diff options
Diffstat (limited to 'src/afm-launch.c')
| -rw-r--r-- | src/afm-launch.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/afm-launch.c b/src/afm-launch.c index a66004b..f2a5065 100644 --- a/src/afm-launch.c +++ b/src/afm-launch.c @@ -104,6 +104,8 @@ struct launchparam { const char **slave_args; }; +static gid_t groupid = 0; + static char **instantiate_arguments(const char **args, struct afm_launch_desc *desc, struct launchparam *params) { const char **iter, *p, *v; @@ -210,6 +212,10 @@ static int launchexec1(struct afm_launch_desc *desc, pid_t children[2], struct l } /********* in the master child ************/ + + /* avoid set-gid effect */ + setresgid(groupid, groupid, groupid); + /* enter the process group */ rc = setpgid(0, 0); if (rc) { @@ -308,6 +314,9 @@ static int launchexec2(struct afm_launch_desc *desc, pid_t children[2], struct l close(mpipe[0]); close(spipe[1]); + /* avoid set-gid effect */ + setresgid(groupid, groupid, groupid); + /* enter the process group */ rc = setpgid(0, 0); if (rc) { @@ -380,6 +389,18 @@ static int launchexec2(struct afm_launch_desc *desc, pid_t children[2], struct l _exit(1); } +static void afm_launch_init_group() +{ + if (!groupid) { + gid_t r, e, s; + getresgid(&r, &e, &s); + if (s && s != e) + groupid = s; + else + groupid = -1; + } +} + int afm_launch(struct afm_launch_desc *desc, pid_t children[2]) { char datadir[PATH_MAX]; @@ -387,6 +408,9 @@ int afm_launch(struct afm_launch_desc *desc, pid_t children[2]) char secret[9]; struct launchparam params; + /* static init */ + afm_launch_init_group(); + /* what launcher ? */ ikl = 0; if (desc->type != NULL && *desc->type) { |