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Reformat setuid-ing code in startup_child()

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New code does the same as old one, but is more readable (I hope).

* strace.c (startup_child): Reformat setuid-ing code.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
This commit is contained in:
Denys Vlasenko 2011-09-01 10:27:42 +02:00
parent 2e968c0bb7
commit ab034fbf09
1 changed files with 10 additions and 13 deletions
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23
strace.c
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@ -652,7 +652,7 @@ startup_child(char **argv)
kill(pid, SIGSTOP);
}
if (username != NULL || geteuid() == 0) {
if (username != NULL) {
uid_t run_euid = run_uid;
gid_t run_egid = run_gid;
@ -660,24 +660,21 @@ startup_child(char **argv)
run_euid = statbuf.st_uid;
if (statbuf.st_mode & S_ISGID)
run_egid = statbuf.st_gid;
/*
* It is important to set groups before we
* lose privileges on setuid.
*/
if (username != NULL) {
if (initgroups(username, run_gid) < 0) {
perror_msg_and_die("initgroups");
}
if (setregid(run_gid, run_egid) < 0) {
perror_msg_and_die("setregid");
}
if (setreuid(run_uid, run_euid) < 0) {
perror_msg_and_die("setreuid");
}
if (initgroups(username, run_gid) < 0) {
perror_msg_and_die("initgroups");
}
if (setregid(run_gid, run_egid) < 0) {
perror_msg_and_die("setregid");
}
if (setreuid(run_uid, run_euid) < 0) {
perror_msg_and_die("setreuid");
}
}
else
else if (geteuid() != 0)
setreuid(run_uid, run_uid);
if (!daemonized_tracer) {