cpp.c

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