*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
-/* BB_AUDIT SUSv3 defects - unsupported option -x. */
+/* BB_AUDIT SUSv3 defects - unsupported option -x "match whole line only". */
/* BB_AUDIT GNU defects - always acts as -a. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/grep.html */
/*
/* options */
#define OPTSTR_GREP \
"lnqvscFiHhe:f:Lorm:" \
- USE_FEATURE_GREP_CONTEXT("A:B:C:") \
- USE_FEATURE_GREP_EGREP_ALIAS("E") \
- USE_DESKTOP("w") \
+ IF_FEATURE_GREP_CONTEXT("A:B:C:") \
+ IF_FEATURE_GREP_EGREP_ALIAS("E") \
+ IF_DESKTOP("w") \
+ IF_EXTRA_COMPAT("z") \
"aI"
+
/* ignored: -a "assume all files to be text" */
/* ignored: -I "assume binary files have no matches" */
enum {
OPTBIT_l, /* list matched file names only */
OPTBIT_n, /* print line# */
- OPTBIT_q, /* quiet - exit(0) of first match */
+ OPTBIT_q, /* quiet - exit(EXIT_SUCCESS) of first match */
OPTBIT_v, /* invert the match, to select non-matching lines */
OPTBIT_s, /* suppress errors about file open errors */
OPTBIT_c, /* count matches per file (suppresses normal output) */
OPTBIT_o, /* show only matching parts of lines */
OPTBIT_r, /* recurse dirs */
OPTBIT_m, /* -m MAX_MATCHES */
- USE_FEATURE_GREP_CONTEXT( OPTBIT_A ,) /* -A NUM: after-match context */
- USE_FEATURE_GREP_CONTEXT( OPTBIT_B ,) /* -B NUM: before-match context */
- USE_FEATURE_GREP_CONTEXT( OPTBIT_C ,) /* -C NUM: -A and -B combined */
- USE_FEATURE_GREP_EGREP_ALIAS(OPTBIT_E ,) /* extended regexp */
- USE_DESKTOP( OPTBIT_w ,) /* whole word 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 */
+ IF_FEATURE_GREP_EGREP_ALIAS(OPTBIT_E ,) /* extended regexp */
+ IF_DESKTOP( OPTBIT_w ,) /* whole word match */
+ IF_EXTRA_COMPAT( OPTBIT_z ,) /* input is NUL terminated */
OPT_l = 1 << OPTBIT_l,
OPT_n = 1 << OPTBIT_n,
OPT_q = 1 << OPTBIT_q,
OPT_o = 1 << OPTBIT_o,
OPT_r = 1 << OPTBIT_r,
OPT_m = 1 << OPTBIT_m,
- 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_EGREP_ALIAS((1 << OPTBIT_E)) + 0,
- OPT_w = USE_DESKTOP( (1 << OPTBIT_w)) + 0,
+ 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,
+ OPT_E = IF_FEATURE_GREP_EGREP_ALIAS((1 << OPTBIT_E)) + 0,
+ OPT_w = IF_DESKTOP( (1 << OPTBIT_w)) + 0,
+ OPT_z = IF_EXTRA_COMPAT( (1 << OPTBIT_z)) + 0,
};
#define PRINT_FILES_WITH_MATCHES (option_mask32 & OPT_l)
#define PRINT_MATCH_COUNTS (option_mask32 & OPT_c)
#define FGREP_FLAG (option_mask32 & OPT_F)
#define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & OPT_L)
+#define NUL_DELIMITED (option_mask32 & OPT_z)
struct globals {
int max_matches;
+#if !ENABLE_EXTRA_COMPAT
int reflags;
+#else
+ RE_TRANSLATE_TYPE case_fold; /* RE_TRANSLATE_TYPE is [[un]signed] char* */
+#endif
smalluint invert_search;
smalluint print_filename;
smalluint open_errors;
int lines_before;
int lines_after;
char **before_buf;
+ IF_EXTRA_COMPAT(size_t *before_buf_size;)
int last_line_printed;
#endif
/* globals used internally */
const char *cur_file; /* the current file we are reading */
};
#define G (*(struct globals*)&bb_common_bufsiz1)
-#define INIT_G() \
- do { \
- struct G_sizecheck { \
- char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
- }; \
- } while (0)
+#define INIT_G() do { \
+ struct G_sizecheck { \
+ char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
+ }; \
+} while (0)
#define max_matches (G.max_matches )
-#define reflags (G.reflags )
+#if !ENABLE_EXTRA_COMPAT
+# define reflags (G.reflags )
+#else
+# define case_fold (G.case_fold )
+/* http://www.delorie.com/gnu/docs/regex/regex_46.html */
+# define reflags re_syntax_options
+# undef REG_NOSUB
+# undef REG_EXTENDED
+# undef REG_ICASE
+# define REG_NOSUB bug:is:here /* should not be used */
+/* Just RE_SYNTAX_EGREP is not enough, need to enable {n[,[m]]} too */
