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    revision 532 by niro, Sat Sep 1 22:45:15 2007 UTC revision 816 by niro, Fri Apr 24 18:33:46 2009 UTC
    # Line 7  Line 7 
    7   *   *
    8   * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.   * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
    9   */   */
    10  /* BB_AUDIT SUSv3 defects - unsupported option -x.  */  /* BB_AUDIT SUSv3 defects - unsupported option -x "match whole line only". */
    11  /* BB_AUDIT GNU defects - always acts as -a.  */  /* BB_AUDIT GNU defects - always acts as -a.  */
    12  /* http://www.opengroup.org/onlinepubs/007904975/utilities/grep.html */  /* http://www.opengroup.org/onlinepubs/007904975/utilities/grep.html */
    13  /*  /*
    # Line 19  Line 19 
    19   * (C) 2006 Jac Goudsmit added -o option   * (C) 2006 Jac Goudsmit added -o option
    20   */   */
    21    
    22  #include "busybox.h"  #include "libbb.h"
    23  #include "xregex.h"  #include "xregex.h"
    24    
       
    25  /* options */  /* options */
    26  #define GREP_OPTS "lnqvscFiHhe:f:Lor"  #define OPTSTR_GREP \
    27  #define GREP_OPT_l (1<<0)   "lnqvscFiHhe:f:Lorm:" \
    28  #define PRINT_FILES_WITH_MATCHES (option_mask32 & GREP_OPT_l)   USE_FEATURE_GREP_CONTEXT("A:B:C:") \
    29  #define GREP_OPT_n (1<<1)   USE_FEATURE_GREP_EGREP_ALIAS("E") \
    30  #define PRINT_LINE_NUM (option_mask32 & GREP_OPT_n)   USE_DESKTOP("w") \
    31  #define GREP_OPT_q (1<<2)   "aI"
    32  #define BE_QUIET (option_mask32 & GREP_OPT_q)  /* ignored: -a "assume all files to be text" */
    33  #define GREP_OPT_v (1<<3)  /* ignored: -I "assume binary files have no matches" */
    34  #define GREP_OPT_s (1<<4)  
    35  #define SUPPRESS_ERR_MSGS (option_mask32 & GREP_OPT_s)  enum {
    36  #define GREP_OPT_c (1<<5)   OPTBIT_l, /* list matched file names only */
    37  #define PRINT_MATCH_COUNTS (option_mask32 & GREP_OPT_c)   OPTBIT_n, /* print line# */
    38  #define GREP_OPT_F (1<<6)   OPTBIT_q, /* quiet - exit(EXIT_SUCCESS) of first match */
    39  #define FGREP_FLAG (option_mask32 & GREP_OPT_F)   OPTBIT_v, /* invert the match, to select non-matching lines */
    40  #define GREP_OPT_i (1<<7)   OPTBIT_s, /* suppress errors about file open errors */
    41  #define GREP_OPT_H (1<<8)   OPTBIT_c, /* count matches per file (suppresses normal output) */
    42  #define GREP_OPT_h (1<<9)   OPTBIT_F, /* literal match */
    43  #define GREP_OPT_e (1<<10)   OPTBIT_i, /* case-insensitive */
    44  #define GREP_OPT_f (1<<11)   OPTBIT_H, /* force filename display */
    45  #define GREP_OPT_L (1<<12)   OPTBIT_h, /* inhibit filename display */
    46  #define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & GREP_OPT_L)   OPTBIT_e, /* -e PATTERN */
    47  #define GREP_OPT_o (1<<13)   OPTBIT_f, /* -f FILE_WITH_PATTERNS */
    48  #define GREP_OPT_r (1<<14)   OPTBIT_L, /* list unmatched file names only */
    49  #if ENABLE_FEATURE_GREP_CONTEXT   OPTBIT_o, /* show only matching parts of lines */
    50  # define GREP_OPT_CONTEXT "A:B:C:"   OPTBIT_r, /* recurse dirs */
    51  # define GREP_OPT_A (1<<15)   OPTBIT_m, /* -m MAX_MATCHES */
    52  # define GREP_OPT_B (1<<16)   USE_FEATURE_GREP_CONTEXT(    OPTBIT_A ,) /* -A NUM: after-match context */
    53  # define GREP_OPT_C (1<<17)   USE_FEATURE_GREP_CONTEXT(    OPTBIT_B ,) /* -B NUM: before-match context */
    54  # define GREP_OPT_E (1<<18)   USE_FEATURE_GREP_CONTEXT(    OPTBIT_C ,) /* -C NUM: -A and -B combined */
    55  #else   USE_FEATURE_GREP_EGREP_ALIAS(OPTBIT_E ,) /* extended regexp */
    56  # define GREP_OPT_CONTEXT ""   USE_DESKTOP(                 OPTBIT_w ,) /* whole word match */
    57  # define GREP_OPT_A 0   OPT_l = 1 << OPTBIT_l,
    58  # define GREP_OPT_B 0   OPT_n = 1 << OPTBIT_n,
    59  # define GREP_OPT_C 0   OPT_q = 1 << OPTBIT_q,
    60  # define GREP_OPT_E (1<<15)   OPT_v = 1 << OPTBIT_v,
    61  #endif   OPT_s = 1 << OPTBIT_s,
    62  #if ENABLE_FEATURE_GREP_EGREP_ALIAS   OPT_c = 1 << OPTBIT_c,
    63  # define OPT_EGREP "E"   OPT_F = 1 << OPTBIT_F,
    64  #else   OPT_i = 1 << OPTBIT_i,
    65  # define OPT_EGREP ""   OPT_H = 1 << OPTBIT_H,
    66  #endif   OPT_h = 1 << OPTBIT_h,
    67     OPT_e = 1 << OPTBIT_e,
    68  typedef unsigned char byte_t;   OPT_f = 1 << OPTBIT_f,
    69     OPT_L = 1 << OPTBIT_L,
    70  static int reflags;   OPT_o = 1 << OPTBIT_o,
    71  static byte_t invert_search;   OPT_r = 1 << OPTBIT_r,
    72  static byte_t print_filename;   OPT_m = 1 << OPTBIT_m,
    73  static byte_t open_errors;   OPT_A = USE_FEATURE_GREP_CONTEXT(    (1 << OPTBIT_A)) + 0,
    74     OPT_B = USE_FEATURE_GREP_CONTEXT(    (1 << OPTBIT_B)) + 0,
