int main(int argc, char **argv)
{
ssize_t ret;
int fd;
if (argc != 2) {
fprintf(stderr, "usage: %s <kernel core file>\n", argv[0]);
return 1;
}
fname = argv[1];
fd = open(fname, O_RDONLY);
if (fd < 0) {
fprintf(stderr, "Cannot open %s: %s\n",
fname, strerror(errno));
return 2;
}
ret = pread(fd, ehdr.e_ident, EI_NIDENT, 0);
if (ret != EI_NIDENT) {
fprintf(stderr, "Read of e_ident from %s failed: %s\n",
fname, strerror(errno));
return 3;
}
if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) {
fprintf(stderr, "Missing elf signature\n");
return 4;
}
if (ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
fprintf(stderr, "Bad elf version\n");
return 5;
}
if ((ehdr.e_ident[EI_CLASS] != ELFCLASS32) &&
(ehdr.e_ident[EI_CLASS] != ELFCLASS64))
{
fprintf(stderr, "Unknown elf class %u\n",
ehdr.e_ident[EI_CLASS]);
return 6;
}
if ((ehdr.e_ident[EI_DATA] != ELFDATA2LSB) &&
(ehdr.e_ident[EI_DATA] != ELFDATA2MSB))
{
fprintf(stderr, "Unkown elf data order %u\n",
ehdr.e_ident[EI_DATA]);
return 7;
}
if (ehdr.e_ident[EI_CLASS] == ELFCLASS32)
read_elf32(fd);
else
read_elf64(fd);
scan_note_headers(fd);
dump_dmesg(fd);
close(fd);
return 0;
}
void serve_client(int fd, parameters_t *pars)
{
sockprint(fd, "Enter 'h' for help\r\n");
for(;;)
{
int key;
if (sockprint(fd, "emergency console > ") == -1)
break;
if ((key = readchar(fd)) == -1)
break;
if (key < 32 || key > 126)
{
if (sockprint(fd, "\r") == -1)
break;
continue;
}
if (sockprint(fd, "%c\r\n", key) == -1)
break;
switch(key)
{
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
if (set_dmesg_loglevel(fd, key - '0') == -1)
return;
break;
case 'd':
if (dump_virtual_console(fd, pars -> vcsa0_fd) == -1)
return;
break;
case '?':
case 'h':
if (ec_help(fd) == -1)
return;
break;
case 'i':
if (dump_loadavg(fd) == -1)
return;
break;
case 'j':
if (kill_one_proc(fd) == -1)
return;
break;
case 'k':
if (kill_procs(fd) == -1)
return;
break;
case 'l':
if (dump_dmesg(fd, pars -> dmesg_buffer, pars -> dmesg_buffer_size, 0) == -1)
return;
break;
case 'm':
if (dump_dmesg(fd, pars -> dmesg_buffer, pars -> dmesg_buffer_size, 1) == -1)
return;
break;
case 'p':
if (dump_ps(fd) == -1)
return;
break;
case 'q':
return;
case 10:
case 13:
break;
default:
if (isupper(key))
do_sysreq(fd, tolower(key), pars -> sysrq_fd);
else
sockprint(fd, "'%c' is not understood\r\n", key);
break;
}
}
}