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auth/as: fix wrong filesystem permissions due to wrong factotum being attached

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to change user, have to (re-)mount factotum under the new user,
so it can authenticate us under the correct user for the filesystems.
This commit is contained in:
cinap_lenrek 2022-04-04 22:25:08 +00:00
parent 90a08cf1fd
commit 55a0abdd43
1 changed files with 20 additions and 0 deletions
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20
sys/src/cmd/auth/as.c
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@ -38,6 +38,22 @@ run(char **a)
sysfatal("exec: %s: %r", a[0]);
}
int
mountfactotum(void)
{
int fd;
/* get a link to factotum as new user */
fd = open("/srv/factotum", ORDWR);
if(fd < 0)
return -1;
if(mount(fd, -1, "/mnt", MREPL, "") == -1){
close(fd);
return -1;
}
return 0;
}
void
main(int argc, char *argv[])
{
@ -57,6 +73,10 @@ main(int argc, char *argv[])
if(becomeuser(argv[0]) < 0)
sysfatal("can't change uid for %s: %r", argv[0]);
if(mountfactotum() < 0)
sysfatal("can't mount factotum for uid for %s: %r", argv[0]);
if(newns(argv[0], namespace) < 0)
sysfatal("can't build namespace: %r");