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Use setresuid/setresgid to drop privileges

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This commit is contained in:
Kevin Lo 2010-05-16 08:03:24 +00:00
parent ee56d88b76
commit 73d6722d27
1 changed files with 8 additions and 2 deletions
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10
sbin/bsdlabel/bsdlabel.c
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@ -684,6 +684,8 @@ editit(void)
int pid, xpid;
int locstat, omask;
const char *ed;
uid_t uid;
gid_t gid;
omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
while ((pid = fork()) < 0) {
@ -699,8 +701,12 @@ editit(void)
}
if (pid == 0) {
sigsetmask(omask);
setgid(getgid());
setuid(getuid());
gid = getgid();
if (setresgid(gid, gid, gid) == -1)
err(1, "setresgid");
uid = getuid();
if (setresuid(uid, uid, uid) == -1)
err(1, "setresuid");
if ((ed = getenv("EDITOR")) == (char *)0)
ed = DEFEDITOR;
execlp(ed, ed, tmpfil, (char *)0);