300 lines
6.8 KiB
C
300 lines
6.8 KiB
C
/*****************************************************************************
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*
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* $Id$
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* Purpose ...............: Execute subprogram
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*
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*****************************************************************************
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* Copyright (C) 1997-2005
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*
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* Michiel Broek FIDO: 2:280/2802
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* Beekmansbos 10
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* 1971 BV IJmuiden
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* the Netherlands
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*
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* This file is part of MBSE BBS.
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*
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* This BBS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* MBSE BBS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 MBSE BBS; see the file COPYING. If not, write to the Free
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* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*****************************************************************************/
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#include "../config.h"
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#include "mbselib.h"
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int e_pid = 0; /* Execute child pid */
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int _execute(char **, char *, char *, char *);
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int _execute(char **args, char *in, char *out, char *err)
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{
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char buf[PATH_MAX];
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int i, pid, status = 0, rc = 0;
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memset(&buf, 0, sizeof(buf));
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for (i = 0; i < 16; i++) {
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if (args[i])
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snprintf(buf + strlen(buf), PATH_MAX - strlen(buf), " %s", args[i]);
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else
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break;
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}
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Syslog('+', "Execute:%s",buf);
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fflush(stdout);
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fflush(stderr);
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if ((pid = fork()) == 0) {
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/*
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* A delay in the child to prevent it returns before the main
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* process sees it ever started.
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*/
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msleep(150);
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if (in) {
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close(0);
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if (open(in,O_RDONLY) != 0) {
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WriteError("$Reopen of stdin to %s failed", MBSE_SS(in));
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exit(MBERR_EXEC_FAILED);
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}
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}
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if (out) {
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close(1);
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if (open(out,O_WRONLY | O_APPEND | O_CREAT,0600) != 1) {
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WriteError("$Reopen of stdout to %s failed", MBSE_SS(out));
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exit(MBERR_EXEC_FAILED);
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}
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}
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if (err) {
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close(2);
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if (open(err,O_WRONLY | O_APPEND | O_CREAT,0600) != 2) {
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WriteError("$Reopen of stderr to %s failed", MBSE_SS(err));
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exit(MBERR_EXEC_FAILED);
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}
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}
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errno = 0;
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if (CFG.priority) {
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rc = getpriority(PRIO_PROCESS, 0);
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if (errno == 0) {
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rc = setpriority(PRIO_PROCESS, 0, CFG.priority);
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if (rc)
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WriteError("$execv can't set priority to %d", CFG.priority);
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}
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}
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rc = execv(args[0],args);
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WriteError("$execv \"%s\" returned %d", MBSE_SS(args[0]), rc);
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exit(MBERR_EXEC_FAILED);
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}
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e_pid = pid;
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do {
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rc = wait(&status);
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e_pid = 0;
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} while (((rc > 0) && (rc != pid)) || ((rc == -1) && (errno == EINTR)));
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switch (rc) {
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case -1:
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if (errno == ECHILD) {
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Syslog('+', "Execute: no child process");
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return 0;
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} else {
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WriteError("$Wait returned %d, status %d,%d", rc,status>>8,status&0xff);
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return -1;
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}
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case 0:
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return 0;
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default:
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if (WIFEXITED(status)) {
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rc = WEXITSTATUS(status);
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if (rc) {
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WriteError("Execute: returned error %d", rc);
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return (rc + MBERR_EXTERNAL);
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}
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}
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if (WIFSIGNALED(status)) {
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rc = WTERMSIG(status);
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WriteError("Wait stopped on signal %d", rc);
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return rc;
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}
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if (rc)
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WriteError("Wait stopped unknown, rc=%d", rc);
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return rc;
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}
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return 0;
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}
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int execute(char **args, char *in, char *out, char *err)
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{
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int rc;
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if (CFG.do_sync)
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sync();
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rc = _execute(args, in, out, err);
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if (CFG.do_sync)
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sync();
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return rc;
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}
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/*
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* The old behaviour, parse command strings to arguments.