+# define REG_EXTENDED (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES)
+# define REG_ICASE bug:is:here /* should not be used */
+#endif
#define invert_search (G.invert_search )
#define print_filename (G.print_filename )
#define open_errors (G.open_errors )
#define lines_before (G.lines_before )
#define lines_after (G.lines_after )
#define before_buf (G.before_buf )
+#define before_buf_size (G.before_buf_size )
#define last_line_printed (G.last_line_printed )
#define pattern_head (G.pattern_head )
#define cur_file (G.cur_file )
typedef struct grep_list_data_t {
char *pattern;
- regex_t preg;
-#define PATTERN_MEM_A 1
+/* for GNU regex, matched_range must be persistent across grep_file() calls */
+#if !ENABLE_EXTRA_COMPAT
+ regex_t compiled_regex;
+ regmatch_t matched_range;
+#else
+ struct re_pattern_buffer compiled_regex;
+ struct re_registers matched_range;
+#endif
+#define ALLOCATED 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_EXTRA_COMPAT
+#define print_line(line, line_len, linenum, decoration) \
+ print_line(line, linenum, decoration)
+#endif
+static void print_line(const char *line, size_t line_len, int linenum, char decoration)
{
#if ENABLE_FEATURE_GREP_CONTEXT
/* Happens when we go to next file, immediately hit match
if (linenum < 1)
return;
/* possibly print the little '--' separator */
- if ((lines_before || lines_after) && did_print_line &&
- last_line_printed != linenum - 1) {
+ if ((lines_before || lines_after) && did_print_line
+ && last_line_printed != linenum - 1
+ ) {
puts("--");
}
/* guard against printing "--" before first line of first file */
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))
+ if ((option_mask32 & (OPT_v|OPT_o)) != (OPT_v|OPT_o)) {
+#if !ENABLE_EXTRA_COMPAT
puts(line);
+#else
+ fwrite(line, 1, line_len, stdout);
+ putchar(NUL_DELIMITED ? '\0' : '\n');
+#endif
+ }
}
-static int grep_file(FILE *file)
+#if ENABLE_EXTRA_COMPAT
+/* Unlike getline, this one removes trailing '\n' */
+static ssize_t FAST_FUNC bb_getline(char **line_ptr, size_t *line_alloc_len, FILE *file)
{
+ ssize_t res_sz;
char *line;
+ int delim = (NUL_DELIMITED ? '\0' : '\n');
+
+ res_sz = getdelim(line_ptr, line_alloc_len, delim, file);
+ line = *line_ptr;
+
+ if (res_sz > 0) {
+ if (line[res_sz - 1] == delim)
+ line[--res_sz] = '\0';
+ } else {
+ free(line); /* uclibc allocates a buffer even on EOF. WTF? */
+ }
+ return res_sz;
+}
+#endif
+
+static int grep_file(FILE *file)
+{
smalluint found;
int linenum = 0;
int nmatches = 0;
- regmatch_t regmatch;
+#if !ENABLE_EXTRA_COMPAT
+ char *line;
+#else
+ char *line = NULL;
+ ssize_t line_len;
+ size_t line_alloc_len;
+#define rm_so start[0]
+#define rm_eo end[0]
+#endif
#if ENABLE_FEATURE_GREP_CONTEXT
int print_n_lines_after = 0;
int curpos = 0; /* track where we are in the circular 'before' buffer */
enum { print_n_lines_after = 0 };
#endif /* ENABLE_FEATURE_GREP_CONTEXT */
- while ((line = xmalloc_getline(file)) != NULL) {
+ while (
+#if !ENABLE_EXTRA_COMPAT
+ (line = xmalloc_fgetline(file)) != NULL
+#else
+ (line_len = bb_getline(&line, &line_alloc_len, file)) >= 0
+#endif
+ ) {
llist_t *pattern_ptr = pattern_head;
- grep_list_data_t *gl;
+ grep_list_data_t *gl = gl; /* for gcc */
linenum++;
found = 0;
} else {
if (!(gl->flg_mem_alocated_compiled & COMPILED)) {
gl->flg_mem_alocated_compiled |= COMPILED;
- xregcomp(&(gl->preg), gl->pattern, reflags);
+#if !ENABLE_EXTRA_COMPAT
+ xregcomp(&gl->compiled_regex, gl->pattern, reflags);
+#else
+ memset(&gl->compiled_regex, 0, sizeof(gl->compiled_regex));
+ gl->compiled_regex.translate = case_fold; /* for -i */
+ if (re_compile_pattern(gl->pattern, strlen(gl->pattern), &gl->compiled_regex))