    75     OPT_C = USE_FEATURE_GREP_CONTEXT(    (1 << OPTBIT_C)) + 0,
    76     OPT_E = USE_FEATURE_GREP_EGREP_ALIAS((1 << OPTBIT_E)) + 0,
    77     OPT_w = USE_DESKTOP(                 (1 << OPTBIT_w)) + 0,
    78    };
    79    
    80    #define PRINT_FILES_WITH_MATCHES    (option_mask32 & OPT_l)
    81    #define PRINT_LINE_NUM              (option_mask32 & OPT_n)
    82    #define BE_QUIET                    (option_mask32 & OPT_q)
    83    #define SUPPRESS_ERR_MSGS           (option_mask32 & OPT_s)
    84    #define PRINT_MATCH_COUNTS          (option_mask32 & OPT_c)
    85    #define FGREP_FLAG                  (option_mask32 & OPT_F)
    86    #define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & OPT_L)
    87    
    88    struct globals {
    89     int max_matches;
    90    #if !ENABLE_EXTRA_COMPAT
    91     int reflags;
    92    #else
    93     RE_TRANSLATE_TYPE case_fold; /* RE_TRANSLATE_TYPE is [[un]signed] char* */
    94    #endif
    95     smalluint invert_search;
    96     smalluint print_filename;
    97     smalluint open_errors;
    98  #if ENABLE_FEATURE_GREP_CONTEXT  #if ENABLE_FEATURE_GREP_CONTEXT
    99  static int lines_before;   smalluint did_print_line;
    100  static int lines_after;   int lines_before;
    101  static char **before_buf;   int lines_after;
    102  static int last_line_printed;   char **before_buf;
    103  #endif /* ENABLE_FEATURE_GREP_CONTEXT */   USE_EXTRA_COMPAT(size_t *before_buf_size;)
    104     int last_line_printed;
    105    #endif
    106     /* globals used internally */
    107     llist_t *pattern_head;   /* growable list of patterns to match */
    108     const char *cur_file;    /* the current file we are reading */
    109    };
    110    #define G (*(struct globals*)&bb_common_bufsiz1)
    111    #define INIT_G() do { \
    112     struct G_sizecheck { \
    113     char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
    114     }; \
    115    } while (0)
    116    #define max_matches       (G.max_matches         )
    117    #if !ENABLE_EXTRA_COMPAT
    118    #define reflags           (G.reflags             )
    119    #else
    120    #define case_fold         (G.case_fold           )
    121    /* http://www.delorie.com/gnu/docs/regex/regex_46.html */
    122    #define reflags           re_syntax_options
    123    #undef REG_NOSUB
    124    #undef REG_EXTENDED
    125    #undef REG_ICASE
    126    #define REG_NOSUB    bug:is:here /* should not be used */
    127    #define REG_EXTENDED RE_SYNTAX_EGREP
    128    #define REG_ICASE    bug:is:here /* should not be used */
    129    #endif
    130    #define invert_search     (G.invert_search       )
    131    #define print_filename    (G.print_filename      )
    132    #define open_errors       (G.open_errors         )
    133    #define did_print_line    (G.did_print_line      )
    134    #define lines_before      (G.lines_before        )
    135    #define lines_after       (G.lines_after         )
    136    #define before_buf        (G.before_buf          )
    137    #define before_buf_size   (G.before_buf_size     )
    138    #define last_line_printed (G.last_line_printed   )
    139    #define pattern_head      (G.pattern_head        )
    140    #define cur_file          (G.cur_file            )
    141    
     /* globals used internally */  
     static llist_t *pattern_head;   /* growable list of patterns to match */  
     static const char *cur_file;    /* the current file we are reading */  
    142    
    143  typedef struct GREP_LIST_DATA {  typedef struct grep_list_data_t {
    144   char *pattern;   char *pattern;
    145   regex_t preg;  /* for GNU regex, matched_range must be persistent across grep_file() calls */
    146  #define PATTERN_MEM_A 1  #if !ENABLE_EXTRA_COMPAT
    147     regex_t compiled_regex;
    148     regmatch_t matched_range;
    149    #else
    150     struct re_pattern_buffer compiled_regex;
    151     struct re_registers matched_range;
    152    #endif
    153    #define ALLOCATED 1
    154  #define COMPILED 2  #define COMPILED 2
    155   int flg_mem_alocated_compiled;   int flg_mem_alocated_compiled;
    156  } grep_list_data_t;  } grep_list_data_t;
    157    
    158  static void print_line(const char *line, int linenum, char decoration)  #if !ENABLE_EXTRA_COMPAT
    159    #define print_line(line, line_len, linenum, decoration) \
    160     print_line(line, linenum, decoration)
    161    #endif
    162    static void print_line(const char *line, size_t line_len, int linenum, char decoration)
    163  {  {
    164  #if ENABLE_FEATURE_GREP_CONTEXT  #if ENABLE_FEATURE_GREP_CONTEXT
