mirror of
https://codeberg.org/libreboot/lbmk.git
synced 2026-07-11 14:02:52 +02:00
Leah Rowe
132 lines
2.6 KiB
C
132 lines
2.6 KiB
C
/* SPDX-License-Identifier: MIT ( >:3 )
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* Copyright (c) 2022-2026 Leah Rowe <leah@libreboot.org> /| |\
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* / \
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* This tool lets you modify Intel GbE NVM (Gigabit Ethernet
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* Non-Volatile Memory) images, e.g. change the MAC address.
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* These images configure your Intel Gigabit Ethernet adapter.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "include/common.h"
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static void
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exit_cleanup(void);
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int
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main(int argc, char *argv[])
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{
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struct xstate *x;
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struct commands *cmd;
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struct xfile *f;
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size_t c;
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(void) lbsetprogname(argv[0]);
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if (argc < 3)
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usage();
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(void) errhook(exit_cleanup);
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#ifdef __OpenBSD
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/* https://man.openbsd.org/pledge.2 */
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/* https://man.openbsd.org/unveil.2 */
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if (pledge("stdio flock rpath wpath cpath unveil", NULL) == -1)
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exitf("pledge");
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if (unveil("/dev/urandom", "r") == -1)
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exitf("unveil");
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#endif
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#ifndef S_ISREG
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exitf(
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"Can't determine file types (S_ISREG undefined)");
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#endif
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#if ((CHAR_BIT) != 8)
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exitf("Unsupported char size");
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#endif
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if ((x = xstart(argc, argv)) == NULL)
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exitf("NULL state on init");
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/* parse user command */
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/* TODO: CHECK ACCESSES VIA xstatus() */
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set_cmd(argc, argv);
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set_cmd_args(argc, argv);
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cmd = &x->cmd[x->i];
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f = &x->f;
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#ifdef __OpenBSD__
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if ((cmd->flags & O_ACCMODE) == O_RDONLY) {
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if (unveil(f->fname, "r") == -1)
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exitf("unveil");
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} else {
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if (unveil(f->fname, "rwc") == -1)
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exitf("unveil");
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}
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if (unveil(f->tname, "rwc") == -1)
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exitf("unveil");
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if (unveil(NULL, NULL) == -1)
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exitf("unveil");
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if (pledge("stdio flock rpath wpath cpath", NULL) == -1)
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exitf("pledge");
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#endif
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if (cmd->run == NULL)
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exitf("Command not set");
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sanitize_command_list();
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open_gbe_file();
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copy_gbe();
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read_checksums();
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cmd->run();
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for (c = 0; c < items(x->cmd); c++)
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x->cmd[c].run = cmd_helper_err;
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if ((cmd->flags & O_ACCMODE) == O_RDWR)
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write_to_gbe_bin();
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exit_cleanup();
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if (f->io_err_gbe_bin)
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exitf("%s: error writing final file");
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free_and_set_null(&f->tname);
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return EXIT_SUCCESS;
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}
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static void
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exit_cleanup(void)
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{
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struct xstate *x;
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struct xfile *f;
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x = xstatus();
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if (x == NULL)
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return;
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f = &x->f;
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/* close fds if still open */
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xclose(&f->tmp_fd);
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xclose(&f->gbe_fd);
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/* unlink tmpfile if it exists */
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if (f->tname != NULL) {
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(void) unlink(f->tname);
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free_and_set_null(&f->tname);
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}
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}
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