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;
}
// return 0 if error
// return 0 if this is not an appimgage2 file
long unsigned int appimage2_size(const char *fname) {
ssize_t ret;
int fd;
long unsigned int size = 0;
fd = open(fname, O_RDONLY);
if (fd < 0)
return 0;
ret = pread(fd, ehdr.e_ident, EI_NIDENT, 0);
if (ret != EI_NIDENT)
goto getout;
if ((ehdr.e_ident[EI_DATA] != ELFDATA2LSB) &&
(ehdr.e_ident[EI_DATA] != ELFDATA2MSB))
goto getout;
if(ehdr.e_ident[EI_CLASS] == ELFCLASS32) {
size = read_elf32(fd);
}
else if(ehdr.e_ident[EI_CLASS] == ELFCLASS64) {
size = read_elf64(fd);
}
else {
goto getout;
}
if (size == 0)
goto getout;
// look for a LZMA header at this location
unsigned char buf[4];
ret = pread(fd, buf, 4, size);
if (ret != 4) {
size = 0;
goto getout;
}
if (memcmp(buf, "hsqs", 4) != 0)
size = 0;
getout:
close(fd);
return size;
}
