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Compare kernel dump header magic with textdump magic using strncmp()

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rather than the memcmp() which is used for regular dumps: the
textdump string is one character shorter, so we need to stop
comparing at the end of the string.

Use independent version checking logic for architecture-specific
version number vs. textdump version number, as the version sequences
may (someday) differ.

Run into by:	rrs
This commit is contained in:
Robert Watson 2007-12-27 21:28:48 +00:00
parent 98e4f2e2bf
commit df0b82f150
1 changed files with 31 additions and 11 deletions
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42
sbin/savecore/savecore.c
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@ -419,12 +419,32 @@ DoFile(const char *savedir, const char *device)
goto closefd;
}
istextdump = 0;
if (memcmp(kdhl.magic, TEXTDUMPMAGIC, sizeof kdhl.magic)) {
if (strncmp(kdhl.magic, TEXTDUMPMAGIC, sizeof kdhl) == 0) {
if (verbose)
printf("textdump magic on last dump header on %s\n",
device);
istextdump = 1;
} else if (memcmp(kdhl.magic, KERNELDUMPMAGIC, sizeof kdhl.magic)) {
if (dtoh32(kdhl.version) != KERNELDUMP_TEXT_VERSION) {
syslog(LOG_ERR,
"unknown version (%d) in last dump header on %s",
dtoh32(kdhl.version), device);
status = STATUS_BAD;
if (force == 0)
goto closefd;
}
} else if (memcmp(kdhl.magic, KERNELDUMPMAGIC, sizeof kdhl.magic) ==
0) {
if (dtoh32(kdhl.version) != KERNELDUMPVERSION) {
syslog(LOG_ERR,
"unknown version (%d) in last dump header on %s",
dtoh32(kdhl.version), device);
status = STATUS_BAD;
if (force == 0)
goto closefd;
}
} else {
if (verbose)
printf("magic mismatch on last dump header on %s\n",
device);
@ -443,15 +463,15 @@ DoFile(const char *savedir, const char *device)
syslog(LOG_ERR, "unable to force dump - bad magic");
goto closefd;
}
}
if (dtoh32(kdhl.version) != KERNELDUMPVERSION) {
syslog(LOG_ERR,
"unknown version (%d) in last dump header on %s",
dtoh32(kdhl.version), device);
status = STATUS_BAD;
if (force == 0)
goto closefd;
if (dtoh32(kdhl.version) != KERNELDUMPVERSION) {
syslog(LOG_ERR,
"unknown version (%d) in last dump header on %s",
dtoh32(kdhl.version), device);
status = STATUS_BAD;
if (force == 0)
goto closefd;
}
}
nfound++;