The branch main has been updated by hselasky:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=4c537df51a16ce004b184010d306e550716f49ea

commit 4c537df51a16ce004b184010d306e550716f49ea
Author:     Hans Petter Selasky <[email protected]>
AuthorDate: 2021-11-09 21:09:46 +0000
Commit:     Hans Petter Selasky <[email protected]>
CommitDate: 2021-11-09 21:12:19 +0000

    echo(1): Replace errexit() with err(3)
    
    Differential revision:  https://reviews.freebsd.org/D32501
    Submitted by:   christos@
    MFC after:      1 week
    Sponsored by:   NVIDIA Networking
---
 bin/echo/echo.c | 22 ++--------------------
 1 file changed, 2 insertions(+), 20 deletions(-)

diff --git a/bin/echo/echo.c b/bin/echo/echo.c
index f56bd5b976d8..46796ad1a27d 100644
--- a/bin/echo/echo.c
+++ b/bin/echo/echo.c
@@ -55,23 +55,6 @@ __FBSDID("$FreeBSD$");
 #include <string.h>
 #include <unistd.h>
 
-/*
- * Report an error and exit.
- * Use it instead of err(3) to avoid linking-in stdio.
- */
-static __dead2 void
-errexit(const char *prog, const char *reason)
-{
-       char *errstr = strerror(errno);
-       write(STDERR_FILENO, prog, strlen(prog));
-       write(STDERR_FILENO, ": ", 2);
-       write(STDERR_FILENO, reason, strlen(reason));
-       write(STDERR_FILENO, ": ", 2);
-       write(STDERR_FILENO, errstr, strlen(errstr));
-       write(STDERR_FILENO, "\n", 1);
-       exit(1);
-}
-
 int
 main(int argc, char *argv[])
 {
@@ -80,7 +63,6 @@ main(int argc, char *argv[])
        struct iovec *iov, *vp; /* Elements to write, current element. */
        char space[] = " ";
        char newline[] = "\n";
-       char *progname = argv[0];
 
        if (caph_limit_stdio() < 0 || caph_enter() < 0)
                err(1, "capsicum");
@@ -96,7 +78,7 @@ main(int argc, char *argv[])
        veclen = (argc >= 2) ? (argc - 2) * 2 + 1 : 0;
 
        if ((vp = iov = malloc((veclen + 1) * sizeof(struct iovec))) == NULL)
-               errexit(progname, "malloc");
+               err(1, "malloc");
 
        while (argv[0] != NULL) {
                size_t len;
@@ -135,7 +117,7 @@ main(int argc, char *argv[])
 
                nwrite = (veclen > IOV_MAX) ? IOV_MAX : veclen;
                if (writev(STDOUT_FILENO, iov, nwrite) == -1)
-                       errexit(progname, "write");
+                       err(1, "write");
                iov += nwrite;
                veclen -= nwrite;
        }

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