#include <common/compat/prctl.h>
#include <common/unix.h>
#include <common/defaults.h>
+#include <common/lttng-elf.h>
+
+#include <lttng/constant.h>
#include "runas.h"
char path[PATH_MAX];
};
+struct run_as_extract_elf_symbol_offset_data {
+ char function[LTTNG_SYMBOL_NAME_LEN];
+};
+
struct run_as_mkdir_ret {
int ret;
};
int ret;
};
+struct run_as_extract_elf_symbol_offset_ret {
+ uint64_t offset;
+};
+
enum run_as_cmd {
RUN_AS_MKDIR,
RUN_AS_OPEN,
RUN_AS_UNLINK,
RUN_AS_RMDIR_RECURSIVE,
RUN_AS_MKDIR_RECURSIVE,
+ RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET,
};
struct run_as_data {
struct run_as_open_data open;
struct run_as_unlink_data unlink;
struct run_as_rmdir_recursive_data rmdir_recursive;
+ struct run_as_extract_elf_symbol_offset_data extract_elf_symbol_offset;
} u;
uid_t uid;
gid_t gid;
struct run_as_open_ret open;
struct run_as_unlink_ret unlink;
struct run_as_rmdir_recursive_ret rmdir_recursive;
+ struct run_as_extract_elf_symbol_offset_ret extract_elf_symbol_offset;
} u;
int _errno;
bool _error;
return ret_value->u.rmdir_recursive.ret;
}
+static
+int _extract_elf_symbol_offset(struct run_as_data *data,
+ struct run_as_ret *ret_value)
+{
+ int ret = 0;
+ ret_value->_error = false;
+
+ ret = lttng_elf_get_symbol_offset(data->fd,
+ data->u.extract_elf_symbol_offset.function,
+ &ret_value->u.extract_elf_symbol_offset.offset);
+ if (ret) {
+ DBG("Failed to extract ELF function offset");
+ ret_value->_error = true;
+ }
+
+ return ret;
+}
+
+
static
run_as_fct run_as_enum_to_fct(enum run_as_cmd cmd)
{
return _rmdir_recursive;
case RUN_AS_MKDIR_RECURSIVE:
return _mkdir_recursive;
+ case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET:
+ return _extract_elf_symbol_offset;
default:
ERR("Unknown command %d", (int) cmd);
return NULL;
int ret = 0;
switch (cmd) {
+ case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET:
+ break;
default:
return 0;
}
int ret = 0;
switch (cmd) {
+ case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET:
+ break;
default:
return 0;
}
int ret = 0;
switch (cmd) {
+ case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET:
+ break;
default:
return 0;
}
return ret.u.rmdir_recursive.ret;
}
+LTTNG_HIDDEN
+int run_as_extract_elf_symbol_offset(int fd, const char* function,
+ uid_t uid, gid_t gid, uint64_t *offset)
+{
+ struct run_as_data data;
+ struct run_as_ret ret;
+
+ DBG3("extract_elf_symbol_offset() on fd=%d and function=%s "
+ "with for uid %d and gid %d", fd, function, (int) uid, (int) gid);
+
+ data.fd = fd;
+
+ strncpy(data.u.extract_elf_symbol_offset.function, function, LTTNG_SYMBOL_NAME_LEN - 1);
+
+ data.u.extract_elf_symbol_offset.function[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
+
+ run_as(RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET, &data, &ret, uid, gid);
+
+ errno = ret._errno;
+
+ if (ret._error) {
+ return -1;
+ }
+
+ *offset = ret.u.extract_elf_symbol_offset.offset;
+ return 0;
+}
+
static
int reset_sighandler(void)
{