qmail/control.c at main · sagredo-dev/qmail · GitHub

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#include "readwrite.h"
#include "open.h"
#include "stralloc.h"
#include "substdio.h"
#include "error.h"
#include "control.h"
#include "alloc.h"
#include "scan.h"
#include "getln.h"

static char inbuf[64];
static stralloc line = {0};
static stralloc me = {0};
static int meok = 0;

static void striptrailingwhitespace(stralloc *sa)
{
 while (sa->len > 0)
   switch(sa->s[sa->len - 1])
    {
     case '\n': case ' ': case '\t':
       --sa->len;
       break;
     default:
       return;
    }
}

int control_init()
{
 int r;
 r = control_readline(&me,"control/me");
 if (r == 1) meok = 1;
 return r;
}

int control_rldef(stralloc *sa, char *fn, int flagme, char *def)
{
 int r;
 r = control_readline(sa,fn);
 if (r) return r;
 if (flagme) if (meok) return stralloc_copy(sa,&me) ? 1 : -1;
 if (def) return stralloc_copys(sa,def) ? 1 : -1;
 return r;
}

int control_readline(stralloc *sa, char *fn)
{
 substdio ss;
 int fd;
 int match;

 fd = open_read(fn);
 if (fd == -1) { if (errno == error_noent) return 0; return -1; }

 substdio_fdbuf(&ss,(ssize_t (*)(int,const void*,size_t))read,fd,inbuf,sizeof(inbuf));

 if (getln(&ss,sa,&match,'\n') == -1) { close(fd); return -1; }

 striptrailingwhitespace(sa);
 close(fd);
 return 1;
}

int control_readint(int *i, char *fn)
{
 unsigned long u;
 switch(control_readline(&line,fn))
  {
   case 0: return 0;
   case -1: return -1;
  }
 if (!stralloc_0(&line)) return -1;
 if (!scan_ulong(line.s,&u)) return 0;
 *i = u;
 return 1;
}

int
control_readulong(unsigned long  *i, char *fn)
{
	unsigned long   u;

	switch (control_readline(&line, fn))
	{
	case 0:
		return 0;
	case -1:
		return -1;
	}
	if (!stralloc_0(&line))
		return -1;
	if (!scan_ulong(line.s, &u))
		return 0;
	*i = u;
	return 1;
}

/*
 * read entire file in variable sa
 * without any interpretation (e.g. comments)
 * To be used in case a file contains '#' character
 * in the first column (which control_readfile() will
 * skip
 */
int
control_readnativefile(stralloc *sa, char *fn, int mode)
{
      substdio        ss;
      int             fd, match;

      if (!stralloc_copys(sa, ""))
              return -1;
      if ((fd = open_read(fn)) == -1)
      {
              if (errno == error_noent)
                      return(0);
              return -1;
      }
      substdio_fdbuf(&ss, (ssize_t (*)(int,const void*,size_t))read, fd, inbuf, sizeof(inbuf));
      for (;;)
      {
              if (getln(&ss, &line, &match, '\n') == -1)
                      break;
              if (!match && !line.len)
              {
                      close(fd);
                      return 1;
              }
              if (mode) /* for qmail-dk */
              {
                      striptrailingwhitespace(&line);
                      if (!stralloc_0(&line))
                              break;
                      if (line.s[0] && !stralloc_cat(sa, &line))
                              break;
              } else
              if (!stralloc_cat(sa, &line))
                      break;
              if (!match)
              {
                      close(fd);
                      return 1;
              }
      }
      close(fd);
      return -1;
}

int control_readfile(stralloc *sa, char *fn, int flagme)
{
 substdio ss;
 int fd;
 int match;

 if (!stralloc_copys(sa,"")) return -1;

 fd = open_read(fn);
 if (fd == -1)
  {
   if (errno == error_noent)
    {
     if (flagme && meok)
      {
       if (!stralloc_copy(sa,&me)) return -1;
       if (!stralloc_0(sa)) return -1;
       return 1;
      }
     return 0;
    }
   return -1;
  }

 substdio_fdbuf(&ss,(ssize_t (*)(int,const void*,size_t))read,fd,inbuf,sizeof(inbuf));

 for (;;)
  {
   if (getln(&ss,&line,&match,'\n') == -1) break;
   if (!match && !line.len) { close(fd); return 1; }
   striptrailingwhitespace(&line);
   if (!stralloc_0(&line)) break;
   if (line.s[0])
     if (line.s[0] != '#')
       if (!stralloc_cat(sa,&line)) break;
   if (!match) { close(fd); return 1; }
  }
 close(fd);
 return -1;
}