diff options
Diffstat (limited to 'sys/fs/procfs/procfs_status.c')
| -rw-r--r-- | sys/fs/procfs/procfs_status.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/sys/fs/procfs/procfs_status.c b/sys/fs/procfs/procfs_status.c new file mode 100644 index 0000000..ee3380e --- /dev/null +++ b/sys/fs/procfs/procfs_status.c @@ -0,0 +1,229 @@ +/* + * Copyright (c) 1993 Jan-Simon Pendry + * Copyright (c) 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Jan-Simon Pendry. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)procfs_status.c 8.4 (Berkeley) 6/15/94 + * + * From: + * $FreeBSD$ + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/malloc.h> +#include <sys/proc.h> +#include <sys/jail.h> +#include <sys/vnode.h> +#include <sys/tty.h> +#include <sys/resourcevar.h> +#include <miscfs/procfs/procfs.h> + +#include <vm/vm.h> +#include <vm/pmap.h> +#include <vm/vm_param.h> +#include <sys/exec.h> + +int +procfs_dostatus(curp, p, pfs, uio) + struct proc *curp; + struct proc *p; + struct pfsnode *pfs; + struct uio *uio; +{ + struct session *sess; + struct tty *tp; + struct ucred *cr; + char *ps; + char *sep; + int pid, ppid, pgid, sid; + int i; + int xlen; + int error; + char psbuf[256]; /* XXX - conservative */ + + if (uio->uio_rw != UIO_READ) + return (EOPNOTSUPP); + + pid = p->p_pid; + ppid = p->p_pptr ? p->p_pptr->p_pid : 0, + pgid = p->p_pgrp->pg_id; + sess = p->p_pgrp->pg_session; + sid = sess->s_leader ? sess->s_leader->p_pid : 0; + +/* comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg + euid ruid rgid,egid,groups[1 .. NGROUPS] +*/ + ps = psbuf; + bcopy(p->p_comm, ps, MAXCOMLEN); + ps[MAXCOMLEN] = '\0'; + ps += strlen(ps); + ps += sprintf(ps, " %d %d %d %d ", pid, ppid, pgid, sid); + + if ((p->p_flag&P_CONTROLT) && (tp = sess->s_ttyp)) + ps += sprintf(ps, "%d,%d ", major(tp->t_dev), minor(tp->t_dev)); + else + ps += sprintf(ps, "%d,%d ", -1, -1); + + sep = ""; + if (sess->s_ttyvp) { + ps += sprintf(ps, "%sctty", sep); + sep = ","; + } + if (SESS_LEADER(p)) { + ps += sprintf(ps, "%ssldr", sep); + sep = ","; + } + if (*sep != ',') + ps += sprintf(ps, "noflags"); + + if (p->p_flag & P_INMEM) { + struct timeval ut, st; + + calcru(p, &ut, &st, (struct timeval *) NULL); + ps += sprintf(ps, " %ld,%ld %ld,%ld %ld,%ld", + p->p_stats->p_start.tv_sec, + p->p_stats->p_start.tv_usec, + ut.tv_sec, ut.tv_usec, + st.tv_sec, st.tv_usec); + } else + ps += sprintf(ps, " -1,-1 -1,-1 -1,-1"); + + ps += sprintf(ps, " %s", + (p->p_wchan && p->p_wmesg) ? p->p_wmesg : "nochan"); + + cr = p->p_ucred; + + ps += sprintf(ps, " %lu %lu %lu", + (u_long)cr->cr_uid, + (u_long)p->p_cred->p_ruid, + (u_long)p->p_cred->p_rgid); + + /* egid (p->p_cred->p_svgid) is equal to cr_ngroups[0] + see also getegid(2) in /sys/kern/kern_prot.c */ + + for (i = 0; i < cr->cr_ngroups; i++) + ps += sprintf(ps, ",%lu", (u_long)cr->cr_groups[i]); + + if (p->p_prison) + ps += sprintf(ps, " %s", p->p_prison->pr_host); + else + ps += sprintf(ps, " -"); + ps += sprintf(ps, "\n"); + + xlen = ps - psbuf; + xlen -= uio->uio_offset; + ps = psbuf + uio->uio_offset; + xlen = imin(xlen, uio->uio_resid); + if (xlen <= 0) + error = 0; + else + error = uiomove(ps, xlen, uio); + + return (error); +} + +int +procfs_docmdline(curp, p, pfs, uio) + struct proc *curp; + struct proc *p; + struct pfsnode *pfs; + struct uio *uio; +{ + char *ps; + int xlen; + int error; + char *buf, *bp; + int buflen; + struct ps_strings pstr; + int i; + size_t bytes_left, done; + + if (uio->uio_rw != UIO_READ) + return (EOPNOTSUPP); + + /* + * If we are using the ps/cmdline caching, use that. Otherwise + * revert back to the old way which only implements full cmdline + * for the currept process and just p->p_comm for all other + * processes. + * Note that if the argv is no longer available, we deliberately + * don't fall back on p->p_comm or return an error: the authentic + * Linux behaviour is to return zero-length in this case. + */ + + if (p->p_args && (ps_argsopen ||!p_trespass(curp, p))) { + bp = p->p_args->ar_args; + buflen = p->p_args->ar_length; + buf = 0; + } else if (p != curp) { + bp = p->p_comm; + buflen = MAXCOMLEN; + buf = 0; + } else { + buflen = 256; + MALLOC(buf, char *, buflen + 1, M_TEMP, M_WAITOK); + bp = buf; + ps = buf; + error = copyin((void*)PS_STRINGS, &pstr, sizeof(pstr)); + if (error) { + FREE(buf, M_TEMP); + return (error); + } + bytes_left = buflen; + for (i = 0; bytes_left && (i < pstr.ps_nargvstr); i++) { + error = copyinstr(pstr.ps_argvstr[i], ps, + bytes_left, &done); + /* If too long or malformed, just truncate */ + if (error) { + error = 0; + break; + } + ps += done; + bytes_left -= done; + } + buflen = ps - buf; + } + + buflen -= uio->uio_offset; + ps = bp + uio->uio_offset; + xlen = min(buflen, uio->uio_resid); + if (xlen <= 0) + error = 0; + else + error = uiomove(ps, xlen, uio); + if (buf) + FREE(buf, M_TEMP); + return (error); +} |
