summaryrefslogtreecommitdiffstats
path: root/debian/rules.d/scripts/mod/modpost.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--debian/rules.d/scripts/mod/modpost.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/debian/rules.d/scripts/mod/modpost.c b/debian/rules.d/scripts/mod/modpost.c
new file mode 100644
index 000000000..d574957ae
--- /dev/null
+++ b/debian/rules.d/scripts/mod/modpost.c
@@ -0,0 +1,136 @@
+#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);
+}