2 * Copyright (c) 2003 Kip Macy
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/types.h>
28 #include <sys/param.h>
30 #include <sys/module.h>
31 #include <sys/sysent.h>
32 #include <sys/kernel.h>
33 #include <sys/systm.h>
34 #include <sys/nlookup.h>
37 #include <sys/fcntl.h>
38 #include <sys/signal.h>
39 #include <vm/vm_param.h>
41 #include <sys/imgact_elf.h>
42 #include <sys/procfs.h>
46 #include <vm/vm_map.h>
47 #include <vm/vm_extern.h>
49 #include <sys/sysproto.h>
50 #include <sys/resource.h>
51 #include <sys/resourcevar.h>
52 #include <sys/malloc.h>
55 #include <sys/namei.h>
56 #include <sys/vnode.h>
57 #include <machine/inttypes.h>
58 #include <machine/limits.h>
59 #include <machine/frame.h>
60 #include <sys/signalvar.h>
61 #include <sys/syslog.h>
62 #include <sys/sysctl.h>
63 #include <machine/sigframe.h>
65 #include <sys/unistd.h>
67 #include <sys/kern_syscall.h>
68 #include <sys/checkpoint.h>
69 #include <sys/mount.h>
72 #include <sys/mplock2.h>
73 #include <sys/file2.h>
75 static int elf_loadphdrs(struct file *fp, Elf_Phdr *phdr, int numsegs);
76 static int elf_getnotes(struct lwp *lp, struct file *fp, size_t notesz);
77 static int elf_demarshalnotes(void *src, prpsinfo_t *psinfo,
78 prstatus_t *status, prfpregset_t *fpregset, int nthreads);
79 static int elf_loadnotes(struct lwp *, prpsinfo_t *, prstatus_t *,
81 static int elf_getsigs(struct lwp *lp, struct file *fp);
82 static int elf_getfiles(struct lwp *lp, struct file *fp);
83 static int elf_gettextvp(struct proc *p, struct file *fp);
84 static char *ckpt_expand_name(const char *name, uid_t uid, pid_t pid);
86 static int ckptgroup = 0; /* wheel only, -1 for any group */
87 SYSCTL_INT(_kern, OID_AUTO, ckptgroup, CTLFLAG_RW, &ckptgroup, 0, "");
89 /* ref count to see how many processes that are being checkpointed */
90 static int chptinuse = 0;
94 read_check(struct file *fp, void *buf, size_t nbyte)
99 PRINTF(("reading %zd bytes\n", nbyte));
100 error = fp_read(fp, buf, nbyte, &nread, 1, UIO_SYSSPACE);
102 PRINTF(("read failed - %d", error));
103 } else if (nread != nbyte) {
104 PRINTF(("wanted to read %zd - read %zd\n", nbyte, nread));
111 elf_gethdr(struct file *fp, Elf_Ehdr *ehdr)
113 size_t nbyte = sizeof(Elf_Ehdr);
116 if ((error = read_check(fp, ehdr, nbyte)) != 0)
118 if (!(ehdr->e_ehsize == sizeof(Elf_Ehdr))) {
119 PRINTF(("wrong elf header size: %d\n"
120 "expected size : %zd\n",
121 ehdr->e_ehsize, sizeof(Elf_Ehdr)));
124 if (!(ehdr->e_phentsize == sizeof(Elf_Phdr))) {
125 PRINTF(("wrong program header size: %d\n"
126 "expected size : %zd\n",
127 ehdr->e_phentsize, sizeof(Elf_Phdr)));
131 if (!(ehdr->e_ident[EI_MAG0] == ELFMAG0 &&
132 ehdr->e_ident[EI_MAG1] == ELFMAG1 &&
133 ehdr->e_ident[EI_MAG2] == ELFMAG2 &&
134 ehdr->e_ident[EI_MAG3] == ELFMAG3 &&
135 ehdr->e_ident[EI_CLASS] == ELF_CLASS &&
136 ehdr->e_ident[EI_DATA] == ELF_DATA &&
137 ehdr->e_ident[EI_VERSION] == EV_CURRENT &&
138 ehdr->e_ident[EI_OSABI] == ELFOSABI_NONE &&
139 ehdr->e_ident[EI_ABIVERSION] == 0)) {
