,62 @@ static void grep_file(FILE *file)
|
||||
exit(0);
|
||||
}
|
||||
|
||||
/* otherwise, keep track of matches, print the matched line, and
|
||||
* whatever else the user wanted */
|
||||
/* otherwise, keep track of matches and print the matched line */
|
||||
nmatches++;
|
||||
if (!print_count_only) {
|
||||
if (print_filename)
|
||||
printf("%s:", cur_file);
|
||||
if (print_line_num)
|
||||
printf("%i:", linenum);
|
||||
puts(line);
|
||||
#ifdef BB_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 /* 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;
|
||||
}
|
||||
}
|
||||
|
||||
/* 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 */
|
||||
free(line);
|
||||
}
|
||||
|
||||
@ -93,7 +169,7 @@ static void grep_file(FILE *file)
|
||||
printf("%i\n", nmatches);
|
||||
}
|
||||
|
||||
/* record if we matched */
|
||||
/* remember if we matched */
|
||||
if (nmatches != 0)
|
||||
matched = 1;
|
||||
}
|
||||
@ -102,9 +178,16 @@ extern int grep_main(int argc, char **argv)
|
||||
{
|
||||
int opt;
|
||||
int reflags;
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
char *junk;
|
||||
#endif
|
||||
|
||||
/* do normal option parsing */
|
||||
while ((opt = getopt(argc, argv, "iHhnqvsc")) > 0) {
|
||||
while ((opt = getopt(argc, argv, "iHhnqvsc"
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
"A:B:C:"
|
||||
#endif
|
||||
)) > 0) {
|
||||
switch (opt) {
|
||||
case 'i':
|
||||
ignore_case++;
|
||||
@ -130,6 +213,25 @@ extern int grep_main(int argc, char **argv)
|
||||
case 'c':
|
||||
print_count_only++;
|
||||
break;
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
case 'A':
|
||||
lines_after = strtoul(optarg, &junk, 10);
|
||||
if(*junk != '\0')
|
||||
error_msg_and_die("invalid context length argument");
|
||||
break;
|
||||
case 'B':
|
||||
lines_before = strtoul(optarg, &junk, 10);
|
||||
if(*junk != '\0')
|
||||
error_msg_and_die("invalid context length argument");
|
||||
before_buf = (char **)calloc(lines_before, sizeof(char *));
|
||||
break;
|
||||
case 'C':
|
||||
lines_after = lines_before = strtoul(optarg, &junk, 10);
|
||||
if(*junk != '\0')
|
||||
error_msg_and_die("invalid context length argument");
|
||||
before_buf = (char **)calloc(lines_before, sizeof(char *));
|
||||
break;
|
||||
#endif /* BB_FEATURE_GREP_CONTEXT */
|
||||
}
|
||||
}
|
||||
|
||||
@ -137,6 +239,15 @@ extern int grep_main(int argc, char **argv)
|
||||
if (argv[optind] == NULL)
|
||||
usage(grep_usage);
|
||||
|
||||
/* sanity check */
|
||||
if (print_count_only || be_quiet) {
|
||||
print_line_num = 0;
|
||||
#ifdef BB_FEATURE_GREP_CONTEXT
|
||||
lines_before = 0;
|
||||
lines_after = 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
/* compile the regular expression
|
||||
* we're not going to mess with sub-expressions, and we need to
|
||||
* treat newlines right. */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user