git: 3fc149c302ab - stable/13 - setusercontext(): Move priority setting in new setclasspriority()

The branch stable/13 has been updated by olce:

URL: https://cgit.FreeBSD.org/src/commit/?id=3fc149c302ab7287e063e7fdd0a0d7031947e3fb

commit 3fc149c302ab7287e063e7fdd0a0d7031947e3fb
Author:     Olivier Certner <olce@FreeBSD.org>
AuthorDate: 2023-05-29 17:09:36 +0000
Commit:     Olivier Certner <olce@FreeBSD.org>
CommitDate: 2024-02-01 21:23:52 +0000

    setusercontext(): Move priority setting in new setclasspriority()
    
    In preparation for setting priorities from '~/.login_conf' and to ease
    reading of setusercontext().
    
    No functional change.
    
    Reviewed by:            emaste
    Approved by:            emaste (mentor)
    MFC after:              3 days
    Sponsored by:           Kumacom SAS
    Differential Revision:  https://reviews.freebsd.org/D40350
    
    (cherry picked from commit 7b94ec550ef6e7b75d608e125e9b78478197d4e7)
    
    Approved by:            markj (mentor)
---
 lib/libutil/login_class.c | 97 +++++++++++++++++++++++++----------------------
 1 file changed, 52 insertions(+), 45 deletions(-)

diff --git a/lib/libutil/login_class.c b/lib/libutil/login_class.c
index 9c3285736f3b..9d8dc652d678 100644
--- a/lib/libutil/login_class.c
+++ b/lib/libutil/login_class.c
@@ -456,6 +456,56 @@ setlogincontext(login_cap_t *lc, const struct passwd *pwd, unsigned long flags)
 }
 
 
+/*
+ * Private function to set process priority.
+ */
+static void
+setclasspriority(login_cap_t * const lc, struct passwd const * const pwd)
+{
+	const rlim_t def_val = LOGIN_DEFPRI, err_val = INT64_MIN;
+	rlim_t p = login_getcapnum(lc, "priority", def_val, err_val);
+	int rc;
+
+	if (p == err_val) {
+		/* Invariant: 'lc' != NULL. */
+		syslog(LOG_WARNING,
+		    "%s%s%sLogin class '%s': "
+		    "Invalid priority specification: '%s'",
+		    pwd ? "Login '" : "",
+		    pwd ? pwd->pw_name : "",
+		    pwd ? "': " : "",
+		    lc->lc_class,
+		    login_getcapstr(lc, "priority", "", ""));
+		/* Reset the priority, as if the capability was not present. */
+		p = def_val;
+	}
+
+	if (p > PRIO_MAX) {
+		struct rtprio rtp;
+
+		rtp.type = RTP_PRIO_IDLE;
+		p += RTP_PRIO_MIN - (PRIO_MAX + 1);
+		rtp.prio = p > RTP_PRIO_MAX ? RTP_PRIO_MAX : p;
+		rc = rtprio(RTP_SET, 0, &rtp);
+	} else if (p < PRIO_MIN) {
+		struct rtprio rtp;
+
+		rtp.type = RTP_PRIO_REALTIME;
+		p += RTP_PRIO_MAX - (PRIO_MIN - 1);
+		rtp.prio = p < RTP_PRIO_MIN ? RTP_PRIO_MIN : p;
+		rc = rtprio(RTP_SET, 0, &rtp);
+	} else
+		rc = setpriority(PRIO_PROCESS, 0, (int)p);
+
+	if (rc != 0)
+		syslog(LOG_WARNING,
+		    "%s%s%sLogin class '%s': "
+		    "Setting priority failed: %m",
+		    pwd ? "Login '" : "",
+		    pwd ? pwd->pw_name : "",
+		    pwd ? "': " : "",
+		    lc ? lc->lc_class : "<none>");
+}
 
 /*
  * setusercontext()
@@ -490,51 +540,8 @@ setusercontext(login_cap_t *lc, const struct passwd *pwd, uid_t uid, unsigned in
 	flags &= ~(LOGIN_SETGROUP | LOGIN_SETLOGIN | LOGIN_SETMAC);
 
     /* Set the process priority */
-    if (flags & LOGIN_SETPRIORITY) {
-	const rlim_t def_val = LOGIN_DEFPRI, err_val = INT64_MIN;
-	rlim_t p = login_getcapnum(lc, "priority", def_val, err_val);
-	int rc;
-
-	if (p == err_val) {
-	    /* Invariant: 'lc' != NULL. */
-	    syslog(LOG_WARNING,
-		"%s%s%sLogin class '%s': "
-		"Invalid priority specification: '%s'",
-		pwd ? "Login '" : "",
-		pwd ? pwd->pw_name : "",
-		pwd ? "': " : "",
-		lc->lc_class,
-		login_getcapstr(lc, "priority", "", ""));
-	    /* Reset the priority, as if the capability was not present. */
-	    p = def_val;
-	}
-
-	if (p > PRIO_MAX) {
-	    struct rtprio rtp;
-
-	    rtp.type = RTP_PRIO_IDLE;
-	    p += RTP_PRIO_MIN - (PRIO_MAX + 1);
-	    rtp.prio = p > RTP_PRIO_MAX ? RTP_PRIO_MAX : p;
-	    rc = rtprio(RTP_SET, 0, &rtp);
-	} else if (p < PRIO_MIN) {
-	    struct rtprio rtp;
-
-	    rtp.type = RTP_PRIO_REALTIME;
-	    p += RTP_PRIO_MAX - (PRIO_MIN - 1);
-	    rtp.prio = p < RTP_PRIO_MIN ? RTP_PRIO_MIN : p;
-	    rc = rtprio(RTP_SET, 0, &rtp);
-	} else
-	    rc = setpriority(PRIO_PROCESS, 0, (int)p);
-
-	if (rc != 0)
-	    syslog(LOG_WARNING,
-		"%s%s%sLogin class '%s': "
-		"Setting priority failed: %m",
-		pwd ? "Login '" : "",
-		pwd ? pwd->pw_name : "",
-		pwd ? "': " : "",
-		lc ? lc->lc_class : "<none>");
-    }
+    if (flags & LOGIN_SETPRIORITY)
+	setclasspriority(lc, pwd);
 
     /* Setup the user's group permissions */
     if (flags & LOGIN_SETGROUP) {