grep: implement -w
This commit is contained in:
Denis Vlasenko
parent
4222ae440a
commit
385304d449
168
findutils/grep.c
168
findutils/grep.c
@ -22,49 +22,63 @@
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#include "busybox.h"
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#include "xregex.h"
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/* options */
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#define GREP_OPTS "lnqvscFiHhe:f:Lor"
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#define GREP_OPT_l (1<<0)
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#define PRINT_FILES_WITH_MATCHES (option_mask32 & GREP_OPT_l)
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#define GREP_OPT_n (1<<1)
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#define PRINT_LINE_NUM (option_mask32 & GREP_OPT_n)
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#define GREP_OPT_q (1<<2)
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#define BE_QUIET (option_mask32 & GREP_OPT_q)
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#define GREP_OPT_v (1<<3)
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#define GREP_OPT_s (1<<4)
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#define SUPPRESS_ERR_MSGS (option_mask32 & GREP_OPT_s)
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#define GREP_OPT_c (1<<5)
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#define PRINT_MATCH_COUNTS (option_mask32 & GREP_OPT_c)
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#define GREP_OPT_F (1<<6)
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#define FGREP_FLAG (option_mask32 & GREP_OPT_F)
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#define GREP_OPT_i (1<<7)
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#define GREP_OPT_H (1<<8)
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#define GREP_OPT_h (1<<9)
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#define GREP_OPT_e (1<<10)
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#define GREP_OPT_f (1<<11)
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#define GREP_OPT_L (1<<12)
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#define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & GREP_OPT_L)
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#define GREP_OPT_o (1<<13)
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#define GREP_OPT_r (1<<14)
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#if ENABLE_FEATURE_GREP_CONTEXT
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# define GREP_OPT_CONTEXT "A:B:C:"
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# define GREP_OPT_A (1<<15)
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# define GREP_OPT_B (1<<16)
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# define GREP_OPT_C (1<<17)
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# define GREP_OPT_E (1<<18)
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#else
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# define GREP_OPT_CONTEXT ""
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# define GREP_OPT_A 0
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# define GREP_OPT_B 0
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# define GREP_OPT_C 0
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# define GREP_OPT_E (1<<15)
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#endif
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#if ENABLE_FEATURE_GREP_EGREP_ALIAS
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# define OPT_EGREP "E"
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#else
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# define OPT_EGREP ""
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#endif
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#define OPTSTR_GREP \
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"lnqvscFiHhe:f:Lor" \
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USE_FEATURE_GREP_CONTEXT("A:B:C:") \
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USE_FEATURE_GREP_EGREP_ALIAS("E") \
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USE_DESKTOP("w") \
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enum {
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OPTBIT_l,
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OPTBIT_n,
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OPTBIT_q,
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OPTBIT_v,
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OPTBIT_s,
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OPTBIT_c,
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OPTBIT_F,
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OPTBIT_i,
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OPTBIT_H,
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OPTBIT_h,
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OPTBIT_e,
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OPTBIT_f,
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OPTBIT_L,
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OPTBIT_o,
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OPTBIT_r,
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USE_FEATURE_GREP_CONTEXT(OPTBIT_A ,)
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USE_FEATURE_GREP_CONTEXT(OPTBIT_B ,)
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USE_FEATURE_GREP_CONTEXT(OPTBIT_C ,)
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USE_FEATURE_GREP_CONTEXT(OPTBIT_E ,)
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USE_DESKTOP( OPTBIT_w ,)
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OPT_l = 1 << OPTBIT_l,
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OPT_n = 1 << OPTBIT_n,
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OPT_q = 1 << OPTBIT_q,
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OPT_v = 1 << OPTBIT_v,
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OPT_s = 1 << OPTBIT_s,
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OPT_c = 1 << OPTBIT_c,
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OPT_F = 1 << OPTBIT_F,
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OPT_i = 1 << OPTBIT_i,
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OPT_H = 1 << OPTBIT_H,
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OPT_h = 1 << OPTBIT_h,
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OPT_e = 1 << OPTBIT_e,
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OPT_f = 1 << OPTBIT_f,
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OPT_L = 1 << OPTBIT_L,
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OPT_o = 1 << OPTBIT_o,
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OPT_r = 1 << OPTBIT_r,
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OPT_A = USE_FEATURE_GREP_CONTEXT((1 << OPTBIT_A)) + 0,
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OPT_B = USE_FEATURE_GREP_CONTEXT((1 << OPTBIT_B)) + 0,
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OPT_C = USE_FEATURE_GREP_CONTEXT((1 << OPTBIT_C)) + 0,
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OPT_E = USE_FEATURE_GREP_CONTEXT((1 << OPTBIT_E)) + 0,
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OPT_w = USE_DESKTOP( (1 << OPTBIT_w)) + 0,
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};