    165     /* Happens when we go to next file, immediately hit match
    166     * and try to print prev context... from prev file! Don't do it */
    167     if (linenum < 1)
    168     return;
    169   /* possibly print the little '--' separator */   /* possibly print the little '--' separator */
    170   if ((lines_before || lines_after) && last_line_printed &&   if ((lines_before || lines_after) && did_print_line
    171   last_line_printed < linenum - 1) {   && last_line_printed != linenum - 1
    172     ) {
    173   puts("--");   puts("--");
    174   }   }
    175     /* guard against printing "--" before first line of first file */
    176     did_print_line = 1;
    177   last_line_printed = linenum;   last_line_printed = linenum;
    178  #endif  #endif
    179   if (print_filename)   if (print_filename)
    # Line 107  static void print_line(const char *line, Line 181  static void print_line(const char *line,
    181   if (PRINT_LINE_NUM)   if (PRINT_LINE_NUM)
    182   printf("%i%c", linenum, decoration);   printf("%i%c", linenum, decoration);
    183   /* Emulate weird GNU grep behavior with -ov */   /* Emulate weird GNU grep behavior with -ov */
    184   if ((option_mask32 & (GREP_OPT_v+GREP_OPT_o)) != (GREP_OPT_v+GREP_OPT_o))   if ((option_mask32 & (OPT_v|OPT_o)) != (OPT_v|OPT_o)) {
    185    #if !ENABLE_EXTRA_COMPAT
    186   puts(line);   puts(line);
    187    #else
    188     fwrite(line, 1, line_len, stdout);
    189     putchar('\n');
    190    #endif
    191     }
    192  }  }
    193    
    194    #if ENABLE_EXTRA_COMPAT
    195    /* Unlike getline, this one removes trailing '\n' */
    196    static ssize_t FAST_FUNC bb_getline(char **line_ptr, size_t *line_alloc_len, FILE *file)
    197    {
    198     ssize_t res_sz;
    199     char *line;
    200    
    201     res_sz = getline(line_ptr, line_alloc_len, file);
    202     line = *line_ptr;
    203    
    204     if (res_sz > 0) {
    205     if (line[res_sz - 1] == '\n')
    206     line[--res_sz] = '\0';
    207     } else {
    208     free(line); /* uclibc allocates a buffer even on EOF. WTF? */
    209     }
    210     return res_sz;
    211    }
    212    #endif
    213    
    214  static int grep_file(FILE *file)  static int grep_file(FILE *file)
    215  {  {
    216   char *line;   smalluint found;
      byte_t ret;  
    217   int linenum = 0;   int linenum = 0;
    218   int nmatches = 0;   int nmatches = 0;
    219   regmatch_t regmatch;  #if !ENABLE_EXTRA_COMPAT
    220     char *line;
    221    #else
    222     char *line = NULL;
    223     ssize_t line_len;
    224     size_t line_alloc_len;
    225    #define rm_so start[0]
    226    #define rm_eo end[0]
    227    #endif
    228  #if ENABLE_FEATURE_GREP_CONTEXT  #if ENABLE_FEATURE_GREP_CONTEXT
    229   int print_n_lines_after = 0;   int print_n_lines_after = 0;
    230   int curpos = 0; /* track where we are in the circular 'before' buffer */   int curpos = 0; /* track where we are in the circular 'before' buffer */
    231   int idx = 0; /* used for iteration through the circular buffer */   int idx = 0; /* used for iteration through the circular buffer */
    232    #else
    233     enum { print_n_lines_after = 0 };
    234  #endif /* ENABLE_FEATURE_GREP_CONTEXT */  #endif /* ENABLE_FEATURE_GREP_CONTEXT */
    235    
    236   while ((line = xmalloc_getline(file)) != NULL) {   while (
    237    #if !ENABLE_EXTRA_COMPAT
    238     (line = xmalloc_fgetline(file)) != NULL
    239    #else
    240     (line_len = bb_getline(&line, &line_alloc_len, file)) >= 0
    241    #endif
    242     ) {
    243   llist_t *pattern_ptr = pattern_head;   llist_t *pattern_ptr = pattern_head;
    244   grep_list_data_t * gl;   grep_list_data_t *gl = gl; /* for gcc */
    245    
    246   linenum++;   linenum++;
    247   ret = 0;   found = 0;
    248   while (pattern_ptr) {   while (pattern_ptr) {
    249   gl = (grep_list_data_t *)pattern_ptr->data;   gl = (grep_list_data_t *)pattern_ptr->data;
    250   if (FGREP_FLAG) {   if (FGREP_FLAG) {
    251   ret = strstr(line, gl->pattern) != NULL;   found |= (strstr(line, gl->pattern) != NULL);
    252   } else {   } else {
      /*  
      * test for a postitive-assertion match (regexec returns success (0)  
      * and the user did not specify invert search), or a negative-assertion  
      * match (regexec returns failure (REG_NOMATCH) and the user specified  
      * invert search)  
      */  
    253   if (!(gl->flg_mem_alocated_compiled & COMPILED)) {   if (!(gl->flg_mem_alocated_compiled & COMPILED)) {
