* (C) 2006 Jac Goudsmit added -o option
*/
-//applet:IF_GREP(APPLET(grep, _BB_DIR_BIN, _BB_SUID_DROP))
-//applet:IF_FEATURE_GREP_EGREP_ALIAS(APPLET_ODDNAME(egrep, grep, _BB_DIR_BIN, _BB_SUID_DROP, egrep))
-//applet:IF_FEATURE_GREP_FGREP_ALIAS(APPLET_ODDNAME(fgrep, grep, _BB_DIR_BIN, _BB_SUID_DROP, fgrep))
+//applet:IF_GREP(APPLET(grep, BB_DIR_BIN, BB_SUID_DROP))
+//applet:IF_FEATURE_GREP_EGREP_ALIAS(APPLET_ODDNAME(egrep, grep, BB_DIR_BIN, BB_SUID_DROP, egrep))
+//applet:IF_FEATURE_GREP_FGREP_ALIAS(APPLET_ODDNAME(fgrep, grep, BB_DIR_BIN, BB_SUID_DROP, fgrep))
//kbuild:lib-$(CONFIG_GREP) += grep.o
//config: Print the specified number of context lines (-C).
#include "libbb.h"
+#include "common_bufsiz.h"
#include "xregex.h"
//usage: "PATTERN/-e PATTERN.../-f FILE [FILE]..."
//usage:#define grep_full_usage "\n\n"
//usage: "Search for PATTERN in FILEs (or stdin)\n"
-//usage: "\nOptions:"
//usage: "\n -H Add 'filename:' prefix"
//usage: "\n -h Do not add 'filename:' prefix"
//usage: "\n -n Add 'line_no:' prefix"
//usage: "\n -r Recurse"
//usage: "\n -i Ignore case"
//usage: "\n -w Match whole words only"
+//usage: "\n -x Match whole lines only"
//usage: "\n -F PATTERN is a literal (not regexp)"
//usage: IF_FEATURE_GREP_EGREP_ALIAS(
//usage: "\n -E PATTERN is an extended regexp"
//usage:#define fgrep_full_usage ""
#define OPTSTR_GREP \
- "lnqvscFiHhe:f:Lorm:w" \
+ "lnqvscFiHhe:f:Lorm:wx" \
IF_FEATURE_GREP_CONTEXT("A:B:C:") \
IF_FEATURE_GREP_EGREP_ALIAS("E") \
IF_EXTRA_COMPAT("z") \
OPTBIT_r, /* recurse dirs */
OPTBIT_m, /* -m MAX_MATCHES */
OPTBIT_w, /* -w whole word match */
+ OPTBIT_x, /* -x whole line match */
IF_FEATURE_GREP_CONTEXT( OPTBIT_A ,) /* -A NUM: after-match context */
IF_FEATURE_GREP_CONTEXT( OPTBIT_B ,) /* -B NUM: before-match context */
IF_FEATURE_GREP_CONTEXT( OPTBIT_C ,) /* -C NUM: -A and -B combined */
OPT_r = 1 << OPTBIT_r,
OPT_m = 1 << OPTBIT_m,
OPT_w = 1 << OPTBIT_w,
+ OPT_x = 1 << OPTBIT_x,
OPT_A = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_A)) + 0,
OPT_B = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_B)) + 0,
OPT_C = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_C)) + 0,
llist_t *pattern_head; /* growable list of patterns to match */
const char *cur_file; /* the current file we are reading */
} FIX_ALIASING;
-#define G (*(struct globals*)&bb_common_bufsiz1)
+#define G (*(struct globals*)bb_common_bufsiz1)
#define INIT_G() do { \
- struct G_sizecheck { \
- char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
- }; \
+ setup_common_bufsiz(); \
+ BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
} while (0)
#define max_matches (G.max_matches )
#if !ENABLE_EXTRA_COMPAT
while (pattern_ptr) {
gl = (grep_list_data_t *)pattern_ptr->data;
if (FGREP_FLAG) {
- found |= (((option_mask32 & OPT_i)
- ? strcasestr(line, gl->pattern)
- : strstr(line, gl->pattern)
- ) != NULL);
+ char *match;
+ char *str = line;
+ opt_f_again:
+ match = ((option_mask32 & OPT_i)
+ ? strcasestr(str, gl->pattern)
+ : strstr(str, gl->pattern)
+ );
+ if (match) {
+ if (option_mask32 & OPT_x) {
+ if (match != str)
+ goto opt_f_not_found;
+ if (str[strlen(gl->pattern)] != '\0')
+ goto opt_f_not_found;
+ } else
+ if (option_mask32 & OPT_w) {
+ char c = (match != str) ? match[-1] : ' ';
+ if (!isalnum(c) && c != '_') {
+ c = match[strlen(gl->pattern)];
+ if (!c || (!isalnum(c) && c != '_'))
+ goto opt_f_found;
+ }
+ str = match + 1;
+ goto opt_f_again;
+ }
+ opt_f_found:
+ found = 1;
+ opt_f_not_found: ;
+ }
} else {
+#if ENABLE_EXTRA_COMPAT
+ unsigned start_pos;
+#else
+ int match_flg;
+#endif
+ char *match_at;
+
if (!(gl->flg_mem_alocated_compiled & COMPILED)) {
gl->flg_mem_alocated_compiled |= COMPILED;
#if !ENABLE_EXTRA_COMPAT
#if !ENABLE_EXTRA_COMPAT
gl->matched_range.rm_so = 0;
gl->matched_range.rm_eo = 0;
