* Switch from doing compress(1)ed crashdumps with the -z flag to using
gzip(1). gdb doesn't understand these, but then again it didn't understand compressed crashdumps either. * Change a stray lseek() into a Lseek() * Remove the extraneous prototype for log() which has apparently never existed in FreeBSD's sources Obtained from: NetBSD (partially) MFC after: 2 weeks
This commit is contained in:
kris
parent
ef56905cb0
commit
3633cc3a37
@ -2,11 +2,10 @@
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# $FreeBSD$
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PROG= savecore
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SRCS= savecore.c zopen.c
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SRCS= savecore.c
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MAN= savecore.8
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ZOPENPATH= ${.CURDIR}/../../usr.bin/compress
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.PATH: ${ZOPENPATH}
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CFLAGS+= -I${ZOPENPATH}
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DPADD+= ${LIBZ}
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LDADD+= -lz
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.include <bsd.prog.mk>
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@ -72,7 +72,7 @@ as the kernel instead of the running kernel (as determined from
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Print out some additional debugging information.
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.It Fl z
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Compress the core dump and kernel (see
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.Xr compress 1 ) .
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.Xr gzip 1 ) .
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.El
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.Pp
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.Nm Savecore
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@ -113,8 +113,8 @@ is meant to be called near the end of the initialization file
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.Sh BUGS
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The minfree code does not consider the effect of compression.
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.Sh SEE ALSO
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.Xr compress 1 ,
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.Xr getbootfile 3 ,
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.Xr gzip 1 ,
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.Xr syslogd 8
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.Sh HISTORY
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The
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@ -63,7 +63,8 @@ static const char rcsid[] =
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "zopen.h"
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extern FILE *zopen(const char *fname, const char *mode);
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#ifdef __alpha__
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#define ok(number) ALPHA_K0SEG_TO_PHYS(number)
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@ -138,7 +139,6 @@ void find_dev __P((dev_t));
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int get_crashtime __P((void));
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void get_dumpsize __P((void));
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void kmem_setup __P((void));
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void log __P((int, char *, ...)) __printflike(2, 3);
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void Lseek __P((int, off_t, int));
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int Open __P((const char *, int rw));
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int Read __P((int, void *, int));
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@ -289,7 +289,7 @@ kmem_setup()
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if (kernel)
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return;
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lseek(kmem, (off_t)current_nl[X_VERSION].n_value, SEEK_SET);
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Lseek(kmem, (off_t)current_nl[X_VERSION].n_value, SEEK_SET);
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Read(kmem, vers, sizeof(vers));
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vers[sizeof(vers) - 1] = '\0';
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p = strchr(vers, '\n');
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@ -398,9 +398,9 @@ err1: syslog(LOG_WARNING, "%s: %m", path);
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/* Create the core file. */
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oumask = umask(S_IRWXG|S_IRWXO); /* Restrict access to the core file.*/
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(void)snprintf(path, sizeof(path), "%s/vmcore.%d%s",
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savedir, bounds, compress ? ".Z" : "");
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savedir, bounds, compress ? ".gz" : "");
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if (compress)
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fp = zopen(path, "w", 0);
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fp = zopen(path, "w");
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else
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fp = fopen(path, "w");
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if (fp == NULL) {
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@ -427,41 +427,45 @@ err1: syslog(LOG_WARNING, "%s: %m", path);
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syslog(LOG_ERR, "%s: %m", ddname);
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goto err2;
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}
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for (nw = 0; nw < nr; nw = he) {
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/* find a contiguous block of zeroes */
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for (hs = nw; hs < nr; hs += BLOCKSIZE) {
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for (he = hs; he < nr && buf[he] == 0; ++he)
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/* nothing */ ;
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if (compress) {
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nw = fwrite(buf, 1, nr, fp);
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} else {
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for (nw = 0; nw < nr; nw = he) {
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/* find a contiguous block of zeroes */
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for (hs = nw; hs < nr; hs += BLOCKSIZE) {
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for (he = hs; he < nr && buf[he] == 0; ++he)
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/* nothing */ ;
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/* is the hole long enough to matter? */
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if (he >= hs + BLOCKSIZE)
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break;
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}
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break;
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}
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/* back down to a block boundary */
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he &= BLOCKMASK;
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/* back down to a block boundary */
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he &= BLOCKMASK;
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/*
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* 1) Don't go beyond the end of the buffer.
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* 2) If the end of the buffer is less than
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* BLOCKSIZE bytes away, we're at the end
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* of the file, so just grab what's left.
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*/
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if (hs + BLOCKSIZE > nr)
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/*
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* 1) Don't go beyond the end of the buffer.
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* 2) If the end of the buffer is less than
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* BLOCKSIZE bytes away, we're at the end
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* of the file, so just grab what's left.
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*/
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if (hs + BLOCKSIZE > nr)
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hs = he = nr;
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/*
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* At this point, we have a partial ordering:
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* nw <= hs <= he <= nr
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* If hs > nw, buf[nw..hs] contains non-zero data.
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* If he > hs, buf[hs..he] is all zeroes.
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*/
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if (hs > nw)
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/*
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* At this point, we have a partial ordering:
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* nw <= hs <= he <= nr
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* If hs > nw, buf[nw..hs] contains non-zero data.
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* If he > hs, buf[hs..he] is all zeroes.
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*/
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if (hs > nw)
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if (fwrite(buf + nw, hs - nw, 1, fp) != 1)
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break;
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if (he > hs)
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break;
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if (he > hs)
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if (fseek(fp, he - hs, SEEK_CUR) == -1)
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break;
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break;
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}
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}
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if (nw != nr) {
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syslog(LOG_ERR, "%s: %m", path);
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@ -477,9 +481,9 @@ err2: syslog(LOG_WARNING,
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/* Copy the kernel. */
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ifd = Open(kernel ? kernel : getbootfile(), O_RDONLY);
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(void)snprintf(path, sizeof(path), "%s/kernel.%d%s",
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savedir, bounds, compress ? ".Z" : "");
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savedir, bounds, compress ? ".gz" : "");
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if (compress)
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fp = zopen(path, "w", 0);
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fp = zopen(path, "w");
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else
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fp = fopen(path, "w");
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if (fp == NULL) {
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