Mercurial > hg > mlmmj
view src/incindexfile.c @ 887:3032cb926799 BRANCH_1_2_18
Added tag RELEASE_1_2_18_1 for changeset c1b22b049682
author | Ben Schmidt |
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date | Wed, 05 Feb 2014 17:14:22 +1100 |
parents | 89a256e8f1d3 |
children |
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/* Copyright (C) 2002, 2003 Mads Martin Joergensen <mmj at mmj.dk> * * $Id$ * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. */ #include <stdio.h> #include <stdlib.h> #include <errno.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> #include <string.h> #include "wrappers.h" #include "mylocking.h" #include "incindexfile.h" #include "itoa.h" #include "log_error.h" #include "strgen.h" #include "memory.h" #define INTBUF_SIZE 32 int incindexfile(const char *listdir) { int fd, lock; long int index = 0; char intbuf[INTBUF_SIZE] = "uninitialized"; size_t i; char *indexfilename; indexfilename = concatstr(2, listdir, "/index"); fd = open(indexfilename, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR); if(fd == -1) { myfree(indexfilename); log_error(LOG_ARGS, "Error opening index file"); return 0; } lock = myexcllock(fd); if(lock) { myfree(indexfilename); log_error(LOG_ARGS, "Error locking index file"); close(fd); return 0; } readn(fd, intbuf, INTBUF_SIZE); for(i=0; i<sizeof(intbuf); i++) { if(intbuf[i] < '0' || intbuf[i] > '9') { intbuf[i] = '\0'; break; } } index = atol(intbuf); index++; itoa(index, intbuf); lseek(fd, 0, SEEK_SET); writen(fd, intbuf, strlen(intbuf)); close(fd); /* Lock is also released */ myfree(indexfilename); return index; }