84d41c5e6d
Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Warner Losh <imp@bsdimp.com> Message-Id: <20230925182425.3163-20-kariem.taha2.7@gmail.com>
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/*
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* FreeBSD process related emulation code
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*
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* Copyright (c) 2013-15 Stacey D. Son
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/sysctl.h>
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struct kinfo_proc;
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#include <libprocstat.h>
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#include "qemu.h"
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/*
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* Get the filename for the given file descriptor.
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* Note that this may return NULL (fail) if no longer cached in the kernel.
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*/
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char *
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get_filename_from_fd(pid_t pid, int fd, char *filename, size_t len);
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char *
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get_filename_from_fd(pid_t pid, int fd, char *filename, size_t len)
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{
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char *ret = NULL;
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unsigned int cnt;
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struct procstat *procstat = NULL;
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struct kinfo_proc *kp = NULL;
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struct filestat_list *head = NULL;
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struct filestat *fst;
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procstat = procstat_open_sysctl();
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if (procstat == NULL) {
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goto out;
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}
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kp = procstat_getprocs(procstat, KERN_PROC_PID, pid, &cnt);
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if (kp == NULL) {
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goto out;
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}
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head = procstat_getfiles(procstat, kp, 0);
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if (head == NULL) {
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goto out;
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}
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STAILQ_FOREACH(fst, head, next) {
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if (fd == fst->fs_fd) {
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if (fst->fs_path != NULL) {
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(void)strlcpy(filename, fst->fs_path, len);
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ret = filename;
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}
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break;
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}
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}
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out:
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if (head != NULL) {
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procstat_freefiles(procstat, head);
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}
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if (kp != NULL) {
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procstat_freeprocs(procstat, kp);
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}
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if (procstat != NULL) {
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procstat_close(procstat);
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}
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return ret;
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}
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