| 1 | /* $Id: process-posix.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Process, POSIX.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 |
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| 39 | /*********************************************************************************************************************************
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| 40 | * Header Files *
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| 41 | *********************************************************************************************************************************/
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| 42 | #define LOG_GROUP RTLOGGROUP_PROCESS
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| 43 | #include <unistd.h>
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| 44 | #include <stdlib.h>
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| 45 | #include <errno.h>
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| 46 | #include <sys/types.h>
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| 47 | #include <sys/stat.h>
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| 48 | #include <sys/wait.h>
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| 49 | #include <signal.h>
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| 50 | #include <pwd.h>
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| 51 |
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| 52 | #include <iprt/process.h>
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| 53 | #include "internal/iprt.h"
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| 54 |
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| 55 | #include <iprt/assert.h>
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| 56 | #include <iprt/env.h>
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| 57 | #include <iprt/err.h>
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| 58 | #include <iprt/file.h>
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| 59 | #include <iprt/pipe.h>
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| 60 | #include <iprt/socket.h>
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| 61 | #include <iprt/string.h>
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| 62 | #include <iprt/mem.h>
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| 63 | #include "internal/process.h"
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| 64 |
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| 65 |
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| 66 | RTR3DECL(int) RTProcWait(RTPROCESS Process, unsigned fFlags, PRTPROCSTATUS pProcStatus)
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| 67 | {
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| 68 | int rc;
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| 69 | do rc = RTProcWaitNoResume(Process, fFlags, pProcStatus);
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| 70 | while (rc == VERR_INTERRUPTED);
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| 71 | return rc;
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| 72 | }
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| 73 |
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| 74 |
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| 75 | RTR3DECL(int) RTProcWaitNoResume(RTPROCESS Process, unsigned fFlags, PRTPROCSTATUS pProcStatus)
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| 76 | {
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| 77 | /*
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| 78 | * Validate input.
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| 79 | */
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| 80 | if (Process <= 0)
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| 81 | {
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| 82 | AssertMsgFailed(("Invalid Process=%d\n", Process));
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| 83 | return VERR_INVALID_PARAMETER;
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| 84 | }
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| 85 | if (fFlags & ~(RTPROCWAIT_FLAGS_NOBLOCK | RTPROCWAIT_FLAGS_BLOCK))
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| 86 | {
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| 87 | AssertMsgFailed(("Invalid flags %#x\n", fFlags));
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| 88 | return VERR_INVALID_PARAMETER;
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| 89 | }
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| 90 |
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| 91 | /*
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| 92 | * Perform the wait.
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| 93 | */
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| 94 | int iStatus = 0;
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| 95 | int rc = waitpid(Process, &iStatus, fFlags & RTPROCWAIT_FLAGS_NOBLOCK ? WNOHANG : 0);
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| 96 | if (rc > 0)
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| 97 | {
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| 98 | /*
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| 99 | * Fill in the status structure.
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| 100 | */
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| 101 | if (pProcStatus)
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| 102 | {
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| 103 | if (WIFEXITED(iStatus))
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| 104 | {
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| 105 | pProcStatus->enmReason = RTPROCEXITREASON_NORMAL;
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| 106 | pProcStatus->iStatus = WEXITSTATUS(iStatus);
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| 107 | }
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| 108 | else if (WIFSIGNALED(iStatus))
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| 109 | {
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| 110 | pProcStatus->enmReason = RTPROCEXITREASON_SIGNAL;
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| 111 | pProcStatus->iStatus = WTERMSIG(iStatus);
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| 112 | }
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| 113 | else
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| 114 | {
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| 115 | Assert(!WIFSTOPPED(iStatus));
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| 116 | pProcStatus->enmReason = RTPROCEXITREASON_ABEND;
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| 117 | pProcStatus->iStatus = iStatus;
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| 118 | }
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| 119 | }
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| 120 | return VINF_SUCCESS;
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| 121 | }
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| 122 |
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| 123 | /*
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| 124 | * Child running?
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| 125 | */
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| 126 | if (!rc)
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| 127 | {
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| 128 | Assert(fFlags & RTPROCWAIT_FLAGS_NOBLOCK);
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| 129 | return VERR_PROCESS_RUNNING;
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| 130 | }
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| 131 |
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| 132 | /*
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| 133 | * Figure out which error to return.
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| 134 | */
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| 135 | int iErr = errno;
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| 136 | if (iErr == ECHILD)
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| 137 | return VERR_PROCESS_NOT_FOUND;
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| 138 | return RTErrConvertFromErrno(iErr);
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| 139 | }
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| 140 |
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| 141 |
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| 142 | RTR3DECL(int) RTProcTerminate(RTPROCESS Process)
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| 143 | {
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| 144 | if (Process == NIL_RTPROCESS)
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| 145 | return VINF_SUCCESS;
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| 146 |
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| 147 | if (!kill(Process, SIGKILL))
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| 148 | return VINF_SUCCESS;
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| 149 | return RTErrConvertFromErrno(errno);
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| 150 | }
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| 151 |
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| 152 |
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| 153 | RTR3DECL(uint64_t) RTProcGetAffinityMask(void)
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| 154 | {
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| 155 | /// @todo
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| 156 | return 1;
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| 157 | }
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| 158 |
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| 159 |
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| 160 | RTR3DECL(int) RTProcQueryParent(RTPROCESS hProcess, PRTPROCESS phParent)
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| 161 | {
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| 162 | if (hProcess == RTProcSelf())
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| 163 | {
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| 164 | *phParent = getppid();
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| 165 | return VINF_SUCCESS;
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| 166 | }
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| 167 | return VERR_NOT_SUPPORTED;
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| 168 | }
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| 169 |
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| 170 |
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| 171 | RTR3DECL(int) RTProcQueryUsername(RTPROCESS hProcess, char *pszUser, size_t cbUser, size_t *pcbUser)
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| 172 | {
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| 173 | AssertReturn( (pszUser && cbUser > 0)
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| 174 | || (!pszUser && !cbUser), VERR_INVALID_PARAMETER);
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| 175 | AssertReturn(pcbUser || pszUser, VERR_INVALID_PARAMETER);
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| 176 |
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| 177 | int rc;
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| 178 | if ( hProcess == NIL_RTPROCESS
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| 179 | || hProcess == RTProcSelf())
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| 180 | {
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| 181 | /*
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| 182 | * Figure a good buffer estimate.
