test/interactive-helper/libnoprofile.c

   1 #define _GNU_SOURCE
   2 #include <stdarg.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <dlfcn.h>
   6 #include <unistd.h>
   7 #include <stdio.h>
   8
   9 int vprintf(const char *format, va_list ap) {
  10         static int (*func_fprintf)(const char *format, va_list ap) = NULL;
  11         if (func_fprintf == NULL)
  12                 func_fprintf = (int (*) (const char *format, va_list ap)) dlsym(RTLD_NEXT, "vprintf");
  13
  14     va_list ap2;
  15     va_copy(ap2, ap);
  16     if (strncmp(format, "profiling:", strlen("profiling:")) == 0)
  17         return 0;
  18     int res = func_fprintf(format, ap2);
  19     va_end(ap2);
  20     return res;
  21 }
  22 int printf(const char *format, ...) {
  23     va_list ap;
  24     va_start(ap, format);
  25     int res = vprintf(format, ap);
  26     va_end(ap);
  27     return res;
  28 }
  29
  30 int vfprintf(FILE *stream, const char *format, va_list ap) {
  31         static int (*func_vfprintf)(FILE *stream, const char *format, va_list ap) = NULL;
  32         if (func_vfprintf == NULL)
  33                 func_vfprintf = (int (*) (FILE *stream, const char *format, va_list ap)) dlsym(RTLD_NEXT, "vfprintf");
  34
  35     va_list ap2;
  36     va_copy(ap2, ap);
  37     if (strncmp(format, "profiling:", strlen("profiling:")) == 0)
  38         return 0;
  39     int res = func_vfprintf(stream, format, ap2);
  40     va_end(ap2);
  41     return res;
  42 }
  43
  44 int fprintf(FILE *stream, const char *format, ...) {
  45     va_list ap;
  46     va_start(ap, format);
  47     int res = vfprintf(stream, format, ap);
  48     va_end(ap);
  49     return res;
  50 }