git: 511de5b1430e - main - runat.c: Add an explicit check for snprintf() failure

The branch main has been updated by rmacklem:

URL: https://cgit.FreeBSD.org/src/commit/?id=511de5b1430ea974b3dc6fcb2af28d2e10b2b25e

commit 511de5b1430ea974b3dc6fcb2af28d2e10b2b25e
Author:     Rick Macklem <rmacklem@FreeBSD.org>
AuthorDate: 2025-05-10 14:44:38 +0000
Commit:     Rick Macklem <rmacklem@FreeBSD.org>
CommitDate: 2025-05-10 14:46:17 +0000

    runat.c: Add an explicit check for snprintf() failure
    
    The check for "outsiz" too large was probably sufficient to
    catch failures, since it was cast to an unsigned (size_t).
    However, it seems appropriate to add an explicit check for
    a failed case (returning -1).
    
    Discussed with: oshogbo
    Fixes:  0660de8172cd ("runat: Add a runat(1) utility similar to the Solaris one")
---
 usr.bin/runat/runat.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/usr.bin/runat/runat.c b/usr.bin/runat/runat.c
index 66f4ebadd180..99437f3472f4 100644
--- a/usr.bin/runat/runat.c
+++ b/usr.bin/runat/runat.c
@@ -52,6 +52,8 @@ main(int argc, char *argv[])
 	pos = 0;
 	for (i = 1; i < argc; i++) {
 		outsiz = snprintf(&buf[pos], siz, "%s ", argv[i]);
+		if (outsiz <= 0)
+			errx(1, "snprintf failed: returned %d", outsiz);
 		if ((size_t)outsiz > siz)
 			errx(1, "Arguments too large");
 		pos += outsiz;