/**\file srUtils.c * \brief General utilties that fit nowhere else. * * The namespace for this file is "srUtil". * * \author Rainer Gerhards * \date 2003-09-09 * Coding begun. * * Copyright 2003-2007 Rainer Gerhards and Adiscon GmbH. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * A copy of the GPL can be found in the file "COPYING" in this distribution. */ #include "config.h" #include "rsyslog.h" /* THIS IS A MODIFICATION FOR RSYSLOG! 2004-11-18 rgerards */ #include #include #include #include #include #include #include #include #include #include #include "liblogging-stub.h" /* THIS IS A MODIFICATION FOR RSYSLOG! 2004-11-18 rgerards */ #define TRUE 1 #define FALSE 0 #include "srUtils.h" #include "syslogd.h" /* ################################################################# * * private members * * ################################################################# */ /* As this is not a "real" object, there won't be any private * members in this file. */ /* ################################################################# * * public members * * ################################################################# */ rsRetVal srUtilItoA(char *pBuf, int iLenBuf, int iToConv) { int i; int bIsNegative; char szBuf[32]; /* sufficiently large for my lifespan and those of my children... ;) */ assert(pBuf != NULL); assert(iLenBuf > 1); /* This is actually an app error and as thus checked for... */ if(iToConv < 0) { bIsNegative = TRUE; iToConv *= -1; } else bIsNegative = FALSE; /* first generate a string with the digits in the reverse direction */ i = 0; do { szBuf[i] = iToConv % 10 + '0'; iToConv /= 10; } while(iToConv > 0); /* warning: do...while()! */ /* make sure we are within bounds... */ if(i + 2 > iLenBuf) /* +2 because: a) i starts at zero! b) the \0 byte */ return RS_RET_PROVIDED_BUFFER_TOO_SMALL; /* then move it to the right direction... */ if(bIsNegative == TRUE) *pBuf++ = '-'; while(i >= 0) *pBuf++ = szBuf[i--]; *pBuf = '\0'; /* terminate it!!! */ return RS_RET_OK; } uchar *srUtilStrDup(uchar *pOld, size_t len) { uchar *pNew; assert(pOld != NULL); if((pNew = malloc(len + 1)) != NULL) memcpy(pNew, pOld, len + 1); return pNew; } /* creates a path recursively * Return 0 on success, -1 otherwise. On failure, errno * hold the last OS error. * Param "mode" holds the mode that all non-existing directories * are to be created with. */ int makeFileParentDirs(uchar *szFile, size_t lenFile, mode_t mode, uid_t uid, gid_t gid, int bFailOnChownFail) { uchar *p; uchar *pszWork; size_t len; int bErr = 0; assert(szFile != NULL); assert(lenFile > 0); len = lenFile + 1; /* add one for '\0'-byte */ if((pszWork = malloc(sizeof(uchar) * len)) == NULL) return -1; memcpy(pszWork, szFile, len); for(p = pszWork+1 ; *p ; p++) if(*p == '/') { /* temporarily terminate string, create dir and go on */ *p = '\0'; if(access((char*)pszWork, F_OK)) { if(mkdir((char*)pszWork, mode) == 0) { if(uid != (uid_t) -1 || gid != (gid_t) -1) { /* we need to set owner/group */ if(chown((char*)pszWork, uid, gid) != 0) if(bFailOnChownFail) bErr = 1; /* silently ignore if configured * to do so. */ } } else bErr = 1; if(bErr) { int eSave = errno; free(pszWork); errno = eSave; return -1; } } *p = '/'; } free(pszWork); return 0; } /* execute a program with a single argument * returns child pid if everything ok, 0 on failure. if * it fails, errno is set. if it fails after the fork(), the caller * can not be notfied for obvious reasons. if bwait is set to 1, * the code waits until the child terminates - that potentially takes * a lot of time. * implemented 2007-07-20 rgerhards */ int execProg(uchar *program, int bWait, uchar *arg) { int pid; int sig; dbgprintf("exec program '%s' with param '%s'\n", program, arg); pid = fork(); if (pid < 0) { return 0; } if(pid) { /* Parent */ if(bWait) if(waitpid(pid, NULL, 0) == -1) if(errno != ECHILD) { /* we do not use logerror(), because * that might bring us into an endless * loop. At some time, we may * reconsider this behaviour. */ dbgprintf("could not wait on child after executing '%s'", (char*)program); } return pid; } /* Child */ alarm(0); /* create a clean environment before we exec the real child */ for(sig = 0 ; sig < 32 ; ++sig) signal(sig, SIG_DFL); execlp((char*)program, (char*) program, (char*)arg, NULL); /* In the long term, it's a good idea to implement some enhanced error * checking here. However, it can not easily be done. For starters, we * may run into endless loops if we log to syslog. The next problem is * that output is typically not seen by the user. For the time being, * we use no error reporting, which is quite consitent with the old * system() way of doing things. rgerhards, 2007-07-20 */ perror("exec"); exit(1); /* not much we can do in this case */ } /* skip over whitespace in a standard C string. The * provided pointer is advanced to the first non-whitespace * charater or the \0 byte, if there is none. It is never * moved past the \0. */ void skipWhiteSpace(uchar **pp) { register uchar *p; assert(pp != NULL); assert(*pp != NULL); p = *pp; while(*p && isspace((int) *p)) ++p; *pp = p; } /* * vi:set ai: */