    254   gl->flg_mem_alocated_compiled |= COMPILED;   gl->flg_mem_alocated_compiled |= COMPILED;
    255   xregcomp(&(gl->preg), gl->pattern, reflags);  #if !ENABLE_EXTRA_COMPAT
    256     xregcomp(&gl->compiled_regex, gl->pattern, reflags);
    257    #else
    258     memset(&gl->compiled_regex, 0, sizeof(gl->compiled_regex));
    259     gl->compiled_regex.translate = case_fold; /* for -i */
    260     if (re_compile_pattern(gl->pattern, strlen(gl->pattern), &gl->compiled_regex))
    261     bb_error_msg_and_die("bad regex '%s'", gl->pattern);
    262    #endif
    263     }
    264    #if !ENABLE_EXTRA_COMPAT
    265     gl->matched_range.rm_so = 0;
    266     gl->matched_range.rm_eo = 0;
    267    #endif
    268     if (
    269    #if !ENABLE_EXTRA_COMPAT
    270     regexec(&gl->compiled_regex, line, 1, &gl->matched_range, 0) == 0
    271    #else
    272     re_search(&gl->compiled_regex, line, line_len,
    273     /*start:*/ 0, /*range:*/ line_len,
    274     &gl->matched_range) >= 0
    275    #endif
    276     ) {
    277     if (!(option_mask32 & OPT_w))
    278     found = 1;
    279     else {
    280     char c = ' ';
    281     if (gl->matched_range.rm_so)
    282     c = line[gl->matched_range.rm_so - 1];
    283     if (!isalnum(c) && c != '_') {
    284     c = line[gl->matched_range.rm_eo];
    285     if (!c || (!isalnum(c) && c != '_'))
    286     found = 1;
    287     }
    288     }
    289   }   }
      regmatch.rm_so = 0;  
      regmatch.rm_eo = 0;  
      ret |= regexec(&(gl->preg), line, 1, &regmatch, 0) == 0;  
    290   }   }
    291     /* If it's non-inverted search, we can stop
    292     * at first match */
    293     if (found && !invert_search)
    294     goto do_found;
    295   pattern_ptr = pattern_ptr->link;   pattern_ptr = pattern_ptr->link;
    296   } /* while (pattern_ptr) */   } /* while (pattern_ptr) */
    297    
    298   if (ret ^ invert_search) {   if (found ^ invert_search) {
    299     do_found:
    300   if (PRINT_FILES_WITH_MATCHES || BE_QUIET)   /* keep track of matches */
    301   free(line);   nmatches++;
    302    
    303   /* if we found a match but were told to be quiet, stop here */   /* quiet/print (non)matching file names only? */
    304   if (BE_QUIET || PRINT_FILES_WITHOUT_MATCHES)   if (option_mask32 & (OPT_q|OPT_l|OPT_L)) {
    305   return -1;   free(line); /* we don't need line anymore */
    306     if (BE_QUIET) {
    307   /* keep track of matches */   /* manpage says about -q:
    308   nmatches++;   * "exit immediately with zero status
    309     * if any match is found,
    310     * even if errors were detected" */
    311     exit(EXIT_SUCCESS);
    312     }
    313   /* if we're just printing filenames, we stop after the first match */   /* if we're just printing filenames, we stop after the first match */
    314   if (PRINT_FILES_WITH_MATCHES)   if (PRINT_FILES_WITH_MATCHES) {
    315   break;   puts(cur_file);
    316     /* fall through to "return 1" */
    317     }
    318     /* OPT_L aka PRINT_FILES_WITHOUT_MATCHES: return early */
    319     return 1; /* one match */
    320     }
    321    
      /* print the matched line */  
      if (PRINT_MATCH_COUNTS == 0) {  
    322  #if ENABLE_FEATURE_GREP_CONTEXT  #if ENABLE_FEATURE_GREP_CONTEXT
    323   int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;   /* Were we printing context and saw next (unwanted) match? */
    324     if ((option_mask32 & OPT_m) && nmatches > max_matches)
    325     break;
    326    #endif
    327    
    328   /* if we were told to print 'before' lines and there is at least   /* print the matched line */
    329   * one line in the circular buffer, print them */   if (PRINT_MATCH_COUNTS == 0) {
    330   if (lines_before && before_buf[prevpos] != NULL) {  #if ENABLE_FEATURE_GREP_CONTEXT
    331   int first_buf_entry_line_num = linenum - lines_before;   int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;
       
      /* 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++;  
      }  
    332    
    333   /* now print each line in the buffer, clearing them as we go */   /* if we were told to print 'before' lines and there is at least
    334   while (before_buf[idx] != NULL) {   * one line in the circular buffer, print them */
    335   print_line(before_buf[idx], first_buf_entry_line_num, '-');   if (lines_before && before_buf[prevpos] != NULL) {
    336   free(before_buf[idx]);   int first_buf_entry_line_num = linenum - lines_before;
    337   before_buf[idx] = NULL;  
    338   idx = (idx + 1) % lines_before;   /* advance to the first entry in the circular buffer, and