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#define PRINT_FILES_WITH_MATCHES (option_mask32 & OPT_l)
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#define PRINT_LINE_NUM (option_mask32 & OPT_n)
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#define BE_QUIET (option_mask32 & OPT_q)
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#define SUPPRESS_ERR_MSGS (option_mask32 & OPT_s)
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#define PRINT_MATCH_COUNTS (option_mask32 & OPT_c)
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#define FGREP_FLAG (option_mask32 & OPT_F)
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#define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & OPT_L)
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typedef unsigned char byte_t;
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@ -107,11 +121,10 @@ static void print_line(const char *line, int linenum, char decoration)
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if (PRINT_LINE_NUM)
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printf("%i%c", linenum, decoration);
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/* Emulate weird GNU grep behavior with -ov */
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if ((option_mask32 & (GREP_OPT_v+GREP_OPT_o)) != (GREP_OPT_v+GREP_OPT_o))
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if ((option_mask32 & (OPT_v+OPT_o)) != (OPT_v+OPT_o))
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puts(line);
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}
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static int grep_file(FILE *file)
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{
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char *line;
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@ -148,13 +161,25 @@ static int grep_file(FILE *file)
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}
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regmatch.rm_so = 0;
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regmatch.rm_eo = 0;
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ret |= regexec(&(gl->preg), line, 1, ®match, 0) == 0;
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if (regexec(&(gl->preg), line, 1, ®match, 0) == 0) {
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if (!(option_mask32 & OPT_w))
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ret = 1;
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else {
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char c = ' ';
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if (regmatch.rm_so)
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c = line[regmatch.rm_so - 1];
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if (!isalnum(c) && c != '_') {
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c = line[regmatch.rm_eo];
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if (!c || (!isalnum(c) && c != '_'))
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ret = 1;
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}
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}
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}
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}
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pattern_ptr = pattern_ptr->link;
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} /* while (pattern_ptr) */
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if (ret ^ invert_search) {
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if (PRINT_FILES_WITH_MATCHES || BE_QUIET)
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free(line);
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@ -201,7 +226,7 @@ static int grep_file(FILE *file)
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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
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if (option_mask32 & GREP_OPT_o) {
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if (option_mask32 & OPT_o) {
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line[regmatch.rm_eo] = '\0';
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print_line(line + regmatch.rm_so, linenum, ':');
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} else {
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@ -289,7 +314,6 @@ static void load_regexes_from_file(llist_t *fopt)
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}
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}
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static int file_action_grep(const char *filename, struct stat *statbuf, void* matched, int depth)
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{
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FILE *file = fopen(filename, "r");
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@ -305,7 +329,6 @@ static int file_action_grep(const char *filename, struct stat *statbuf, void* ma
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return 1;
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}
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static int grep_dir(const char *dir)
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{
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int matched = 0;
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@ -320,7 +343,6 @@ static int grep_dir(const char *dir)
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return matched;
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}
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int grep_main(int argc, char **argv);
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int grep_main(int argc, char **argv)
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{
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@ -336,28 +358,28 @@ int grep_main(int argc, char **argv)
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opt_complementary = "H-h:e::f::C-AB";
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getopt32(argc, argv,
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GREP_OPTS GREP_OPT_CONTEXT OPT_EGREP,
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OPTSTR_GREP,
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&pattern_head, &fopt,
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&slines_after, &slines_before, &Copt);
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if (option_mask32 & GREP_OPT_C) {
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if (option_mask32 & OPT_C) {
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/* -C unsets prev -A and -B, but following -A or -B
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may override it */
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if (!(option_mask32 & GREP_OPT_A)) /* not overridden */
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if (!(option_mask32 & OPT_A)) /* not overridden */
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slines_after = Copt;
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if (!(option_mask32 & GREP_OPT_B)) /* not overridden */
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if (!(option_mask32 & OPT_B)) /* not overridden */
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slines_before = Copt;
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option_mask32 |= GREP_OPT_A|GREP_OPT_B; /* for parser */
