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

   1 #include "substdio.h"
   2 #include "readwrite.h"
   3 #include "stralloc.h"
   4 #include "log.h"
   5 #include "now.h"
   6 #include "fmt.h"
   7 #include "open.h"
   8
   9 /* appends (not crash-proof) a line to "Log". The format is: */
  10 /* "timestamp event address[ comment]\n". address is free of ' ' */
  11 /* Unprintable chars are changed to '?'. Comment may have spaces */
  12
  13 static substdio ss;
  14 static char buf[1];
  15 static char num[FMT_ULONG];
  16 static stralloc line = {0};
  17 static stralloc fn = {0};
  18
  19 void log(dir,event,addr,comment)
  20 char *dir;
  21 char *event;
  22 char *addr;
  23 char *comment;
  24 {
  25   char ch;
  26   int fd;
  27
  28   if (!stralloc_copyb(&line,num,fmt_ulong(num,(unsigned long) now()))) return;
  29   if (!stralloc_cats(&line," ")) return;
  30   if (!stralloc_cats(&line,event)) return;
  31   if (!stralloc_cats(&line," ")) return;
  32   while (ch = *addr++) {
  33     if ((ch < 33) || (ch > 126)) ch = '?';
  34     if (!stralloc_append(&line,&ch)) return;
  35   }
  36   if (comment && *comment) {
  37     if (!stralloc_cats(&line," ")) return;
  38     while (ch = *comment++) {
  39       if (ch == '\t')
  40         ch = ' ';
  41       else
  42         if ((ch < 32) || (ch > 126)) ch = '?';
  43       if (!stralloc_append(&line,&ch)) return;
  44     }
  45   }
  46   if (!stralloc_cats(&line,"\n")) return;
  47
  48   if (!stralloc_copys(&fn,dir)) return;
  49   if (!stralloc_cats(&fn,"/Log")) return;
  50   if (!stralloc_0(&fn)) return;
  51   fd = open_append(fn.s);
  52   if (fd == -1) return;
  53   substdio_fdbuf(&ss,write,fd,buf,sizeof(buf));
  54   substdio_putflush(&ss,line.s,line.len);
  55   close(fd);
  56   return;
  57 }