diff options
Diffstat (limited to 'src/libauth/auth_chuid.c')
-rw-r--r-- | src/libauth/auth_chuid.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/libauth/auth_chuid.c b/src/libauth/auth_chuid.c new file mode 100644 index 00000000..1bfbfff9 --- /dev/null +++ b/src/libauth/auth_chuid.c @@ -0,0 +1,38 @@ +#include <u.h> +#include <libc.h> +#include <auth.h> + +/* + * become the authenticated user + */ +int +auth_chuid(AuthInfo *ai, char *ns) +{ + int rv, fd; + + if(ai == nil || ai->cap == nil){ + werrstr("no capability"); + return -1; + } + + /* change uid */ + fd = open("#¤/capuse", OWRITE); + if(fd < 0){ + werrstr("opening #¤/capuse: %r"); + return -1; + } + rv = write(fd, ai->cap, strlen(ai->cap)); + close(fd); + if(rv < 0){ + werrstr("writing %s to #¤/capuse: %r", ai->cap); + return -1; + } + + /* get a link to factotum as new user */ + fd = open("/srv/factotum", ORDWR); + if(fd >= 0) + mount(fd, -1, "/mnt", MREPL, ""); + + /* set up new namespace */ + return newns(ai->cuid, ns); +} |