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exile.h
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Add qssb_append_path_polic{ies,y}: Convenience function to add path policies

This commit is contained in:
Albert S. 2021-05-15 20:40:11 +02:00
parent bb02e40101
commit fcebed557c
1 changed files with 39 additions and 2 deletions
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41
qssb.h
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@ -29,6 +29,7 @@
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/random.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
@ -102,6 +103,7 @@
#define QSSB_FS_ALLOW_WRITE_FILE (1 << 16)
#define QSSB_FS_ALLOW_READ_DIR (1 << 17)
#define QSSB_FS_ALLOW_REMOVE (1 << 18)
#ifndef landlock_create_ruleset
static inline int landlock_create_ruleset(
const struct landlock_ruleset_attr *const attr,
@ -174,7 +176,10 @@ struct qssb_policy
int *allowed_syscalls;
char chroot_target_path[PATH_MAX];
const char *chdir_path;
/* Do not manually add policies here, use qssb_append_path_polic*() */
struct qssb_path_policy *path_policies;
struct qssb_path_policy **path_policies_tail;
};
/* Creates the default policy
@ -192,9 +197,43 @@ struct qssb_policy *qssb_init_policy()
result->mount_path_policies_to_chroot = 0;
result->chroot_target_path[0] = '\0';
result->path_policies = NULL;
result->path_policies_tail = &(result->path_policies);
return result;
}
int qssb_append_path_policies(struct qssb_policy *qssb_policy, unsigned int path_policy, ...)
{
va_list args;
const char *path;
va_start(args, path_policy);
path = va_arg(args, char*);
while(path != NULL)
{
struct qssb_path_policy *newpolicy = calloc(1, sizeof(struct qssb_path_policy));
if(newpolicy == NULL)
{
QSSB_LOG_ERROR("Failed to allocate memory for path policy\n");
return -1;
}
newpolicy->path = path;
newpolicy->policy = path_policy;
newpolicy->next = NULL;
*(qssb_policy->path_policies_tail) = newpolicy;
qssb_policy->path_policies_tail = &(newpolicy->next);
path = va_arg(args, char*);
}
va_end(args);
return 0;
}
int qssb_append_path_policy(struct qssb_policy *qssb_policy, unsigned int path_policy, const char *path)
{
return qssb_append_path_policies(qssb_policy, path_policy, path, NULL);
}
/*
* Fills buffer with random characters a-z.
@ -275,8 +314,6 @@ static int mkdir_structure(const char *p, mode_t mode)
return 0;
}
/* @returns: argument for mount(2) flags */
static int get_policy_mount_flags(struct qssb_path_policy *policy)
{