summaryrefslogtreecommitdiff
path: root/cpp.c
blob: 30a1404efc104bba3f09b737cc32155cf21aff06 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
#include <stdio.h>
#include <libgen.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 ret = 0;
	char *base;
	unsigned int i = 0;

	base = basename(tmp);
	slprintf(out_file, out_len, "/tmp/.tmp-%u-%s", rand(), base);

	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;

	if (proc_exec("cpp", cpp_argv))
		ret = -1;

	xfree(cpp_argv);
	xfree(tmp);
	return ret;
}