140 PRINTF(("bad elf header\n there are %d segments\n",
145 PRINTF(("Elf header size: %d\n", ehdr->e_ehsize));
146 PRINTF(("Program header size: %d\n", ehdr->e_phentsize));
147 PRINTF(("Number of Program headers: %d\n", ehdr->e_phnum));
153 elf_getphdrs(struct file *fp, Elf_Phdr *phdr, size_t nbyte)
157 int nheaders = nbyte/sizeof(Elf_Phdr);
159 PRINTF(("reading phdrs section\n"));
160 if ((error = read_check(fp, phdr, nbyte)) != 0)
162 PRINTF(("headers section:\n"));
163 for (i = 0; i < nheaders; i++) {
164 PRINTF(("entry type: %d\n", phdr[i].p_type));
165 PRINTF(("file offset: %jd\n", (intmax_t)phdr[i].p_offset));
166 PRINTF(("virt address: %p\n", (uint32_t *)phdr[i].p_vaddr));
167 PRINTF(("file size: %jd\n", (intmax_t)phdr[i].p_filesz));
168 PRINTF(("memory size: %jd\n", (intmax_t)phdr[i].p_memsz));
177 elf_getnotes(struct lwp *lp, struct file *fp, size_t notesz)
184 prfpregset_t *fpregset;
186 nthreads = (notesz - sizeof(prpsinfo_t))/(sizeof(prstatus_t) +
187 sizeof(prfpregset_t));
188 PRINTF(("reading notes header nthreads=%d\n", nthreads));
189 if (nthreads <= 0 || nthreads > CKPT_MAXTHREADS)
192 psinfo = kmalloc(sizeof(prpsinfo_t), M_TEMP, M_ZERO | M_WAITOK);
193 status = kmalloc(nthreads*sizeof(prstatus_t), M_TEMP, M_WAITOK);
194 fpregset = kmalloc(nthreads*sizeof(prfpregset_t), M_TEMP, M_WAITOK);
195 note = kmalloc(notesz, M_TEMP, M_WAITOK);
198 PRINTF(("reading notes section\n"));
199 if ((error = read_check(fp, note, notesz)) != 0)
201 error = elf_demarshalnotes(note, psinfo, status, fpregset, nthreads);
204 /* fetch register state from notes */
205 error = elf_loadnotes(lp, psinfo, status, fpregset);
208 kfree(psinfo, M_TEMP);
210 kfree(status, M_TEMP);
212 kfree(fpregset, M_TEMP);
219 ckpt_thaw_proc(struct lwp *lp, struct file *fp)
221 struct proc *p = lp->lwp_proc;
222 Elf_Phdr *phdr = NULL;
223 Elf_Ehdr *ehdr = NULL;
229 ehdr = kmalloc(sizeof(Elf_Ehdr), M_TEMP, M_ZERO | M_WAITOK);
231 if ((error = elf_gethdr(fp, ehdr)) != 0)
233 nbyte = sizeof(Elf_Phdr) * ehdr->e_phnum;
234 phdr = kmalloc(nbyte, M_TEMP, M_WAITOK);
236 /* fetch description of program writable mappings */
237 if ((error = elf_getphdrs(fp, phdr, nbyte)) != 0)
240 /* fetch notes section containing register state */
241 if ((error = elf_getnotes(lp, fp, phdr->p_filesz)) != 0)
244 /* fetch program text vnodes */
245 if ((error = elf_gettextvp(p, fp)) != 0)
248 /* fetch signal disposition */
249 if ((error = elf_getsigs(lp, fp)) != 0) {
250 kprintf("failure in recovering signals\n");
254 /* fetch open files */
255 if ((error = elf_getfiles(lp, fp)) != 0)
258 /* handle mappings last in case we are reading from a socket */
259 error = elf_loadphdrs(fp, phdr, ehdr->e_phnum);
262 * Set the textvp to the checkpoint file and mark the vnode so
263 * a future checkpointing of this checkpoint-restored program
264 * will copy out the contents of the mappings rather then trying
265 * to record the vnode info related to the checkpoint file, which
266 * is likely going to be destroyed when the program is re-checkpointed.