    339   first_buf_entry_line_num++;   * figure out the line number is of the first line in the
    340   }   * buffer */
    341     idx = curpos;
    342     while (before_buf[idx] == NULL) {
    343     idx = (idx + 1) % lines_before;
    344     first_buf_entry_line_num++;
    345   }   }
    346    
    347   /* make a note that we need to print 'after' lines */   /* now print each line in the buffer, clearing them as we go */
    348   print_n_lines_after = lines_after;   while (before_buf[idx] != NULL) {
    349  #endif   print_line(before_buf[idx], before_buf_size[idx], first_buf_entry_line_num, '-');
    350   if (option_mask32 & GREP_OPT_o) {   free(before_buf[idx]);
    351   line[regmatch.rm_eo] = '\0';   before_buf[idx] = NULL;
    352   print_line(line + regmatch.rm_so, linenum, ':');   idx = (idx + 1) % lines_before;
    353   } else {   first_buf_entry_line_num++;
      print_line(line, linenum, ':');  
    354   }   }
    355   }   }
    356   }  
    357  #if ENABLE_FEATURE_GREP_CONTEXT   /* make a note that we need to print 'after' lines */
    358   else { /* no match */   print_n_lines_after = lines_after;
    359   /* Add the line to the circular 'before' buffer */  #endif
    360   if (lines_before) {   if (option_mask32 & OPT_o) {
    361   free(before_buf[curpos]);   if (FGREP_FLAG) {
    362   before_buf[curpos] = xstrdup(line);   /* -Fo just prints the pattern
    363   curpos = (curpos + 1) % lines_before;   * (unless -v: -Fov doesnt print anything at all) */
    364     if (found)
    365     print_line(gl->pattern, strlen(gl->pattern), linenum, ':');
    366     } else while (1) {
    367     char old = line[gl->matched_range.rm_eo];
    368     line[gl->matched_range.rm_eo] = '\0';
    369     print_line(line + gl->matched_range.rm_so,
    370     gl->matched_range.rm_eo - gl->matched_range.rm_so,
    371     linenum, ':');
    372     line[gl->matched_range.rm_eo] = old;
    373    #if !ENABLE_EXTRA_COMPAT
    374     break;
    375    #else
    376     if (re_search(&gl->compiled_regex, line, line_len,
    377     gl->matched_range.rm_eo, line_len - gl->matched_range.rm_eo,
    378     &gl->matched_range) < 0)
    379     break;
    380    #endif
    381     }
    382     } else {
    383     print_line(line, line_len, linenum, ':');
    384   }   }
    385   }   }
    386     }
    387    #if ENABLE_FEATURE_GREP_CONTEXT
    388     else { /* no match */
    389   /* if we need to print some context lines after the last match, do so */   /* if we need to print some context lines after the last match, do so */
    390   if (print_n_lines_after && (last_line_printed != linenum)) {   if (print_n_lines_after) {
    391   print_line(line, linenum, '-');   print_line(line, strlen(line), linenum, '-');
    392   print_n_lines_after--;   print_n_lines_after--;
    393     } else if (lines_before) {
    394     /* Add the line to the circular 'before' buffer */
    395     free(before_buf[curpos]);
    396     before_buf[curpos] = line;
    397     USE_EXTRA_COMPAT(before_buf_size[curpos] = line_len;)
    398     curpos = (curpos + 1) % lines_before;
    399     /* avoid free(line) - we took the line */
    400     line = NULL;
    401   }   }
    402     }
    403    
    404  #endif /* ENABLE_FEATURE_GREP_CONTEXT */  #endif /* ENABLE_FEATURE_GREP_CONTEXT */
    405    #if !ENABLE_EXTRA_COMPAT
    406   free(line);   free(line);
    407   }  #endif
    408     /* Did we print all context after last requested match? */
    409     if ((option_mask32 & OPT_m)
    410     && !print_n_lines_after && nmatches == max_matches)
    411     break;
    412     } /* while (read line) */
    413    
    414   /* special-case file post-processing for options where we don't print line   /* special-case file post-processing for options where we don't print line
    415   * matches, just filenames and possibly match counts */   * matches, just filenames and possibly match counts */
    # Line 238  static int grep_file(FILE *file) Line 421  static int grep_file(FILE *file)
    421   printf("%d\n", nmatches);   printf("%d\n", nmatches);
    422   }   }
    423    
    424   /* grep -l: print just the filename, but only if we grepped the line in the file  */   /* grep -L: print just the filename */
    425   if (PRINT_FILES_WITH_MATCHES && nmatches > 0) {   if (PRINT_FILES_WITHOUT_MATCHES) {
    426   puts(cur_file);   /* nmatches is zero, no need to check it:
    427   }   * we return 1 early if we detected a match
    428     * and PRINT_FILES_WITHOUT_MATCHES is set */
      /* grep -L: print just the filename, but only if we didn't grep the line in the file  */  
      if (PRINT_FILES_WITHOUT_MATCHES && nmatches == 0) {  
