mirror of
https://codeberg.org/libreboot/lbmk.git
synced 2026-07-11 14:02:52 +02:00
Leah Rowe
e731893208
otherwise, we invoke the state machine in weird conditions, where some pointers may not be initialised. we could handle this properly, but why? therefore, the errhook is called after the argc check. this patch fixes a Speicherzugriffsfehler that i got while running nvmutil with below 3 arguments Signed-off-by: Leah Rowe <leah@libreboot.org>
120 lines
2.4 KiB
C
120 lines
2.4 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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/* https://man.openbsd.org/pledge.2 */
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/* https://man.openbsd.org/unveil.2 */
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xpledgex("stdio flock rpath wpath cpath unveil", NULL);
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xunveilx("/dev/urandom", "r");
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#ifndef S_ISREG
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err_exit(ECANCELED,
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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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err_exit(ECANCELED, "Unsupported char size");
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#endif
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if ((x = xstart(argc, argv)) == NULL)
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err_exit(ECANCELED, "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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if ((cmd->flags & O_ACCMODE) == O_RDONLY)
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xunveilx(f->fname, "r");
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else
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xunveilx(f->fname, "rwc");
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xunveilx(f->tname, "rwc");
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xunveilx(NULL, NULL);
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xpledgex("stdio flock rpath wpath cpath", NULL);
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if (cmd->run == NULL)
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err_exit(errno, "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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err_exit(EIO, "%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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close_on_eintr(&f->tmp_fd);
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close_on_eintr(&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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