mdw@git.distorted.org.uk Git - ezmlm/blob - sub_std/searchlog.c

   1 /*$Id: searchlog.c,v 1.6 1999/10/09 14:22:38 lindberg Exp $*/
   2 /*$Name: ezmlm-idx-040 $*/
   3 #include "case.h"
   4 #include "scan.h"
   5 #include "stralloc.h"
   6 #include "str.h"
   7 #include "open.h"
   8 #include "datetime.h"
   9 #include "date822fmt.h"
  10 #include "substdio.h"
  11 #include "readwrite.h"
  12 #include "strerr.h"
  13 #include "error.h"
  14 #include "errtxt.h"
  15 #include "subscribe.h"
  16
  17 static stralloc line = {0};
  18 static stralloc outline = {0};
  19 static char date[DATE822FMT];
  20 static datetime_sec when;
  21 static struct datetime dt;
  22 static substdio ssin;
  23 static char inbuf[256];
  24
  25 static void die_nomem(fatal)
  26 char *fatal;
  27 {
  28   strerr_die2x(100,fatal,ERR_NOMEM);
  29 }
  30
  31 static void lineout(subwrite,fatal)
  32 int subwrite();
  33 char *fatal;
  34 {
  35   (void) scan_ulong(line.s,&when);
  36   datetime_tai(&dt,when);               /* there is always at least a '\n' */
  37   if (!stralloc_copyb(&outline,date,date822fmt(date,&dt) - 1))
  38         die_nomem(fatal);
  39   if (!stralloc_cats(&outline,": ")) die_nomem(fatal);
  40   if (!stralloc_catb(&outline,line.s,line.len - 1)) die_nomem(fatal);
  41   if (subwrite(outline.s,outline.len) == -1)
  42         strerr_die3x(111,fatal,ERR_WRITE,"output");
  43   return;
  44 }
  45
  46 void searchlog(dir,search,subwrite,fatal)
  47 /* opens dir/Log, and outputs via subwrite(s,len) any line that matches */
  48 /* search. A '_' is search is a wildcard. Any other non-alphanum/'.' char */
  49 /* is replaced by a '_' */
  50
  51 char *dir;              /* work directory */
  52 char *search;           /* search string */
  53 int subwrite();         /* output fxn */
  54 char *fatal;            /* fatal */
  55 {
  56
  57   register unsigned char x;
  58   register unsigned char y;
  59   register unsigned char *cp;
  60   register unsigned char *cpsearch;
  61   unsigned register char *cps;
  62   unsigned register char ch;
  63   unsigned char *cplast, *cpline;
  64   unsigned int searchlen;
  65   int fd,match;
  66
  67   searchlen = str_len(search);
  68   case_lowerb(search,searchlen);
  69   cps = (unsigned char *) search;
  70   while ((ch = *(cps++))) {             /* search is potentially hostile */
  71     if (ch >= 'a' && ch <= 'z') continue;
  72     if (ch >= '0' && ch <= '9') continue;
  73     if (ch == '.' || ch == '_') continue;
  74     *(cps - 1) = '_';                   /* will [also] match char specified */
  75   }
  76
  77   if (!stralloc_copys(&line,dir)) die_nomem(fatal);
  78   if (!stralloc_cats(&line,"/Log")) die_nomem(fatal);
  79   if (!stralloc_0(&line)) die_nomem(fatal);
  80   fd = open_read(line.s);
  81   if (fd == -1)
  82     if (errno != error_noent)
  83         strerr_die4sys(111,fatal,ERR_OPEN,line.s,": ");
  84     else
  85         strerr_die3x(100,fatal,line.s,ERR_NOEXIST);
  86   substdio_fdbuf(&ssin,read,fd,inbuf,sizeof(inbuf));
  87
  88   for (;;) {
  89     if (getln(&ssin,&line,&match,'\n') == -1)
  90       strerr_die2sys(111,fatal,ERR_READ_INPUT);
  91     if (!match) break;
  92     if (!searchlen) {
  93       lineout(subwrite,fatal);
  94     } else {            /* simple case-insensitive search */
  95       cpline = (unsigned char *) line.s - 1;
  96       cplast = cpline + line.len - searchlen; /* line has \0 at the end */
  97       while ((cp = ++cpline) <= cplast) {
  98         cpsearch = (unsigned char *) search;
  99         for (;;) {
 100           x = *cpsearch++;
 101           if (!x) break;
 102           y = *cp++ - 'A';
 103           if (y <= 'Z' - 'A') y += 'a'; else y += 'A';
 104           if (x != y && x != '_') break;                /* '_' = wildcard */
 105         }
 106         if (!x) {
 107           lineout(subwrite,fatal);
 108           break;
 109         }
 110       }
 111     }
 112   }
 113   close(fd);
 114 }