xnu-3248.40.184.tar.gz

[apple/xnu.git] / libsyscall / wrappers / spawn / posix_spawn.c

diff --git a/libsyscall/wrappers/spawn/posix_spawn.c b/libsyscall/wrappers/spawn/posix_spawn.c
index 88b6cabf3115709b66480963e5bd4c9941e9a35d..4c36d0e9016017f86ed0015ed5b2cef881cfa2cf 100644 (file)
--- a/libsyscall/wrappers/spawn/posix_spawn.c
+++ b/libsyscall/wrappers/spawn/posix_spawn.c
@@ -133,7 +133,7 @@ posix_spawnattr_init(posix_spawnattr_t *attr)
                /* Default is to inherit parent's coalition(s) */
                (*psattrp)->psa_coalition_info = NULL;
 
-               (*psattrp)->reserved = NULL;
+               (*psattrp)->psa_persona_info = NULL;
 
                /*
                 * old coalition field
@@ -178,7 +178,7 @@ posix_spawnattr_init(posix_spawnattr_t *attr)
  */
 static int posix_spawn_destroyportactions_np(posix_spawnattr_t *);
 static int posix_spawn_destroycoalition_info_np(posix_spawnattr_t *);
-
+static int posix_spawn_destroypersona_info_np(posix_spawnattr_t *);
 
 int
 posix_spawnattr_destroy(posix_spawnattr_t *attr)
@@ -191,6 +191,7 @@ posix_spawnattr_destroy(posix_spawnattr_t *attr)
        psattr = *(_posix_spawnattr_t *)attr;
        posix_spawn_destroyportactions_np(attr);
        posix_spawn_destroycoalition_info_np(attr);
+       posix_spawn_destroypersona_info_np(attr);
 
        free(psattr);
        *attr = NULL;
@@ -778,6 +779,29 @@ posix_spawn_destroycoalition_info_np(posix_spawnattr_t *attr)
        return 0;
 }
 
+/*
+ * posix_spawn_destroypersona_info_np
+ * Description: clean up persona_info struct in posix_spawnattr_t attr
+ */
+static int
+posix_spawn_destroypersona_info_np(posix_spawnattr_t *attr)
+{
+       _posix_spawnattr_t psattr;
+       struct _posix_spawn_persona_info *persona;
+
+       if (attr == NULL || *attr == NULL)
+               return EINVAL;
+
+       psattr = *(_posix_spawnattr_t *)attr;
+       persona = psattr->psa_persona_info;
+       if (persona == NULL)
+               return EINVAL;
+
+       psattr->psa_persona_info = NULL;
+       free(persona);
+       return 0;
+}
+
 /*
  * posix_spawn_appendportaction_np
  * Description: append a port action, grow the array if necessary
@@ -1523,6 +1547,124 @@ posix_spawnattr_get_darwin_role_np(const posix_spawnattr_t * __restrict attr, ui
        return (0);
 }
 
+
+int
+posix_spawnattr_set_persona_np(const posix_spawnattr_t * __restrict attr, uid_t persona_id, uint32_t flags)
+{
+       _posix_spawnattr_t psattr;
+       struct _posix_spawn_persona_info *persona;
+
+       if (attr == NULL || *attr == NULL)
+               return EINVAL;
+
+       if (flags & ~POSIX_SPAWN_PERSONA_ALL_FLAGS)
+               return EINVAL;
+
+       psattr = *(_posix_spawnattr_t *)attr;
+
+       persona = psattr->psa_persona_info;
+       if (!persona) {
+               persona = (struct _posix_spawn_persona_info *)malloc(sizeof(*persona));
+               if (!persona)
+                       return ENOMEM;
+               persona->pspi_uid = 0;
+               persona->pspi_gid = 0;
+               persona->pspi_ngroups = 0;
+               persona->pspi_groups[0] = 0;
+
+               psattr->psa_persona_info = persona;
+       }
+
+       persona->pspi_id = persona_id;
+       persona->pspi_flags = flags;
+
+       return 0;
+}
+
+int
+posix_spawnattr_set_persona_uid_np(const posix_spawnattr_t * __restrict attr, uid_t uid)
+{
+       _posix_spawnattr_t psattr;
+       struct _posix_spawn_persona_info *persona;
+
+       if (attr == NULL || *attr == NULL)
+               return EINVAL;
+
+       psattr = *(_posix_spawnattr_t *)attr;
+       persona = psattr->psa_persona_info;
+       if (!persona)
+               return EINVAL;
+
+       if (!(persona->pspi_flags & (POSIX_SPAWN_PERSONA_FLAGS_OVERRIDE | POSIX_SPAWN_PERSONA_FLAGS_VERIFY)))
+               return EINVAL;
+
+       persona->pspi_uid = uid;
+
+       persona->pspi_flags |= POSIX_SPAWN_PERSONA_UID;
+
+       return 0;
+}
+
+int
+posix_spawnattr_set_persona_gid_np(const posix_spawnattr_t * __restrict attr, gid_t gid)
+{
+       _posix_spawnattr_t psattr;
+       struct _posix_spawn_persona_info *persona;
+
+       if (attr == NULL || *attr == NULL)
+               return EINVAL;
+
+       psattr = *(_posix_spawnattr_t *)attr;
+       persona = psattr->psa_persona_info;
+       if (!persona)
+               return EINVAL;
+
+       if (!(persona->pspi_flags & (POSIX_SPAWN_PERSONA_FLAGS_OVERRIDE | POSIX_SPAWN_PERSONA_FLAGS_VERIFY)))
+               return EINVAL;
+
+       persona->pspi_gid = gid;
+
+       persona->pspi_flags |= POSIX_SPAWN_PERSONA_GID;
+
+       return 0;
+}
+
+int
+posix_spawnattr_set_persona_groups_np(const posix_spawnattr_t * __restrict attr, int ngroups, gid_t *gidarray, uid_t gmuid)
+{
+       _posix_spawnattr_t psattr;
+       struct _posix_spawn_persona_info *persona;
+
+       if (attr == NULL || *attr == NULL)
+               return EINVAL;
+
+       if (gidarray == NULL)
+               return EINVAL;
+
+       if (ngroups > NGROUPS)
+               return EINVAL;
+
+       psattr = *(_posix_spawnattr_t *)attr;
+       persona = psattr->psa_persona_info;
+       if (!persona)
+               return EINVAL;
+
+       if (!(persona->pspi_flags & (POSIX_SPAWN_PERSONA_FLAGS_OVERRIDE | POSIX_SPAWN_PERSONA_FLAGS_VERIFY)))
+               return EINVAL;
+
+       persona->pspi_ngroups = ngroups;
+       for (int i = 0; i < ngroups; i++)
+               persona->pspi_groups[i] = gidarray[i];
+
+       persona->pspi_gmuid = gmuid;
+
+       persona->pspi_flags |= POSIX_SPAWN_PERSONA_GROUPS;
+
+       return 0;
+}
+
+
+
 /*
  * posix_spawn
  *
@@ -1600,6 +1742,10 @@ posix_spawn(pid_t * __restrict pid, const char * __restrict path,
                                ad.coal_info_size = sizeof(struct _posix_spawn_coalition_info);
                                ad.coal_info = psattr->psa_coalition_info;
                        }
+                       if (psattr->psa_persona_info != NULL) {
+                               ad.persona_info_size = sizeof(struct _posix_spawn_persona_info);
+                               ad.persona_info = psattr->psa_persona_info;
+                       }
                }
                if (file_actions != NULL && *file_actions != NULL) {
                        _posix_spawn_file_actions_t psactsp =