libmixp/error.c

   1 #include <errno.h>
   2 #include <stdarg.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <9p-mixp/err.h>
   6 #include "mixp_local.h"
   7
   8 /* Approach to errno handling taken from Plan 9 Port. */
   9 enum {
  10         EPLAN9 = 0x19283745,
  11 };
  12
  13 FILE* mixp_error_stream = NULL;
  14 FILE* mixp_debug_stream = NULL;
  15
  16 const char*
  17 mixp_errbuf() {
  18         char *errbuf;
  19
  20         errbuf = mixp_thread->errbuf();
  21         if(errno == EINTR)
  22                 strncpy(errbuf, "interrupted", IXP_ERRMAX);
  23         else if(errno != EPLAN9)
  24                 strncpy(errbuf, strerror(errno), IXP_ERRMAX);
  25         return errbuf;
  26 }
  27
  28 void
  29 mixp_errstr(char *buf, int n) {
  30         char tmp[IXP_ERRMAX];
  31
  32         strncpy(tmp, buf, sizeof(tmp));
  33         mixp_rerrstr(buf, n);
  34         strncpy(mixp_thread->errbuf(), tmp, IXP_ERRMAX);
  35         errno = EPLAN9;
  36 }
  37
  38 void
  39 mixp_rerrstr(char *buf, int n) {
  40         strncpy(buf, mixp_errbuf(), n);
  41 }
  42
  43 void
  44 mixp_werrstr(char *fmt, ...) {
  45         char tmp[IXP_ERRMAX];
  46         va_list ap;
  47
  48         va_start(ap, fmt);
  49         vsnprintf(tmp, sizeof(tmp), fmt, ap);
  50         va_end(ap);
  51         strncpy(mixp_thread->errbuf(), tmp, IXP_ERRMAX);
  52         errno = EPLAN9;
  53 }
  54