Date: Thu, 21 Jun 2012 03:40:32 GMT From: Shinji KOBAYASHI <skoba@moss.gr.jp> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/169282: utimes does not update st_mtim.tv_nsec when utimes(file, NULL) Message-ID: <201206210340.q5L3eWPn081664@red.freebsd.org> Resent-Message-ID: <201206210350.q5L3o9Dg088106@freefall.freebsd.org>
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>Number: 169282 >Category: kern >Synopsis: utimes does not update st_mtim.tv_nsec when utimes(file, NULL) >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Jun 21 03:50:09 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Shinji KOBAYASHI >Release: FreeBSD 9.0-STABLE >Organization: Ehime University >Environment: FreeBSD shuttle 9.0-STABLE FreeBSD 9.0-STABLE #28: Sat Jun 16 15:11:09 JST 2012 skoba@shuttle:/usr/obj/usr/src/sys/shuttle amd64 >Description: man utimes 2 shows that utimes(file, NULL) updates file modified time to current time. But the sample code shows tv_mtim.tv_nsec equals 0, after utimes(file, NULL). filetest.c ---- include <sys/time.h> #include <sys/stat.h> #include <stdio.h> #include <unistd.h> int main(void) { char *name; struct stat filestatus; int fd; int second; int nanosecond; name = "t.log"; fd = creat(name, 0666); fstat(fd, &filestatus); second = filestatus.st_mtim.tv_sec; nanosecond = filestatus.st_mtim.tv_nsec; printf("File created time %d sec,%d nsec\n", second, nanosecond); usleep(1000100); utimes(name, NULL); fstat(fd, &filestatus); printf("File modified time %d sec, %dnsec\n", filestatus.st_mtim.tv_sec, filestatus.st_mtim.tv_nsec); usleep(1000100); creat(name); fstat(fd, &filestatus); printf("File modified time %d sec, %dnsec\n", filestatus.st_mtim.tv_sec, filestatus.st_mtim.tv_nsec); return 0; } --- The result: shuttle% ./filetest ~/src File created time 1340243920 sec,662186384 nsec File modified time 1340243921 sec, 0nsec File modified time 1340243922 sec, 666190831nsec >How-To-Repeat: filetest.c ---- include <sys/time.h> #include <sys/stat.h> #include <stdio.h> #include <unistd.h> int main(void) { char *name; struct stat filestatus; int fd; int second; int nanosecond; name = "t.log"; fd = creat(name, 0666); fstat(fd, &filestatus); second = filestatus.st_mtim.tv_sec; nanosecond = filestatus.st_mtim.tv_nsec; printf("File created time %d sec,%d nsec\n", second, nanosecond); usleep(1000100); utimes(name, NULL); fstat(fd, &filestatus); printf("File modified time %d sec, %dnsec\n", filestatus.st_mtim.tv_sec, filestatus.st_mtim.tv_nsec); usleep(1000100); creat(name); fstat(fd, &filestatus); printf("File modified time %d sec, %dnsec\n", filestatus.st_mtim.tv_sec, filestatus.st_mtim.tv_nsec); return 0; } --- The result: shuttle% cc -o filetest filetest.c shuttle% ./filetest ~/src File created time 1340243920 sec,662186384 nsec File modified time 1340243921 sec, 0nsec File modified time 1340243922 sec, 666190831nsec >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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