    429   puts(cur_file);   puts(cur_file);
    430   }   }
    431    
    # Line 253  static int grep_file(FILE *file) Line 434  static int grep_file(FILE *file)
    434    
    435  #if ENABLE_FEATURE_CLEAN_UP  #if ENABLE_FEATURE_CLEAN_UP
    436  #define new_grep_list_data(p, m) add_grep_list_data(p, m)  #define new_grep_list_data(p, m) add_grep_list_data(p, m)
    437  static char * add_grep_list_data(char *pattern, int flg_used_mem)  static char *add_grep_list_data(char *pattern, int flg_used_mem)
    438  #else  #else
    439  #define new_grep_list_data(p, m) add_grep_list_data(p)  #define new_grep_list_data(p, m) add_grep_list_data(p)
    440  static char * add_grep_list_data(char *pattern)  static char *add_grep_list_data(char *pattern)
    441  #endif  #endif
    442  {  {
    443   grep_list_data_t *gl = xmalloc(sizeof(grep_list_data_t));   grep_list_data_t *gl = xzalloc(sizeof(*gl));
    444   gl->pattern = pattern;   gl->pattern = pattern;
    445  #if ENABLE_FEATURE_CLEAN_UP  #if ENABLE_FEATURE_CLEAN_UP
    446   gl->flg_mem_alocated_compiled = flg_used_mem;   gl->flg_mem_alocated_compiled = flg_used_mem;
    447  #else  #else
    448   gl->flg_mem_alocated_compiled = 0;   /*gl->flg_mem_alocated_compiled = 0;*/
    449  #endif  #endif
    450   return (char *)gl;   return (char *)gl;
    451  }  }
    452    
       
    453  static void load_regexes_from_file(llist_t *fopt)  static void load_regexes_from_file(llist_t *fopt)
    454  {  {
    455   char *line;   char *line;
    # Line 281  static void load_regexes_from_file(llist Line 461  static void load_regexes_from_file(llist
    461    
    462   fopt = cur->link;   fopt = cur->link;
    463   free(cur);   free(cur);
    464   f = xfopen(ffile, "r");   f = xfopen_stdin(ffile);
    465   while ((line = xmalloc_getline(f)) != NULL) {   while ((line = xmalloc_fgetline(f)) != NULL) {
    466   llist_add_to(&pattern_head,   llist_add_to(&pattern_head,
    467   new_grep_list_data(line, PATTERN_MEM_A));   new_grep_list_data(line, ALLOCATED));
    468   }   }
    469   }   }
    470  }  }
    471    
    472    static int FAST_FUNC file_action_grep(const char *filename,
    473  static int file_action_grep(const char *filename, struct stat *statbuf, void* matched, int depth)   struct stat *statbuf UNUSED_PARAM,
    474     void* matched,
    475     int depth UNUSED_PARAM)
    476  {  {
    477   FILE *file = fopen(filename, "r");   FILE *file = fopen_for_read(filename);
    478   if (file == NULL) {   if (file == NULL) {
    479   if (!SUPPRESS_ERR_MSGS)   if (!SUPPRESS_ERR_MSGS)
    480   bb_perror_msg("%s", cur_file);   bb_simple_perror_msg(filename);
    481   open_errors = 1;   open_errors = 1;
    482   return 0;   return 0;
    483   }   }
    # Line 305  static int file_action_grep(const char * Line 487  static int file_action_grep(const char *
    487   return 1;   return 1;
    488  }  }
    489    
       
    490  static int grep_dir(const char *dir)  static int grep_dir(const char *dir)
    491  {  {
    492   int matched = 0;   int matched = 0;
    493   recursive_action(dir,   recursive_action(dir,
    494   /* recurse= */ 1,   /* recurse=yes */ ACTION_RECURSE |
    495   /* followLinks= */ 0,   /* followLinks=no */
    496   /* depthFirst= */ 1,   /* depthFirst=yes */ ACTION_DEPTHFIRST,
    497   /* fileAction= */ file_action_grep,   /* fileAction= */ file_action_grep,
    498   /* dirAction= */ NULL,   /* dirAction= */ NULL,
    499   /* userData= */ &matched,   /* userData= */ &matched,
    # Line 320  static int grep_dir(const char *dir) Line 501  static int grep_dir(const char *dir)
    501   return matched;   return matched;
    502  }  }
    503    
    504    int grep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    505  int grep_main(int argc, char **argv)  int grep_main(int argc, char **argv)
    506  {  {
    507   FILE *file;   FILE *file;
    # Line 329  int grep_main(int argc, char **argv) Line 510  int grep_main(int argc, char **argv)
    510    
    511   /* do normal option parsing */   /* do normal option parsing */
    512  #if ENABLE_FEATURE_GREP_CONTEXT  #if ENABLE_FEATURE_GREP_CONTEXT
    513   char *slines_after;   int Copt;
    514   char *slines_before;  
    515   char *Copt;   /* -H unsets -h; -C unsets -A,-B; -e,-f are lists;
    516     * -m,-A,-B,-C have numeric param */
    517   opt_complementary = "H-h:e::f::C-AB";   opt_complementary = "H-h:C-AB:e::f::m+:A+:B+:C+";
    518   getopt32(argc, argv,   getopt32(argv,
    519   GREP_OPTS GREP_OPT_CONTEXT OPT_EGREP,   OPTSTR_GREP,
    520   &pattern_head, &fopt,   &pattern_head, &fopt, &max_matches,
