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#include <stdio.h>
#include <stdlib.h>
#include <libgen.h>
#include "cpp.h"
#include "str.h"
#include "proc.h"
#include "xmalloc.h"
static size_t argv_len(char *const argv[])
{
size_t len = 0;
for (; argv && *argv; argv++)
len++;
return len;
}
int cpp_exec(char *in_file, char *out_file, size_t out_len, char *const argv[])
{
size_t argc = 7 + argv_len(argv);
char *tmp = xstrdup(in_file);
char **cpp_argv;
int fd, ret = -1;
char *base;
unsigned int i = 0;
base = basename(tmp);
slprintf(out_file, out_len, "/tmp/.tmp-XXXXXX-%s", base);
fd = mkstemps(out_file, strlen(base) + 1);
if (fd < 0)
goto err;
cpp_argv = xmalloc(argc * sizeof(char *));
cpp_argv[i++] = "cpp";
for (; argv && *argv; argv++, i++)
cpp_argv[i] = *argv;
cpp_argv[i++] = "-I";
cpp_argv[i++] = ETCDIRE_STRING;
cpp_argv[i++] = "-o";
cpp_argv[i++] = out_file;
cpp_argv[i++] = in_file;
cpp_argv[i++] = NULL;
ret = proc_exec("cpp", cpp_argv);
close(fd);
xfree(cpp_argv);
err:
xfree(tmp);
return ret;
}
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