268 if (error == 0 && fp->f_data && fp->f_type == DTYPE_VNODE) {
271 p->p_textvp = (struct vnode *)fp->f_data;
272 vsetflags(p->p_textvp, VCKPT);
285 elf_loadnotes(struct lwp *lp, prpsinfo_t *psinfo, prstatus_t *status,
286 prfpregset_t *fpregset)
288 struct proc *p = lp->lwp_proc;
291 /* validate status and psinfo */
293 if (status->pr_version != PRSTATUS_VERSION ||
294 status->pr_statussz != sizeof(prstatus_t) ||
295 status->pr_gregsetsz != sizeof(gregset_t) ||
296 status->pr_fpregsetsz != sizeof(fpregset_t) ||
297 psinfo->pr_version != PRPSINFO_VERSION ||
298 psinfo->pr_psinfosz != sizeof(prpsinfo_t)) {
299 PRINTF(("status check failed\n"));
303 /* XXX lwp handle more than one lwp*/
304 if ((error = set_regs(lp, &status->pr_reg)) != 0)
306 error = set_fpregs(lp, fpregset);
307 strlcpy(p->p_comm, psinfo->pr_fname, sizeof(p->p_comm));
308 /* XXX psinfo->pr_psargs not yet implemented */
315 elf_getnote(void *src, size_t *off, const char *name, unsigned int type,
316 void **desc, size_t descsz)
326 bcopy((char *)src + *off, ¬e, sizeof note);
328 PRINTF(("at offset: %zd expected note of type: %d - got: %d\n",
329 *off, type, note.n_type));
331 if (type != note.n_type) {
336 if (strncmp(name, (char *) src + *off, note.n_namesz) != 0) {
340 *off += roundup2(note.n_namesz, sizeof(Elf_Size));
341 if (note.n_descsz != descsz) {
347 bcopy((char *)src + *off, *desc, note.n_descsz);
348 *off += roundup2(note.n_descsz, sizeof(Elf_Size));
356 elf_demarshalnotes(void *src, prpsinfo_t *psinfo, prstatus_t *status,
357 prfpregset_t *fpregset, int nthreads)
364 error = elf_getnote(src, &off, "CORE", NT_PRPSINFO,
365 (void **)&psinfo, sizeof(prpsinfo_t));
368 error = elf_getnote(src, &off, "CORE", NT_PRSTATUS,
369 (void **)&status, sizeof(prstatus_t));
372 error = elf_getnote(src, &off, "CORE", NT_FPREGSET,
373 (void **)&fpregset, sizeof(prfpregset_t));
378 * The remaining portion needs to be an integer multiple
379 * of prstatus_t and prfpregset_t
381 for (i = 0 ; i < nthreads - 1; i++) {
382 status++; fpregset++;
383 error = elf_getnote(src, &off, "CORE", NT_PRSTATUS,
384 (void **)&status, sizeof (prstatus_t));
387 error = elf_getnote(src, &off, "CORE", NT_FPREGSET,
388 (void **)&fpregset, sizeof(prfpregset_t));
400 mmap_phdr(struct file *fp, Elf_Phdr *phdr)
410 pos = phdr->p_offset;
411 len = phdr->p_filesz;
412 addr = (void *)phdr->p_vaddr;
413 flags = MAP_FIXED | MAP_NOSYNC | MAP_PRIVATE;
415 if (phdr->p_flags & PF_R)
417 if (phdr->p_flags & PF_W)
419 if (phdr->p_flags & PF_X)
421 if ((error = fp_mmap(addr, len, prot, flags, fp, pos, &addr)) != 0) {
422 PRINTF(("mmap failed: %d\n", error); );
424 PRINTF(("map @%08"PRIxPTR"-%08"PRIxPTR" fileoff %08x-%08x\n", (uintptr_t)addr,
425 (uintptr_t)((char *)addr + len), (int)pos, (int)(pos + len)));
431 * Load memory mapped segments. The segments are backed by the checkpoint