    521   &slines_after, &slines_before, &Copt);   &lines_after, &lines_before, &Copt);
    522    
    523   if (option_mask32 & GREP_OPT_C) {   if (option_mask32 & OPT_C) {
    524   /* -C unsets prev -A and -B, but following -A or -B   /* -C unsets prev -A and -B, but following -A or -B
    525     may override it */     may override it */
    526   if (!(option_mask32 & GREP_OPT_A)) /* not overridden */   if (!(option_mask32 & OPT_A)) /* not overridden */
    527   slines_after = Copt;   lines_after = Copt;
    528   if (!(option_mask32 & GREP_OPT_B)) /* not overridden */   if (!(option_mask32 & OPT_B)) /* not overridden */
    529   slines_before = Copt;   lines_before = Copt;
      option_mask32 |= GREP_OPT_A|GREP_OPT_B; /* for parser */  
      }  
      if (option_mask32 & GREP_OPT_A) {  
      lines_after = xatoi_u(slines_after);  
      }  
      if (option_mask32 & GREP_OPT_B) {  
      lines_before = xatoi_u(slines_before);  
    530   }   }
    531   /* sanity checks */   /* sanity checks */
    532   if (option_mask32 & (GREP_OPT_c|GREP_OPT_q|GREP_OPT_l|GREP_OPT_L)) {   if (option_mask32 & (OPT_c|OPT_q|OPT_l|OPT_L)) {
    533   option_mask32 &= ~GREP_OPT_n;   option_mask32 &= ~OPT_n;
    534   lines_before = 0;   lines_before = 0;
    535   lines_after = 0;   lines_after = 0;
    536   } else if (lines_before > 0)   } else if (lines_before > 0) {
    537   before_buf = xzalloc(lines_before * sizeof(char *));   before_buf = xzalloc(lines_before * sizeof(before_buf[0]));
    538     USE_EXTRA_COMPAT(before_buf_size = xzalloc(lines_before * sizeof(before_buf_size[0]));)
    539     }
    540  #else  #else
    541   /* with auto sanity checks */   /* with auto sanity checks */
    542   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 */
    543   getopt32(argc, argv, GREP_OPTS OPT_EGREP,   opt_complementary = "H-h:c-n:q-n:l-n:e::f::m+";
    544   &pattern_head, &fopt);   getopt32(argv, OPTSTR_GREP,
    545     &pattern_head, &fopt, &max_matches);
    546  #endif  #endif
    547   invert_search = ((option_mask32 & GREP_OPT_v) != 0); /* 0 | 1 */   invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
    548    
    549   if (pattern_head != NULL) {   if (pattern_head != NULL) {
    550   /* convert char *argv[] to grep_list_data_t */   /* convert char **argv to grep_list_data_t */
    551   llist_t *cur;   llist_t *cur;
    552    
    553   for (cur = pattern_head; cur; cur = cur->link)   for (cur = pattern_head; cur; cur = cur->link)
    554   cur->data = new_grep_list_data(cur->data, 0);   cur->data = new_grep_list_data(cur->data, 0);
    555   }   }
    556   if (option_mask32 & GREP_OPT_f)   if (option_mask32 & OPT_f)
    557   load_regexes_from_file(fopt);   load_regexes_from_file(fopt);
    558    
    559   if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')   if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')
    560   option_mask32 |= GREP_OPT_F;   option_mask32 |= OPT_F;
    561    
    562   if (!(option_mask32 & GREP_OPT_o))  #if !ENABLE_EXTRA_COMPAT
    563     if (!(option_mask32 & (OPT_o | OPT_w)))
    564   reflags = REG_NOSUB;   reflags = REG_NOSUB;
    565    #endif
    566    
    567   if (ENABLE_FEATURE_GREP_EGREP_ALIAS &&   if (ENABLE_FEATURE_GREP_EGREP_ALIAS
    568   (applet_name[0] == 'e' || (option_mask32 & GREP_OPT_E)))   && (applet_name[0] == 'e' || (option_mask32 & OPT_E))
    569     ) {
    570   reflags |= REG_EXTENDED;   reflags |= REG_EXTENDED;
    571     }
    572    #if ENABLE_EXTRA_COMPAT
    573     else {
    574     reflags = RE_SYNTAX_GREP;
    575     }
    576    #endif
    577    
    578   if (option_mask32 & GREP_OPT_i)   if (option_mask32 & OPT_i) {
    579    #if !ENABLE_EXTRA_COMPAT
    580   reflags |= REG_ICASE;   reflags |= REG_ICASE;
    581    #else
    582     int i;
    583     case_fold = xmalloc(256);
    584     for (i = 0; i < 256; i++)
    585     case_fold[i] = (unsigned char)i;
    586     for (i = 'a'; i <= 'z'; i++)
    587     case_fold[i] = (unsigned char)(i - ('a' - 'A'));
    588    #endif
    589     }
    590    
    591   argv += optind;   argv += optind;
    592   argc -= optind;   argc -= optind;
    593    
    594   /* if we didn't get a pattern from a -e and no command file was specified,   /* if we didn't get a pattern from -e and no command file was specified,
    595   * argv[optind] should be the pattern. no pattern, no worky */   * first parameter should be the pattern. no pattern, no worky */
    596   if (pattern_head == NULL) {   if (pattern_head == NULL) {
    597     char *pattern;
    598   if (*argv == NULL)   if (*argv == NULL)
    599   bb_show_usage();   bb_show_usage();