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| 183 | */
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| 184 | int32_t cbPwdMax = sysconf(_SC_GETPW_R_SIZE_MAX);
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| 185 | if (cbPwdMax <= _1K)
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| 186 | cbPwdMax = _1K;
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| 187 | else
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| 188 | AssertStmt(cbPwdMax <= 32*_1M, cbPwdMax = 32*_1M);
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| 189 | char *pchBuf = (char *)RTMemTmpAllocZ(cbPwdMax);
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| 190 | if (pchBuf)
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| 191 | {
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| 192 | /*
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| 193 | * Get the password file entry.
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| 194 | */
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| 195 | struct passwd Pwd;
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| 196 | struct passwd *pPwd = NULL;
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| 197 | rc = getpwuid_r(geteuid(), &Pwd, pchBuf, cbPwdMax, &pPwd);
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| 198 | if (!rc)
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| 199 | {
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| 200 | /*
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| 201 | * Convert the name to UTF-8, assuming that we're getting it in the local codeset.
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| 202 | */
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| 203 | /** @todo This isn't exactly optimal... the current codeset/page conversion
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| 204 | * stuff never was. Should optimize that for UTF-8 and ASCII one day.
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| 205 | * And also optimize for avoiding heap. */
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| 206 | char *pszTmp = NULL;
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| 207 | rc = RTStrCurrentCPToUtf8(&pszTmp, pPwd->pw_name);
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| 208 | if (RT_SUCCESS(rc))
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| 209 | {
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| 210 | size_t cbTmp = strlen(pszTmp) + 1;
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| 211 | if (pcbUser)
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| 212 | *pcbUser = cbTmp;
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| 213 | if (cbTmp <= cbUser)
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| 214 | {
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| 215 | memcpy(pszUser, pszTmp, cbTmp);
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| 216 | rc = VINF_SUCCESS;
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| 217 | }
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| 218 | else
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| 219 | rc = VERR_BUFFER_OVERFLOW;
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| 220 | RTStrFree(pszTmp);
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| 221 | }
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| 222 | }
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| 223 | else
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| 224 | rc = RTErrConvertFromErrno(rc);
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| 225 | RTMemFree(pchBuf);
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| 226 | }
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| 227 | else
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| 228 | rc = VERR_NO_TMP_MEMORY;
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| 229 | }
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| 230 | else
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| 231 | rc = VERR_NOT_SUPPORTED;
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| 232 | return rc;
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| 233 | }
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| 234 |
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| 235 |
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| 236 | RTR3DECL(int) RTProcQueryUsernameA(RTPROCESS hProcess, char **ppszUser)
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| 237 | {
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| 238 | AssertPtrReturn(ppszUser, VERR_INVALID_POINTER);
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| 239 |
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| 240 | int rc;
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| 241 | if ( hProcess == NIL_RTPROCESS
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| 242 | || hProcess == RTProcSelf())
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| 243 | {
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| 244 | /*
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| 245 | * Figure a good buffer estimate.
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| 246 | */
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| 247 | int32_t cbPwdMax = sysconf(_SC_GETPW_R_SIZE_MAX);
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| 248 | if (cbPwdMax <= _1K)
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| 249 | cbPwdMax = _1K;
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| 250 | else
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| 251 | AssertStmt(cbPwdMax <= 32*_1M, cbPwdMax = 32*_1M);
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| 252 | char *pchBuf = (char *)RTMemTmpAllocZ(cbPwdMax);
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| 253 | if (pchBuf)
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| 254 | {
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| 255 | /*
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| 256 | * Get the password file entry.
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| 257 | */
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| 258 | struct passwd Pwd;
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| 259 | struct passwd *pPwd = NULL;
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| 260 | rc = getpwuid_r(geteuid(), &Pwd, pchBuf, cbPwdMax, &pPwd);
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| 261 | if (!rc)
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| 262 | {
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| 263 | /*
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| 264 | * Convert the name to UTF-8, assuming that we're getting it in the local codeset.
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| 265 | */
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| 266 | rc = RTStrCurrentCPToUtf8(ppszUser, pPwd->pw_name);
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| 267 | }
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| 268 | else
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| 269 | rc = RTErrConvertFromErrno(rc);
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| 270 | RTMemFree(pchBuf);
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| 271 | }
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| 272 | else
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| 273 | rc = VERR_NO_TMP_MEMORY;
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| 274 | }
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| 275 | else
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| 276 | rc = VERR_NOT_SUPPORTED;
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| 277 | return rc;
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| 278 | }
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| 279 |
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