+ bb_error_msg_and_die("bad regex '%s'", gl->pattern);
+#endif
}
- regmatch.rm_so = 0;
- regmatch.rm_eo = 0;
- if (regexec(&(gl->preg), line, 1, ®match, 0) == 0) {
+#if !ENABLE_EXTRA_COMPAT
+ gl->matched_range.rm_so = 0;
+ gl->matched_range.rm_eo = 0;
+#endif
+ if (
+#if !ENABLE_EXTRA_COMPAT
+ regexec(&gl->compiled_regex, line, 1, &gl->matched_range, 0) == 0
+#else
+ re_search(&gl->compiled_regex, line, line_len,
+ /*start:*/ 0, /*range:*/ line_len,
+ &gl->matched_range) >= 0
+#endif
+ ) {
if (!(option_mask32 & OPT_w))
found = 1;
else {
char c = ' ';
- if (regmatch.rm_so)
- c = line[regmatch.rm_so - 1];
+ if (gl->matched_range.rm_so)
+ c = line[gl->matched_range.rm_so - 1];
if (!isalnum(c) && c != '_') {
- c = line[regmatch.rm_eo];
+ c = line[gl->matched_range.rm_eo];
if (!c || (!isalnum(c) && c != '_'))
found = 1;
}
* "exit immediately with zero status
* if any match is found,
* even if errors were detected" */
- exit(0);
+ exit(EXIT_SUCCESS);
}
/* if we're just printing filenames, we stop after the first match */
if (PRINT_FILES_WITH_MATCHES) {
puts(cur_file);
- /* fall thru to "return 1" */
+ /* fall through to "return 1" */
}
/* OPT_L aka PRINT_FILES_WITHOUT_MATCHES: return early */
return 1; /* one match */
/* 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, '-');
+ print_line(before_buf[idx], before_buf_size[idx], first_buf_entry_line_num, '-');
free(before_buf[idx]);
before_buf[idx] = NULL;
idx = (idx + 1) % lines_before;
print_n_lines_after = lines_after;
#endif
if (option_mask32 & OPT_o) {
- line[regmatch.rm_eo] = '\0';
- print_line(line + regmatch.rm_so, linenum, ':');
+ if (FGREP_FLAG) {
+ /* -Fo just prints the pattern
+ * (unless -v: -Fov doesnt print anything at all) */
+ if (found)
+ print_line(gl->pattern, strlen(gl->pattern), linenum, ':');
+ } else while (1) {
+ unsigned end = gl->matched_range.rm_eo;
+ char old = line[end];
+ line[end] = '\0';
+ print_line(line + gl->matched_range.rm_so,
+ end - gl->matched_range.rm_so,
+ linenum, ':');
+ line[end] = old;
+#if !ENABLE_EXTRA_COMPAT
+ if (regexec(&gl->compiled_regex, line + end,
+ 1, &gl->matched_range, REG_NOTBOL) != 0)
+ break;
+ gl->matched_range.rm_so += end;
+ gl->matched_range.rm_eo += end;
+#else
+ if (re_search(&gl->compiled_regex, line, line_len,
+ end, line_len - end,
+ &gl->matched_range) < 0)
+ break;
+#endif
+ }
} else {
- print_line(line, linenum, ':');
+ print_line(line, line_len, linenum, ':');
}
}
}
else { /* no match */
/* if we need to print some context lines after the last match, do so */
if (print_n_lines_after) {
- print_line(line, linenum, '-');
+ print_line(line, strlen(line), linenum, '-');
print_n_lines_after--;
} else if (lines_before) {
/* Add the line to the circular 'before' buffer */
free(before_buf[curpos]);
before_buf[curpos] = line;
+ IF_EXTRA_COMPAT(before_buf_size[curpos] = line_len;)
curpos = (curpos + 1) % lines_before;
- /* avoid free(line) - we took line */
+ /* avoid free(line) - we took the line */
line = NULL;
}
}
#endif /* ENABLE_FEATURE_GREP_CONTEXT */
+#if !ENABLE_EXTRA_COMPAT
free(line);
-
+#endif
/* Did we print all context after last requested match? */
if ((option_mask32 & OPT_m)
- && !print_n_lines_after && nmatches == max_matches)
+ && !print_n_lines_after
+ && nmatches == max_matches
+ ) {
break;
- }
+ }
+ } /* while (read line) */
/* special-case file post-processing for options where we don't print line
* matches, just filenames and possibly match counts */
fopt = cur->link;
free(cur);
- f = xfopen(ffile, "r");
- while ((line = xmalloc_getline(f)) != NULL) {
+ f = xfopen_stdin(ffile);
+ while ((line = xmalloc_fgetline(f)) != NULL) {
llist_add_to(&pattern_head,
- new_grep_list_data(line, PATTERN_MEM_A));