435 elf_loadphdrs(struct file *fp, Elf_Phdr *phdr, int numsegs)
441 for (i = 1; i < numsegs; i++) {
442 if ((error = mmap_phdr(fp, &phdr[i])) != 0)
450 elf_getsigs(struct lwp *lp, struct file *fp)
452 struct proc *p = lp->lwp_proc;
454 struct ckpt_siginfo *csi;
457 csi = kmalloc(sizeof(struct ckpt_siginfo), M_TEMP, M_ZERO | M_WAITOK);
458 if ((error = read_check(fp, csi, sizeof(struct ckpt_siginfo))) != 0)
461 if (csi->csi_ckptpisz != sizeof(struct ckpt_siginfo)) {
466 bcopy(&csi->csi_sigacts, p->p_sigacts, sizeof(struct sigacts));
467 bcopy(&csi->csi_itimerval, &p->p_realtimer, sizeof(struct itimerval));
468 SIG_CANTMASK(csi->csi_sigmask);
469 /* XXX lwp handle more than one lwp */
470 bcopy(&csi->csi_sigmask, &lp->lwp_sigmask, sizeof(sigset_t));
471 p->p_sigparent = csi->csi_sigparent;
480 * Returns a locked, refd vnode
483 ckpt_fhtovp(fhandle_t *fh, struct vnode **vpp)
489 mp = vfs_getvfs(&fh->fh_fsid);
493 PRINTF(("failed to get mount - ESTALE\n"));
497 error = VFS_FHTOVP(mp, NULL, &fh->fh_fid, vpp);
500 PRINTF(("failed with: %d\n", error));
508 mmap_vp(struct vn_hdr *vnh)
516 phdr = &vnh->vnh_phdr;
518 if ((error = ckpt_fhtovp(&vnh->vnh_fh, &vp)) != 0)
521 * XXX O_RDONLY -> or O_RDWR if file is PROT_WRITE, MAP_SHARED
523 if ((error = fp_vpopen(vp, O_RDONLY, &fp)) != 0) {
527 error = mmap_phdr(fp, phdr);
535 elf_gettextvp(struct proc *p, struct file *fp)
540 struct ckpt_vminfo vminfo;
541 struct vn_hdr *vnh = NULL;
544 if ((error = read_check(fp, &vminfo, sizeof(vminfo))) != 0)
546 if (vminfo.cvm_dsize < 0 ||
547 vminfo.cvm_dsize > p->p_rlimit[RLIMIT_DATA].rlim_cur ||
548 vminfo.cvm_tsize < 0 ||
549 (u_quad_t)vminfo.cvm_tsize > maxtsiz ||
550 vminfo.cvm_daddr >= (caddr_t)VM_MAX_USER_ADDRESS ||
551 vminfo.cvm_taddr >= (caddr_t)VM_MAX_USER_ADDRESS
557 vmspace_exec(p, NULL);
558 p->p_vmspace->vm_daddr = vminfo.cvm_daddr;
559 p->p_vmspace->vm_dsize = ctob(vminfo.cvm_dsize); /* in bytes */
560 p->p_vmspace->vm_taddr = vminfo.cvm_taddr;
561 p->p_vmspace->vm_tsize = ctob(vminfo.cvm_tsize); /* in bytes */
562 if ((error = read_check(fp, &vpcount, sizeof(int))) != 0)
564 vnh = kmalloc(sizeof(struct vn_hdr) * vpcount, M_TEMP, M_WAITOK);
565 if ((error = read_check(fp, vnh, sizeof(struct vn_hdr)*vpcount)) != 0)
567 for (i = 0; i < vpcount; i++) {
568 if ((error = mmap_vp(&vnh[i])) != 0)
583 elf_getfiles(struct lwp *lp, struct file *fp)
589 struct ckpt_filehdr filehdr;
590 struct ckpt_fileinfo *cfi_base = NULL;
591 struct filedesc *fdp = lp->lwp_proc->p_fd;
597 if ((error = read_check(fp, &filehdr, sizeof(filehdr))) != 0)
599 filecount = filehdr.cfh_nfiles;
600 cfi_base = kmalloc(filecount*sizeof(struct ckpt_fileinfo), M_TEMP, M_WAITOK);
601 error = read_check(fp, cfi_base, filecount*sizeof(struct ckpt_fileinfo));
606 * Close all file descriptors >= 3. These descriptors are from the
607 * checkpt(1) program itself and should not be retained.