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option_mask32 |= OPT_A|OPT_B; /* for parser */
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}
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if (option_mask32 & GREP_OPT_A) {
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if (option_mask32 & OPT_A) {
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lines_after = xatoi_u(slines_after);
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}
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if (option_mask32 & GREP_OPT_B) {
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if (option_mask32 & OPT_B) {
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lines_before = xatoi_u(slines_before);
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}
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/* sanity checks */
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if (option_mask32 & (GREP_OPT_c|GREP_OPT_q|GREP_OPT_l|GREP_OPT_L)) {
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option_mask32 &= ~GREP_OPT_n;
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if (option_mask32 & (OPT_c|OPT_q|OPT_l|OPT_L)) {
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option_mask32 &= ~OPT_n;
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lines_before = 0;
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lines_after = 0;
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} else if (lines_before > 0)
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@ -365,10 +387,10 @@ int grep_main(int argc, char **argv)
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#else
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/* with auto sanity checks */
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opt_complementary = "H-h:e::f::c-n:q-n:l-n";
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getopt32(argc, argv, GREP_OPTS OPT_EGREP,
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getopt32(argc, argv, OPTSTR_GREP,
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&pattern_head, &fopt);
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#endif
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invert_search = ((option_mask32 & GREP_OPT_v) != 0); /* 0 | 1 */
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invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
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if (pattern_head != NULL) {
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/* convert char *argv[] to grep_list_data_t */
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@ -377,20 +399,20 @@ int grep_main(int argc, char **argv)
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for (cur = pattern_head; cur; cur = cur->link)
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cur->data = new_grep_list_data(cur->data, 0);
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}
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if (option_mask32 & GREP_OPT_f)
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if (option_mask32 & OPT_f)
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load_regexes_from_file(fopt);
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if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')
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option_mask32 |= GREP_OPT_F;
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option_mask32 |= OPT_F;
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if (!(option_mask32 & GREP_OPT_o))
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if (!(option_mask32 & (OPT_o | OPT_w)))
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reflags = REG_NOSUB;
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if (ENABLE_FEATURE_GREP_EGREP_ALIAS &&
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(applet_name[0] == 'e' || (option_mask32 & GREP_OPT_E)))
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(applet_name[0] == 'e' || (option_mask32 & OPT_E)))
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reflags |= REG_EXTENDED;
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if (option_mask32 & GREP_OPT_i)
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if (option_mask32 & OPT_i)
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reflags |= REG_ICASE;
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argv += optind;
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@ -399,24 +421,22 @@ int grep_main(int argc, char **argv)
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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 (pattern_head == NULL) {
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char *pattern;
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if (*argv == NULL)
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bb_show_usage();
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else {
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char *pattern = new_grep_list_data(*argv++, 0);
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pattern = new_grep_list_data(*argv++, 0);
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llist_add_to(&pattern_head, pattern);
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argc--;
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}
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}
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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)
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print_filename = 1;
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/* -H / -h of course override */
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if (option_mask32 & GREP_OPT_H)
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if (option_mask32 & OPT_H)
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print_filename = 1;
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if (option_mask32 & GREP_OPT_h)
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if (option_mask32 & OPT_h)
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print_filename = 0;
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/* If no files were specified, or '-' was specified, take input from
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@ -430,10 +450,10 @@ int grep_main(int argc, char **argv)
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if (!cur_file || (*cur_file == '-' && !cur_file[1])) {
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cur_file = "(standard input)";
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} else {
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if (option_mask32 & GREP_OPT_r) {
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if (option_mask32 & OPT_r) {
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struct stat st;
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if (stat(cur_file, &st) == 0 && S_ISDIR(st.st_mode)) {
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if (!(option_mask32 & GREP_OPT_h))
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if (!(option_mask32 & OPT_h))
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print_filename = 1;
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matched += grep_dir(cur_file);
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goto grep_done;
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