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#include <elf.h>
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "modpost-opts.h"
int main (int argc, char *argv[])
{
char const *data, *class;
char *list_name = NULL;
char *name = NULL;
char prog[1024];
unsigned char ei[EI_NIDENT];
int opt;
FILE *file;
while ((opt = getopt (argc, argv, GETOPT_OPTIONS)) != -1)
{
switch(opt)
{
GETOPT_CASE
break;
case 'T':
list_name = optarg;
break;
default:
return EXIT_FAILURE;
}
}
if (optind != argc)
{
name = argv[optind];
}
else if (list_name)
{
size_t name_len;
int is_stdin = strcmp (list_name, "-") == 0;
/* Read first line of list file */
if (is_stdin)
{
file = stdin;
setvbuf(stdin, NULL, _IONBF, 0); /* don't over-read */
}
else
{
file = fopen (list_name, "r");
if (!file)
{
fprintf (stderr, "Can't open \"%s\"\n", list_name);
return EXIT_FAILURE;
}
}
if (getline (&name, &name_len, file) < 0)
{
if (errno)
{
fprintf (stderr, "Can't read \"%s\"\n", list_name);
return EXIT_FAILURE;
}
else
{
/* Empty list */
return EXIT_SUCCESS;
}
}
if (!is_stdin)
fclose(file);
/* Remove new-line */
name [strcspn (name, "\n")] = 0;
/* If this came from stdin, we need to add the first name to the
* arguments, because the upstream modpost can't read it again.
*/
if (is_stdin)
{
char **new_argv = malloc (sizeof(*argv) * (argc + 2));
memcpy(new_argv, argv, sizeof(*argv) * argc);
new_argv [argc] = name;
new_argv [argc + 1] = NULL;
argv = new_argv;
}
}
else
{
/* Empty list */
return EXIT_SUCCESS;
}
if (!(file = fopen (name, "r")))
{
fprintf (stderr, "Can't open \"%s\"\n", name);
return EXIT_FAILURE;
}
if (fread (ei, 1, EI_NIDENT, file) != EI_NIDENT)
{
fprintf (stderr, "Error: input truncated\n");
return EXIT_FAILURE;
}
if (memcmp (ei, ELFMAG, SELFMAG) != 0)
{
fprintf (stderr, "Error: not ELF\n");
return EXIT_FAILURE;
}
switch (ei[EI_DATA]) {
case ELFDATA2LSB:
data = "lsb";
break;
case ELFDATA2MSB:
data = "msb";
break;
default:
return EXIT_FAILURE;
}
switch (ei[EI_CLASS]) {
case ELFCLASS32:
class = "32";
break;
case ELFCLASS64:
class = "64";
break;
default:
return EXIT_FAILURE;
}
snprintf (prog, sizeof prog, "%s.real-%s-%s", argv[0], data, class);
return execv (prog, argv);
}
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