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Fix dumpon compatibility with dumpdev kenv

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The dumpdev kenv supports devices without the /dev/ prefix, fix dumpon to
also support this which is required after r288153.

MFC after:	1 week
Sponsored by:	Multiplay
This commit is contained in:
Steven Hartland 2015-11-23 14:06:21 +00:00
parent 477f6d2e17
commit 45a9027de4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=291207
1 changed files with 19 additions and 4 deletions
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23
sbin/dumpon/dumpon.c
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@ -152,16 +152,31 @@ main(int argc, char *argv[])
usage();
if (strcmp(argv[0], "off") != 0) {
fd = open(argv[0], O_RDONLY);
char tmp[PATH_MAX];
char *dumpdev;
if (strncmp(argv[0], _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) {
dumpdev = argv[0];
} else {
i = snprintf(tmp, PATH_MAX, "%s%s", _PATH_DEV, argv[0]);
if (i < 0) {
err(EX_OSERR, "%s", argv[0]);
} else if (i >= PATH_MAX) {
errno = EINVAL;
err(EX_DATAERR, "%s", argv[0]);
}
dumpdev = tmp;
}
fd = open(dumpdev, O_RDONLY);
if (fd < 0)
err(EX_OSFILE, "%s", argv[0]);
check_size(fd, argv[0]);
err(EX_OSFILE, "%s", dumpdev);
check_size(fd, dumpdev);
u = 0;
i = ioctl(fd, DIOCSKERNELDUMP, &u);
u = 1;
i = ioctl(fd, DIOCSKERNELDUMP, &u);
if (i == 0 && verbose)
printf("kernel dumps on %s\n", argv[0]);
printf("kernel dumps on %s\n", dumpdev);
} else {
fd = open(_PATH_DEVNULL, O_RDONLY);
if (fd < 0)