609 * XXX we need a flag so a checkpoint restore can opt to supply the
610 * descriptors, or the non-regular-file descripors.
612 for (i = 3; i < fdp->fd_nfiles; ++i)
618 for (i = 0; i < filecount; i++) {
619 struct ckpt_fileinfo *cfi= &cfi_base[i];
621 * Ignore placeholder entries where cfi_index is less then
622 * zero. This will occur if the elf core dump code thinks
623 * it can save a vnode but winds up not being able to.
625 if (cfi->cfi_index < 0)
629 * Restore a saved file descriptor. If CKFIF_ISCKPTFD is
630 * set the descriptor represents the checkpoint file itself,
631 * probably due to the user calling sys_checkpoint(). We
632 * want to use the fp being used to restore the checkpoint
633 * instead of trying to restore the original filehandle.
635 if (cfi->cfi_ckflags & CKFIF_ISCKPTFD) {
640 error = ckpt_fhtovp(&cfi->cfi_fh, &vp);
642 error = fp_vpopen(vp, OFLAGS(cfi->cfi_flags),
650 tempfp->f_offset = cfi->cfi_offset;
653 * If overwriting a descriptor close the old descriptor. This
654 * only occurs if the saved core saved descriptors that we
655 * have not already closed.
657 if (cfi->cfi_index < fdp->fd_nfiles &&
658 (ofp = fdp->fd_files[cfi->cfi_index].fp) != NULL) {
659 kern_close(cfi->cfi_index);
663 * Allocate the descriptor we want.
665 if (fdalloc(lp->lwp_proc, cfi->cfi_index, &fd) != 0) {
666 PRINTF(("can't currently restore fd: %d\n",
671 KKASSERT(fd == cfi->cfi_index);
672 fsetfd(fdp, tempfp, fd);
675 PRINTF(("restoring %d\n", cfi->cfi_index));
680 kfree(cfi_base, M_TEMP);
686 ckpt_freeze_proc(struct lwp *lp, struct file *fp)
688 struct proc *p = lp->lwp_proc;
692 lwkt_gettoken(&p->p_token); /* needed for proc_*() calls */
694 PRINTF(("calling generic_elf_coredump\n"));
695 limit = p->p_rlimit[RLIMIT_CORE].rlim_cur;
697 if (p->p_stat != SCORE) {
699 while (p->p_nstopped < p->p_nthreads - 1)
700 tsleep(&p->p_nstopped, 0, "freeze", 1);
701 error = generic_elf_coredump(lp, SIGCKPT, fp, limit);
702 proc_unstop(p, SCORE);
709 lwkt_reltoken(&p->p_token);
717 sys_sys_checkpoint(struct sys_checkpoint_args *uap)
720 struct thread *td = curthread;
721 struct proc *p = td->td_proc;
725 * Only certain groups (to reduce our security exposure). -1
728 if (ckptgroup >= 0 && groupmember(ckptgroup, td->td_ucred) == 0)
732 * For now we can only checkpoint the current process
734 if (uap->pid != -1 && uap->pid != p->p_pid)
742 if (uap->fd == -1 && uap->pid == (pid_t)-1)
743 error = checkpoint_signal_handler(td->td_lwp);
744 else if ((fp = holdfp(td, uap->fd, FWRITE)) == NULL)
747 error = ckpt_freeze_proc(td->td_lwp, fp);
749 dropfp(td, uap->fd, fp);
752 if (uap->pid != -1) {
756 if ((fp = holdfp(td, uap->fd, FREAD)) == NULL) {
760 uap->sysmsg_result = uap->retval;
761 error = ckpt_thaw_proc(td->td_lwp, fp);
762 dropfp(td, uap->fd, fp);
773 checkpoint_signal_handler(struct lwp *lp)
775 struct thread *td = lp->lwp_thread;
776 struct proc *p = lp->lwp_proc;
779 struct nlookupdata nd;
785 * Being able to checkpoint an suid or sgid program is not a good
788 if (sugid_coredump == 0 && (p->p_flags & P_SUGID)) {
793 buf = ckpt_expand_name(p->p_comm, td->td_ucred->cr_uid, p->p_pid);
799 log(LOG_INFO, "pid %d (%s), uid %d: checkpointing to %s\n",
801 (td->td_ucred ? td->td_ucred->cr_uid : -1),
804 PRINTF(("ckpt handler called, using '%s'\n", buf));
807 * Use the same safety flags that the coredump code uses. Remove
808 * any previous checkpoint file before writing out the new one in
809 * case we are re-checkpointing a program that had been checkpt
810 * restored. Otherwise we will corrupt the program space (which is
811 * made up of mmap()ings of the previous checkpoint file) while we
812 * write out the new one.