    600   else {   pattern = new_grep_list_data(*argv++, 0);
    601   char *pattern = new_grep_list_data(*argv++, 0);   llist_add_to(&pattern_head, pattern);
    602     argc--;
      llist_add_to(&pattern_head, pattern);  
      argc--;  
      }  
    603   }   }
    604    
    605   /* 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
    606   * there is more than one file to grep, we will print the filenames. */   * there is more than one file to grep, we will print the filenames. */
    607   if (argc > 1)   if (argc > 1)
    608   print_filename = 1;   print_filename = 1;
    609   /* -H / -h of course override */   /* -H / -h of course override */
    610   if (option_mask32 & GREP_OPT_H)   if (option_mask32 & OPT_H)
    611   print_filename = 1;   print_filename = 1;
    612   if (option_mask32 & GREP_OPT_h)   if (option_mask32 & OPT_h)
    613   print_filename = 0;   print_filename = 0;
    614    
    615   /* If no files were specified, or '-' was specified, take input from   /* If no files were specified, or '-' was specified, take input from
    616   * stdin. Otherwise, we grep through all the files specified. */   * stdin. Otherwise, we grep through all the files specified. */
      if (argc == 0)  
      argc++;  
    617   matched = 0;   matched = 0;
    618   while (argc--) {   do {
    619   cur_file = *argv++;   cur_file = *argv++;
    620   file = stdin;   file = stdin;
    621   if (!cur_file || (*cur_file == '-' && !cur_file[1])) {   if (!cur_file || LONE_DASH(cur_file)) {
    622   cur_file = "(standard input)";   cur_file = "(standard input)";
    623   } else {   } else {
    624   if (option_mask32 & GREP_OPT_r) {   if (option_mask32 & OPT_r) {
    625   struct stat st;   struct stat st;
    626   if (stat(cur_file, &st) == 0 && S_ISDIR(st.st_mode)) {   if (stat(cur_file, &st) == 0 && S_ISDIR(st.st_mode)) {
    627   if (!(option_mask32 & GREP_OPT_h))   if (!(option_mask32 & OPT_h))
    628   print_filename = 1;   print_filename = 1;
    629   matched += grep_dir(cur_file);   matched += grep_dir(cur_file);
    630   goto grep_done;   goto grep_done;
    631   }   }
    632   }   }
    633   /* else: fopen(dir) will succeed, but reading won't */   /* else: fopen(dir) will succeed, but reading won't */
    634   file = fopen(cur_file, "r");   file = fopen_for_read(cur_file);
    635   if (file == NULL) {   if (file == NULL) {
    636   if (!SUPPRESS_ERR_MSGS)   if (!SUPPRESS_ERR_MSGS)
    637   bb_perror_msg("%s", cur_file);   bb_simple_perror_msg(cur_file);
    638   open_errors = 1;   open_errors = 1;
    639   continue;   continue;
    640   }   }
    641   }   }
    642   matched += grep_file(file);   matched += grep_file(file);
    643   fclose_if_not_stdin(file);   fclose_if_not_stdin(file);
    644   grep_done:   grep_done: ;
    645   if (matched < 0) {   } while (--argc > 0);
      /* we found a match but were told to be quiet, stop here and  
      * return success */  
      break;  
      }  
      }  
    646    
    647   /* destroy all the elments in the pattern list */   /* destroy all the elments in the pattern list */
    648   if (ENABLE_FEATURE_CLEAN_UP) {   if (ENABLE_FEATURE_CLEAN_UP) {
    649   while (pattern_head) {   while (pattern_head) {
    650   llist_t *pattern_head_ptr = pattern_head;   llist_t *pattern_head_ptr = pattern_head;
    651   grep_list_data_t *gl =   grep_list_data_t *gl = (grep_list_data_t *)pattern_head_ptr->data;
      (grep_list_data_t *)pattern_head_ptr->data;  
    652    
    653   pattern_head = pattern_head->link;   pattern_head = pattern_head->link;
    654   if ((gl->flg_mem_alocated_compiled & PATTERN_MEM_A))   if (gl->flg_mem_alocated_compiled & ALLOCATED)
    655   free(gl->pattern);   free(gl->pattern);
    656   if ((gl->flg_mem_alocated_compiled & COMPILED))   if (gl->flg_mem_alocated_compiled & COMPILED)
    657   regfree(&(gl->preg));   regfree(&gl->compiled_regex);
    658     free(gl);
    659   free(pattern_head_ptr);   free(pattern_head_ptr);
    660   }   }
    661   }   }
    662   /* 0 = success, 1 = failed, 2 = error */   /* 0 = success, 1 = failed, 2 = error */
      /* If the -q option is specified, the exit status shall be zero  
      * if an input line is selected, even if an error was detected.  */  
      if (BE_QUIET && matched)  
      return 0;  
    663   if (open_errors)   if (open_errors)
    664   return 2;   return 2;
    665   return !matched; /* invert return value 0 = success, 1 = failed */   return !matched; /* invert return value: 0 = success, 1 = failed */
    666  }  }
    Legend:
    Removed from v.532  
    changed lines
      Added in v.816