8d2393a033
This fixes the bug: when procstat -xa was run and the sysctl for a process returned ESRCH or EPERM, for this process procstat output the result collected for the previous successful process.
245 lines
6.0 KiB
C
245 lines
6.0 KiB
C
/*-
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* Copyright (c) 2011 Mikolaj Golub
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/elf.h>
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#include <sys/sysctl.h>
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#include <sys/user.h>
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#include <vm/vm.h>
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#include <err.h>
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#include <errno.h>
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#include <libprocstat.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "procstat.h"
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#define PROC_AUXV_MAX 256
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static Elf_Auxinfo auxv[PROC_AUXV_MAX];
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static char prefix[256];
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#if __ELF_WORD_SIZE == 64
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static Elf32_Auxinfo auxv32[PROC_AUXV_MAX];
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static const char *elf32_sv_names[] = {
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"Linux ELF32",
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"FreeBSD ELF32",
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};
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static int
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is_elf32(pid_t pid)
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{
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int error, name[4];
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size_t len, i;
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static char sv_name[256];
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name[0] = CTL_KERN;
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name[1] = KERN_PROC;
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name[2] = KERN_PROC_SV_NAME;
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name[3] = pid;
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len = sizeof(sv_name);
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error = sysctl(name, 4, sv_name, &len, NULL, 0);
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if (error != 0 || len == 0)
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return (0);
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for (i = 0; i < sizeof(elf32_sv_names) / sizeof(*elf32_sv_names); i++) {
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if (strncmp(sv_name, elf32_sv_names[i], sizeof(sv_name)) == 0)
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return (1);
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}
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return (0);
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}
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static size_t
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retrieve_auxv32(pid_t pid)
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{
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int name[4];
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size_t len, i;
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void *ptr;
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name[0] = CTL_KERN;
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name[1] = KERN_PROC;
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name[2] = KERN_PROC_AUXV;
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name[3] = pid;
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len = sizeof(auxv32);
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if (sysctl(name, 4, auxv32, &len, NULL, 0) == -1) {
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if (errno != ESRCH && errno != EPERM)
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warn("sysctl: kern.proc.auxv: %d: %d", pid, errno);
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return (0);
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}
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for (i = 0; i < len; i++) {
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/*
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* XXX: We expect that values for a_type on a 32-bit platform
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* are directly mapped to those on 64-bit one, which is not
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* necessarily true.
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*/
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auxv[i].a_type = auxv32[i].a_type;
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ptr = &auxv32[i].a_un;
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auxv[i].a_un.a_val = *((uint32_t *)ptr);
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}
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return (len);
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}
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#endif /* __ELF_WORD_SIZE == 64 */
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#define PRINT(name, spec, val) \
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printf("%s %-16s " #spec "\n", prefix, #name, (val))
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#define PRINT_UNKNOWN(type, val) \
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printf("%s %16ld %#lx\n", prefix, (long)type, (u_long)(val))
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static size_t
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retrieve_auxv(pid_t pid)
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{
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int name[4];
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size_t len;
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#if __ELF_WORD_SIZE == 64
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if (is_elf32(pid))
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return (retrieve_auxv32(pid));
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#endif
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name[0] = CTL_KERN;
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name[1] = KERN_PROC;
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name[2] = KERN_PROC_AUXV;
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name[3] = pid;
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len = sizeof(auxv);
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if (sysctl(name, 4, auxv, &len, NULL, 0) == -1) {
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if (errno != ESRCH && errno != EPERM)
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warn("sysctl: kern.proc.auxv: %d: %d", pid, errno);
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return (0);
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}
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return (len);
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}
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void
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procstat_auxv(struct kinfo_proc *kipp)
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{
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size_t len, i;
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if (!hflag)
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printf("%5s %-16s %-16s %-16s\n", "PID", "COMM", "AUXV", "VALUE");
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len = retrieve_auxv(kipp->ki_pid);
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if (len == 0)
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return;
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snprintf(prefix, sizeof(prefix), "%5d %-16s", kipp->ki_pid,
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kipp->ki_comm);
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for (i = 0; i < len; i++) {
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switch(auxv[i].a_type) {
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case AT_NULL:
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return;
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case AT_IGNORE:
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break;
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case AT_EXECFD:
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PRINT(AT_EXECFD, %ld, (long)auxv[i].a_un.a_val);
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break;
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case AT_PHDR:
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PRINT(AT_PHDR, %p, auxv[i].a_un.a_ptr);
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break;
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case AT_PHENT:
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PRINT(AT_PHENT, %ld, (long)auxv[i].a_un.a_val);
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break;
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case AT_PHNUM:
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PRINT(AT_PHNUM, %ld, (long)auxv[i].a_un.a_val);
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break;
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case AT_PAGESZ:
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PRINT(AT_PAGESZ, %ld, (long)auxv[i].a_un.a_val);
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break;
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case AT_BASE:
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PRINT(AT_BASE, %p, auxv[i].a_un.a_ptr);
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break;
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case AT_FLAGS:
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PRINT(AT_FLAGS, %#lx, (u_long)auxv[i].a_un.a_val);
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break;
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case AT_ENTRY:
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PRINT(AT_ENTRY, %p, auxv[i].a_un.a_ptr);
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break;
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#ifdef AT_NOTELF
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case AT_NOTELF:
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PRINT(AT_NOTELF, %ld, (long)auxv[i].a_un.a_val);
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break;
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#endif
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#ifdef AT_UID
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case AT_UID:
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PRINT(AT_UID, %ld, (long)auxv[i].a_un.a_val);
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break;
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#endif
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#ifdef AT_EUID
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case AT_EUID:
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PRINT(AT_EUID, %ld, (long)auxv[i].a_un.a_val);
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break;
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#endif
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#ifdef AT_GID
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case AT_GID:
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PRINT(AT_GID, %ld, (long)auxv[i].a_un.a_val);
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break;
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#endif
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#ifdef AT_EGID
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case AT_EGID:
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PRINT(AT_EGID, %ld, (long)auxv[i].a_un.a_val);
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break;
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#endif
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case AT_EXECPATH:
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PRINT(AT_EXECPATH, %p, auxv[i].a_un.a_ptr);
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break;
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case AT_CANARY:
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PRINT(AT_CANARY, %p, auxv[i].a_un.a_ptr);
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break;
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case AT_CANARYLEN:
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PRINT(AT_CANARYLEN, %ld, (long)auxv[i].a_un.a_val);
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break;
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case AT_OSRELDATE:
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PRINT(AT_OSRELDATE, %ld, (long)auxv[i].a_un.a_val);
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break;
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case AT_NCPUS:
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PRINT(AT_NCPUS, %ld, (long)auxv[i].a_un.a_val);
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break;
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case AT_PAGESIZES:
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PRINT(AT_PAGESIZES, %p, auxv[i].a_un.a_ptr);
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break;
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case AT_PAGESIZESLEN:
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PRINT(AT_PAGESIZESLEN, %ld, (long)auxv[i].a_un.a_val);
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break;
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case AT_STACKPROT:
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if ((auxv[i].a_un.a_val & VM_PROT_EXECUTE) != 0)
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PRINT(AT_STACKPROT, %s, "NONEXECUTABLE");
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else
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PRINT(AT_STACKPROT, %s, "EXECUTABLE");
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break;
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case AT_COUNT:
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PRINT(AT_COUNT, %ld, (long)auxv[i].a_un.a_val);
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break;
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default:
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PRINT_UNKNOWN(auxv[i].a_type, auxv[i].a_un.a_val);
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break;
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}
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}
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printf("\n");
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}
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