814 error = nlookup_init(&nd, buf, UIO_SYSSPACE, 0);
816 error = kern_unlink(&nd);
818 error = fp_open(buf, O_WRONLY|O_CREAT|O_TRUNC|O_NOFOLLOW, 0600, &fp);
820 error = ckpt_freeze_proc(lp, fp);
823 kprintf("checkpoint failed with open - error: %d\n", error);
830 static char ckptfilename[MAXPATHLEN] = {"%N.ckpt"};
831 SYSCTL_STRING(_kern, OID_AUTO, ckptfile, CTLFLAG_RW, ckptfilename,
832 sizeof(ckptfilename), "process checkpoint name format string");
835 * expand_name(name, uid, pid)
836 * Expand the name described in corefilename, using name, uid, and pid.
837 * corefilename is a kprintf-like string, with three format specifiers:
838 * %N name of process ("name")
839 * %P process id (pid)
841 * For example, "%N.core" is the default; they can be disabled completely
842 * by using "/dev/null", or all core files can be stored in "/cores/%U/%N-%P".
843 * This is controlled by the sysctl variable kern.corefile (see above).
845 * -- taken from the coredump code
850 ckpt_expand_name(const char *name, uid_t uid, pid_t pid)
854 char buf[11]; /* Buffer for pid/uid -- max 4B */
858 char *format = ckptfilename;
861 temp = kmalloc(MAXPATHLEN + 1, M_TEMP, M_NOWAIT);
864 namelen = strlen(name);
866 if (ckptfilename[0] != '/') {
867 if ((bp = kern_getcwd(temp, MAXPATHLEN - 1, &error)) == NULL) {
872 bcopy(bp, temp, n + 1); /* normalize location of the path */
876 for (i= 0; n < MAXPATHLEN && format[i]; i++) {
879 case '%': /* Format character */
885 case 'N': /* process name */
886 if ((n + namelen) > MAXPATHLEN) {
887 log(LOG_ERR, "pid %d (%s), uid (%u): Path `%s%s' is too long\n",
888 pid, name, uid, temp, name);
892 memcpy(temp+n, name, namelen);
895 case 'P': /* process id */
896 l = ksprintf(buf, "%u", pid);
897 if ((n + l) > MAXPATHLEN) {
898 log(LOG_ERR, "pid %d (%s), uid (%u): Path `%s%s' is too long\n",
899 pid, name, uid, temp, name);
903 memcpy(temp+n, buf, l);
906 case 'U': /* user id */
907 l = ksprintf(buf, "%u", uid);
908 if ((n + l) > MAXPATHLEN) {
909 log(LOG_ERR, "pid %d (%s), uid (%u): Path `%s%s' is too long\n",
910 pid, name, uid, temp, name);
914 memcpy(temp+n, buf, l);
918 log(LOG_ERR, "Unknown format character %c in `%s'\n", format[i], format);
922 temp[n++] = format[i];