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*/
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int execute_str(char *cmd, char *fil, char *pkt, char *in, char *out, char *err)
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{
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int i;
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char *args[16], buf[PATH_MAX];
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memset(args, 0, sizeof(args));
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memset(&buf, 0, sizeof(buf));
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i = 0;
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if ((pkt != NULL) && strlen(pkt))
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snprintf(buf, PATH_MAX -1, "%s %s %s", cmd, fil, pkt);
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else
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snprintf(buf, PATH_MAX -1, "%s %s", cmd, fil);
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args[i++] = strtok(buf, " \t\0");
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while ((args[i++] = strtok(NULL," \t\n")) && (i < 15));
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args[i++] = NULL;
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return execute(args, in, out, err);
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}
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/*
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* Execute command in the PATH.
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*/
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int execute_pth(char *prog, char *opts, char *in, char *out, char *err)
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{
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char *pth;
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int rc;
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if (strchr(prog, ' ') || strchr(prog, '/')) {
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WriteError("First parameter of execute_pth() must be a program name");
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return -1;
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}
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pth = xstrcpy((char *)"/usr/bin/");
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pth = xstrcat(pth, prog);
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if (access(pth, X_OK) == -1) {
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free(pth);
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pth = xstrcpy((char *)"/usr/local/bin/");
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pth = xstrcat(pth, prog);
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if (access(pth, X_OK) == -1) {
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free(pth);
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pth = xstrcpy((char *)"/bin/");
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pth = xstrcat(pth, prog);
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if (access(pth, X_OK) == -1) {
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free(pth);
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pth = xstrcpy((char *)"/usr/pkg/bin/");
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pth = xstrcat(pth, prog);
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if (access(pth, X_OK) == -1) {
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WriteError("Can't find %s", prog);
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free(pth);
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return -1;
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}
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}
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}
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}
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rc = execute_str(pth, opts, NULL, in, out, err);
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free(pth);
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return rc;
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}
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#define SHELL "/bin/sh"
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int _execsh(char *, char *, char *, char *);
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int _execsh(char *cmd, char *in, char *out, char *err)
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{
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int pid, status, rc, sverr;
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Syslog('+', "Execute shell: %s", MBSE_SS(cmd));
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fflush(stdout);
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fflush(stderr);
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if ((pid = fork()) == 0) {
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/*
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* A delay in the child to prevent it returns before the main
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* process sess it ever started.
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*/
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msleep(150);
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if (in) {
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close(0);
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if (open(in, O_RDONLY) != 0) {
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WriteError("$Reopen of stdin to %s failed",MBSE_SS(in));
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exit(MBERR_EXEC_FAILED);
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}
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}
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if (out) {
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close(1);
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if (open(out, O_WRONLY | O_APPEND | O_CREAT,0600) != 1) {
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WriteError("$Reopen of stdout to %s failed",MBSE_SS(out));
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exit(MBERR_EXEC_FAILED);
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}
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}
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if (err) {
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close(2);
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if (open(err, O_WRONLY | O_APPEND | O_CREAT,0600) != 2) {
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WriteError("$Reopen of stderr to %s failed",MBSE_SS(err));
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exit(MBERR_EXEC_FAILED);
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}
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}
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rc = execl(SHELL, "sh", "-c", cmd, NULL);
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WriteError("$execl \"%s\" returned %d", MBSE_SS(cmd), rc);
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exit(MBERR_EXEC_FAILED);
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}
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e_pid = pid;
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do {
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rc = wait(&status);
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e_pid = 0;
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sverr = errno;
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if (status)
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WriteError("$Wait returned %d, status %d,%d", rc, status >> 8, status & 0xff);
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}
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while (((rc > 0) && (rc != pid)) || ((rc == -1) && (sverr == EINTR)));
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if (rc == -1) {
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WriteError("$Wait returned %d, status %d,%d", rc, status >> 8, status & 0xff);
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return 0;
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}
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return status;
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}
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int execsh(char *cmd, char *in, char *out, char *err)
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{
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int rc;
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if (CFG.do_sync)
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sync();
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rc = _execsh(cmd, in, out, err);
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if (CFG.do_sync)
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sync();
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return rc;
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}
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