+ match_flg = 0;
+#else
+ start_pos = 0;
#endif
+ match_at = line;
+ opt_w_again:
+//bb_error_msg("'%s' start_pos:%d line_len:%d", match_at, start_pos, line_len);
if (
#if !ENABLE_EXTRA_COMPAT
- regexec(&gl->compiled_regex, line, 1, &gl->matched_range, 0) == 0
+ regexec(&gl->compiled_regex, match_at, 1, &gl->matched_range, match_flg) == 0
#else
- re_search(&gl->compiled_regex, line, line_len,
- /*start:*/ 0, /*range:*/ line_len,
+ re_search(&gl->compiled_regex, match_at, line_len,
+ start_pos, /*range:*/ line_len,
&gl->matched_range) >= 0
#endif
) {
- if (!(option_mask32 & OPT_w))
+ if (option_mask32 & OPT_x) {
+ found = (gl->matched_range.rm_so == 0
+ && match_at[gl->matched_range.rm_eo] == '\0');
+ } else
+ if (!(option_mask32 & OPT_w)) {
found = 1;
- else {
+ } else {
char c = ' ';
- if (gl->matched_range.rm_so)
- c = line[gl->matched_range.rm_so - 1];
+ if (match_at > line || gl->matched_range.rm_so != 0) {
+ c = match_at[gl->matched_range.rm_so - 1];
+ }
if (!isalnum(c) && c != '_') {
- c = line[gl->matched_range.rm_eo];
- if (!c || (!isalnum(c) && c != '_'))
- found = 1;
+ c = match_at[gl->matched_range.rm_eo];
+ }
+ if (!isalnum(c) && c != '_') {
+ found = 1;
+ } else {
+ /*
+ * Why check gl->matched_range.rm_eo?
+ * Zero-length match makes -w skip the line:
+ * "echo foo | grep ^" prints "foo",
+ * "echo foo | grep -w ^" prints nothing.
+ * Without such check, we can loop forever.
+ */
+#if !ENABLE_EXTRA_COMPAT
+ if (gl->matched_range.rm_eo != 0) {
+ match_at += gl->matched_range.rm_eo;
+ match_flg |= REG_NOTBOL;
+ goto opt_w_again;
+ }
+#else
+ if (gl->matched_range.rm_eo > start_pos) {
+ start_pos = gl->matched_range.rm_eo;
+ goto opt_w_again;
+ }
+#endif
}
}
}
static void load_regexes_from_file(llist_t *fopt)
{
- char *line;
- FILE *f;
-
while (fopt) {
+ char *line;
+ FILE *fp;
llist_t *cur = fopt;
char *ffile = cur->data;
fopt = cur->link;
free(cur);
- f = xfopen_stdin(ffile);
- while ((line = xmalloc_fgetline(f)) != NULL) {
+ fp = xfopen_stdin(ffile);
+ while ((line = xmalloc_fgetline(fp)) != NULL) {
llist_add_to(&pattern_head,
new_grep_list_data(line, ALLOCATED));
}
+ fclose_if_not_stdin(fp);
}
}
int matched = 0;
recursive_action(dir,
/* recurse=yes */ ACTION_RECURSE |
- /* followLinks=no */
+ /* followLinks=command line only */ ACTION_FOLLOWLINKS_L0 |
/* depthFirst=yes */ ACTION_DEPTHFIRST,
/* fileAction= */ file_action_grep,
/* dirAction= */ NULL,
FILE *file;
int matched;
llist_t *fopt = NULL;
-
- /* do normal option parsing */
#if ENABLE_FEATURE_GREP_CONTEXT
int Copt, opts;
+#endif
+
+ /* For grep, exitcode of 1 is "not found". Other errors are 2: */
+ xfunc_error_retval = 2;
+ /* do normal option parsing */
+#if ENABLE_FEATURE_GREP_CONTEXT
/* -H unsets -h; -C unsets -A,-B; -e,-f are lists;
* -m,-A,-B,-C have numeric param */
opt_complementary = "H-h:C-AB:e::f::m+:A+:B+:C+";
if (opts & OPT_C) {
/* -C unsets prev -A and -B, but following -A or -B
- may override it */
+ * may override it */
if (!(opts & OPT_A)) /* not overridden */
lines_after = Copt;
if (!(opts & OPT_B)) /* not overridden */
#endif
invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
- if (pattern_head != NULL) {
- /* convert char **argv to grep_list_data_t */
+ { /* 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)
+ if (option_mask32 & OPT_f) {
load_regexes_from_file(fopt);
+ if (!pattern_head) { /* -f EMPTY_FILE? */
+ /* GNU grep treats it as "nothing matches" */
+ llist_add_to(&pattern_head, new_grep_list_data((char*) "", 0));
+ invert_search ^= 1;
+ }
+ }
if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')
option_mask32 |= OPT_F;
#if !ENABLE_EXTRA_COMPAT
- if (!(option_mask32 & (OPT_o | OPT_w)))
+ if (!(option_mask32 & (OPT_o | OPT_w | OPT_x)))
reflags = REG_NOSUB;
#endif
projects / oweals / busybox.git / blobdiff