cpp.c

   1 #include <stdio.h>
   2 #include <libgen.h>
   3
   4 #include "cpp.h"
   5 #include "str.h"
   6 #include "proc.h"
   7 #include "xmalloc.h"
   8
   9 static size_t argv_len(char *const argv[])
  10 {
  11         size_t len = 0;
  12
  13         for (; argv && *argv; argv++)
  14                 len++;
  15
  16         return len;
  17 }
  18
  19 int cpp_exec(char *in_file, char *out_file, size_t out_len, char *const argv[])
  20 {
  21         size_t argc = 7 + argv_len(argv);
  22         char *tmp = xstrdup(in_file);
  23         char **cpp_argv;
  24         int ret = 0;
  25         char *base;
  26         unsigned int i = 0;
  27
  28         base = basename(tmp);
  29         slprintf(out_file, out_len, "/tmp/.tmp-%u-%s", rand(), base);
  30
  31         cpp_argv = xmalloc(argc * sizeof(char *));
  32
  33         cpp_argv[i++] = "cpp";
  34
  35         for (; argv && *argv; argv++, i++)
  36                 cpp_argv[i] = *argv;
  37
  38         cpp_argv[i++] = "-I";
  39         cpp_argv[i++] = ETCDIRE_STRING;
  40         cpp_argv[i++] = "-o";
  41         cpp_argv[i++] = out_file;
  42         cpp_argv[i++] = in_file;
  43         cpp_argv[i++] = NULL;
  44
  45         if (proc_exec("cpp", cpp_argv))
  46                 ret = -1;
  47
  48         xfree(cpp_argv);
  49         xfree(tmp);
  50         return ret;
  51 }