+ new_grep_list_data(line, ALLOCATED));
}
}
}
-static int file_action_grep(const char *filename, struct stat *statbuf, void* matched, int depth)
+static int FAST_FUNC file_action_grep(const char *filename,
+ struct stat *statbuf UNUSED_PARAM,
+ void* matched,
+ int depth UNUSED_PARAM)
{
- FILE *file = fopen(filename, "r");
+ FILE *file = fopen_for_read(filename);
if (file == NULL) {
if (!SUPPRESS_ERR_MSGS)
- bb_simple_perror_msg(cur_file);
+ bb_simple_perror_msg(filename);
open_errors = 1;
return 0;
}
return matched;
}
-int grep_main(int argc, char **argv);
+int grep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int grep_main(int argc, char **argv)
{
FILE *file;
int matched;
- char *mopt;
llist_t *fopt = NULL;
/* do normal option parsing */
#if ENABLE_FEATURE_GREP_CONTEXT
- char *slines_after;
- char *slines_before;
- char *Copt;
+ int Copt;
- opt_complementary = "H-h:e::f::C-AB";
+ /* -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+";
getopt32(argv,
OPTSTR_GREP,
- &pattern_head, &fopt, &mopt,
- &slines_after, &slines_before, &Copt);
+ &pattern_head, &fopt, &max_matches,
+ &lines_after, &lines_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;
+ lines_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);
+ lines_before = Copt;
}
/* 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 if (lines_before > 0) {
+ before_buf = xzalloc(lines_before * sizeof(before_buf[0]));
+ IF_EXTRA_COMPAT(before_buf_size = xzalloc(lines_before * sizeof(before_buf_size[0]));)
+ }
#else
/* with auto sanity checks */
- opt_complementary = "H-h:e::f::c-n:q-n:l-n";
+ /* -H unsets -h; -c,-q or -l unset -n; -e,-f are lists; -m N */
+ opt_complementary = "H-h:c-n:q-n:l-n:e::f::m+";
getopt32(argv, OPTSTR_GREP,
- &pattern_head, &fopt, &mopt);
+ &pattern_head, &fopt, &max_matches);
#endif
- if (option_mask32 & OPT_m) {
- max_matches = xatoi_u(mopt);
- }
invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
if (pattern_head != NULL) {
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)))
reflags = REG_NOSUB;
+#endif
if (ENABLE_FEATURE_GREP_EGREP_ALIAS
&& (applet_name[0] == 'e' || (option_mask32 & OPT_E))
) {
reflags |= REG_EXTENDED;
}
+#if ENABLE_EXTRA_COMPAT
+ else {
+ reflags = RE_SYNTAX_GREP;
+ }
+#endif
- if (option_mask32 & OPT_i)
+ if (option_mask32 & OPT_i) {
+#if !ENABLE_EXTRA_COMPAT
reflags |= REG_ICASE;
+#else
+ int i;
+ case_fold = xmalloc(256);
+ for (i = 0; i < 256; i++)
+ case_fold[i] = (unsigned char)i;
+ for (i = 'a'; i <= 'z'; i++)
+ case_fold[i] = (unsigned char)(i - ('a' - 'A'));
+#endif
+ }
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 we didn't get a pattern from -e and no command file was specified,
+ * first parameter should be the pattern. no pattern, no worky */
if (pattern_head == NULL) {
char *pattern;
if (*argv == NULL)
argc--;
}
- /* argv[(optind)..(argc-1)] should be names of file to grep through. If
+ /* argv[0..(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;
do {
cur_file = *argv++;
file = stdin;
- if (!cur_file || (*cur_file == '-' && !cur_file[1])) {
+ if (!cur_file || LONE_DASH(cur_file)) {
cur_file = "(standard input)";
} else {
if (option_mask32 & OPT_r) {
}
}
/* else: fopen(dir) will succeed, but reading won't */
- file = fopen(cur_file, "r");
+ file = fopen_for_read(cur_file);
if (file == NULL) {
if (!SUPPRESS_ERR_MSGS)
bb_simple_perror_msg(cur_file);
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))
+ if (gl->flg_mem_alocated_compiled & ALLOCATED)
free(gl->pattern);
- if ((gl->flg_mem_alocated_compiled & COMPILED))
- regfree(&(gl->preg));
+ if (gl->flg_mem_alocated_compiled & COMPILED)
+ regfree(&gl->compiled_regex);
free(gl);
free(pattern_head_ptr);
}
projects / oweals / busybox.git / blobdiff