The branch stable/14 has been updated by des: URL: https://cgit.FreeBSD.org/src/commit/?id=b38b0be29bfdc4b7bf17a4e4ef952fe170fa7567
commit b38b0be29bfdc4b7bf17a4e4ef952fe170fa7567 Author: Dag-Erling Smørgrav <[email protected]> AuthorDate: 2026-06-23 15:20:22 +0000 Commit: Dag-Erling Smørgrav <[email protected]> CommitDate: 2026-07-07 07:07:56 +0000 ping: Flush stdout after printing initial status MFC after: 1 week Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D57765 (cherry picked from commit 141bb8579882f9d1f7e95351573e30f10689f4bf) ping: Don't mix stdio and direct writes POSIX does not allow mixing direct writes to STDOUT_FILENO with stdio operations on stdout like we do here. More importantly, it causes tests to fail randomly (or not-so-randomly after I added an fflush in a previous commit). MFC after: 1 week Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D57884 (cherry picked from commit 8bda488114f330d758e6741ff44882bb12b76c0d) --- sbin/ping/ping.c | 27 +++++++++++++++++---------- sbin/ping/ping6.c | 28 ++++++++++++++++++---------- 2 files changed, 35 insertions(+), 20 deletions(-) diff --git a/sbin/ping/ping.c b/sbin/ping/ping.c index 3b8663772e87..d3cef7c20470 100644 --- a/sbin/ping/ping.c +++ b/sbin/ping/ping.c @@ -841,7 +841,6 @@ ping(int argc, char *const *argv) sweepmin, sweepmax); else (void)printf(": %d data bytes\n", datalen); - } else { if (sweepmax) (void)printf("PING %s: (%d ... %d) data bytes\n", @@ -849,6 +848,7 @@ ping(int argc, char *const *argv) else (void)printf("PING %s: %d data bytes\n", hostname, datalen); } + (void)fflush(stdout); /* * Use sigaction() instead of signal() to get unambiguous semantics, @@ -994,8 +994,10 @@ ping(int argc, char *const *argv) (void)clock_gettime(CLOCK_MONOTONIC, &last); if (ntransmitted - nreceived - 1 > nmissedmax) { nmissedmax = ntransmitted - nreceived - 1; - if (options & F_MISSED) - (void)write(STDOUT_FILENO, &BBELL, 1); + if (options & F_MISSED) { + (void)putc(BBELL, stdout); + (void)fflush(stdout); + } } } } @@ -1089,8 +1091,10 @@ pinger(void) } ntransmitted++; sntransmitted++; - if (!(options & F_QUIET) && options & F_DOT) - (void)write(STDOUT_FILENO, &DOT[DOTidx++ % DOTlen], 1); + if (!(options & F_QUIET) && options & F_DOT) { + (void)putc(DOT[DOTidx++ % DOTlen], stdout); + (void)fflush(stdout); + } } /* @@ -1212,9 +1216,10 @@ pr_pack(char *buf, ssize_t cc, struct sockaddr_in *from, struct timespec *tv) return; } - if (options & F_DOT) - (void)write(STDOUT_FILENO, &BSPACE, 1); - else { + if (options & F_DOT) { + (void)putc(BSPACE, stdout); + (void)fflush(stdout); + } else { (void)printf("%zd bytes from %s: icmp_seq=%u", cc, pr_addr(from->sin_addr), seq); (void)printf(" ttl=%d", ip.ip_ttl); @@ -1222,8 +1227,10 @@ pr_pack(char *buf, ssize_t cc, struct sockaddr_in *from, struct timespec *tv) (void)printf(" time=%.3f ms", triptime); if (dupflag) (void)printf(" (DUP!)"); - if (options & F_AUDIBLE) - (void)write(STDOUT_FILENO, &BBELL, 1); + if (options & F_AUDIBLE) { + (void)putc(BBELL, stdout); + (void)fflush(stdout); + } if (options & F_MASK) { /* Just prentend this cast isn't ugly */ (void)printf(" mask=%s", diff --git a/sbin/ping/ping6.c b/sbin/ping/ping6.c index de2f34dd78db..406ea1875b9c 100644 --- a/sbin/ping/ping6.c +++ b/sbin/ping/ping6.c @@ -1124,6 +1124,7 @@ ping6(int argc, char *argv[]) (unsigned long)(pingerlen() - 8)); printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); + fflush(stdout); if (preload == 0) pinger(); @@ -1250,8 +1251,10 @@ ping6(int argc, char *argv[]) clock_gettime(CLOCK_MONOTONIC, &last); if (ntransmitted - nreceived - 1 > nmissedmax) { nmissedmax = ntransmitted - nreceived - 1; - if (options & F_MISSED) - (void)write(STDOUT_FILENO, &BBELL, 1); + if (options & F_MISSED) { + (void)putc(BBELL, stdout); + (void)fflush(stdout); + } } } } @@ -1427,8 +1430,10 @@ pinger(void) (void)printf("ping: wrote %s %d chars, ret=%d\n", hostname, cc, i); } - if (!(options & F_QUIET) && options & F_DOT) - (void)write(STDOUT_FILENO, &DOT[DOTidx++ % DOTlen], 1); + if (!(options & F_QUIET) && options & F_DOT) { + (void)putc(DOT[DOTidx++ % DOTlen], stdout); + (void)fflush(stdout); + } return(0); } @@ -1625,11 +1630,14 @@ pr_pack(u_char *buf, int cc, struct msghdr *mhdr) return; } - if (options & F_DOT) - (void)write(STDOUT_FILENO, &BSPACE, 1); - else { - if (options & F_AUDIBLE) - (void)write(STDOUT_FILENO, &BBELL, 1); + if (options & F_DOT) { + (void)putc(BSPACE, stdout); + (void)fflush(stdout); + } else { + if (options & F_AUDIBLE) { + (void)putc(BBELL, stdout); + (void)fflush(stdout); + } (void)printf("%d bytes from %s, icmp_seq=%u", cc, pr_addr(from, fromlen), seq); (void)printf(" hlim=%d", hoplim); @@ -1818,7 +1826,7 @@ pr_pack(u_char *buf, int cc, struct msghdr *mhdr) } if (!(options & F_DOT)) { - (void)putchar('\n'); + (void)putc('\n', stdout); if (options & F_VERBOSE) pr_exthdrs(mhdr); (void)fflush(stdout);
