[5] | 1 | #include <iostream> |
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| 2 | #include <fstream> |
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| 3 | #include <libgen.h> |
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| 4 | #include <cstdlib> |
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| 5 | #include <string.h> |
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| 6 | |
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| 7 | #include "disparm.h" |
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| 8 | #include "tofromstring.h" |
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| 9 | #include "token.h" |
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| 10 | #include "shellenv.h" |
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| 11 | #include <sys/stat.h> |
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| 12 | #include <errno.h> |
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| 13 | #include <dirent.h> |
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| 14 | |
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| 15 | const std::string disparm::keyname = "DISPARM_KEY"; |
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| 16 | const std::string disparm::committedname = "DISPARM_COMMITTED"; |
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| 17 | const std::string disparm::valuename = "DISPARM_VALUE"; |
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| 18 | const std::string disparm::rcname = "DISPARM_RC"; |
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| 19 | const std::string disparm::linename = "DISPARM_LINENO"; |
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| 20 | |
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| 21 | const std::string disparm::defpath_pool = "pool.disparm"; |
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| 22 | const std::string disparm::definputfilename = "-"; |
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| 23 | |
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| 24 | // |
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| 25 | //constructor disparm |
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| 26 | // |
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| 27 | disparm::disparm() |
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| 28 | { |
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| 29 | char defpoolname_c[this->defpath_pool.length()+1]; // default path_pool |
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| 30 | strcpy(defpoolname_c,this->defpath_pool.c_str()); |
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| 31 | // |
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| 32 | // A note about basename and dirname: they need as argument a char* |
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| 33 | // NOT a const char*. Both functions may modify the argument, |
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| 34 | // so, in general, do not use the same argument more than |
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| 35 | // once. |
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| 36 | // |
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| 37 | char defpath_lockdir_c[this->defpath_lockdir.length()+1]; // default directory for the lockfile |
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| 38 | strcpy(defpath_lockdir_c,this->defpath_lockdir.c_str()); |
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| 39 | this->setpath_pool(this->defpath_pool); |
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| 40 | this->defpath_lockdir = std::string(dirname(defpoolname_c)); |
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| 41 | this->setpath_link(""); |
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| 42 | this->setpath_lock(""); // the name of the lock folder |
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| 43 | this->setbaselinkfilename(""); |
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| 44 | this->setinputfilename(this->definputfilename); // default input file name |
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| 45 | this->setpath_lockdir(this->defpath_lockdir); // default lock directory |
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| 46 | this->setmaxiter(1); // default maximum times a string can be given out |
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| 47 | this->pmarker="pp"; // start of record with pointer to next string in pool |
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| 48 | this->pmarkerlen = this->pmarker.length(); |
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| 49 | this->lockname="lock.disparm"; |
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| 50 | |
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| 51 | std::string shell = getenv("SHELL"); |
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| 52 | if (shell.find("csh") != std::string::npos) |
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| 53 | this->shelltype = SHELL_CSH; |
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| 54 | else |
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| 55 | this->shelltype = SHELL_SH; |
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| 56 | |
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| 57 | // |
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| 58 | // following items are returned on stdout as in: |
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| 59 | // export DISPARM_KEY=1234 |
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| 60 | // See also above |
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| 61 | // |
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| 62 | this->key = -1; // key: pointer to next item in pool |
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| 63 | this->status = '0'; |
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| 64 | this->committed = 0; // the number of times the string is given out |
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| 65 | this->rc = "OK"; // return code |
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| 66 | this->value = ""; // the string to give out |
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| 67 | this->linenr = 0; // the line number in the pool |
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| 68 | |
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| 69 | this->debug = 0; |
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| 70 | } |
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| 71 | |
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| 72 | void disparm::removelock() |
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| 73 | { |
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| 74 | rmdir(this->path_lock.c_str()); |
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| 75 | unlink(this->path_link.c_str()); |
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| 76 | } |
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| 77 | |
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| 78 | void disparm::setpath_pool(std::string pool) |
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| 79 | { |
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| 80 | this->path_pool = pool; |
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| 81 | } |
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| 82 | |
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| 83 | void disparm::setpath_link(std::string path_link) |
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| 84 | { |
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| 85 | this->path_link = path_link; |
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| 86 | } |
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| 87 | |
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| 88 | void disparm::setpath_lock(std::string path_lock) |
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| 89 | { |
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| 90 | this->path_lock = path_lock; |
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| 91 | } |
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| 92 | |
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| 93 | void disparm::setbaselinkfilename(std::string baselinkfilename) |
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| 94 | { |
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| 95 | this->baselinkfilename = baselinkfilename; |
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| 96 | } |
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| 97 | |
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| 98 | int disparm::setpath_lockdir(std::string lockdir) |
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| 99 | { |
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| 100 | this->path_lockdir = lockdir; |
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| 101 | int rc = mkdir(path_lockdir.c_str(),0777); |
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| 102 | if (rc ==0) |
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| 103 | return 0; |
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| 104 | else |
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| 105 | { |
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| 106 | if (errno == EEXIST) |
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| 107 | { |
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| 108 | struct stat buf; |
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| 109 | stat(path_lockdir.c_str(),&buf); |
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| 110 | if (S_ISDIR(buf.st_mode)) |
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| 111 | return 0; |
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| 112 | } |
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| 113 | else |
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| 114 | return -1; |
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| 115 | } |
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| 116 | return 0; // never reached |
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| 117 | } |
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| 118 | |
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| 119 | // |
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| 120 | // we try to generate a name for a linkfile that is unique. |
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| 121 | // In the name is also the creation time. |
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| 122 | // We also create a suitable path_lockdir here. |
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| 123 | // |
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| 124 | void disparm::createlinkfilename() |
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| 125 | { |
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| 126 | if (this->debug) |
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| 127 | this->debugger("Before createlinkfilename:"); |
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| 128 | char hostname[1025]; |
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| 129 | gethostname(hostname,1024); |
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| 130 | char poolname_c[this->path_pool.length()+1]; |
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| 131 | strcpy(poolname_c,this->path_pool.c_str()); |
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| 132 | std::string poolnamebase = basename(poolname_c); |
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| 133 | std::string base = this->path_lockdir + "/" + poolnamebase + ".link."; |
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| 134 | this->setbaselinkfilename(base); |
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| 135 | this->setpath_link( base |
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| 136 | + to_string(time(0)) |
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| 137 | + "." |
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| 138 | + hostname |
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| 139 | + "." |
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| 140 | + to_string(getpid())); |
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| 141 | this->setpath_lock(this->path_lockdir + "/" + this->lockname); |
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| 142 | if (this->debug) |
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| 143 | this->debugger("After createlinkfilename:"); |
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| 144 | } |
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| 145 | |
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| 146 | void disparm::setinputfilename(std::string inputfilename) |
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| 147 | { |
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| 148 | this->inputfilename = inputfilename; |
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| 149 | } |
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| 150 | |
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| 151 | void disparm::setkey(std::streampos key) |
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| 152 | { |
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| 153 | this->key = key; |
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| 154 | } |
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| 155 | |
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| 156 | std::streampos disparm::getkey(void) |
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| 157 | { |
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| 158 | return this->key; |
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| 159 | } |
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| 160 | |
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| 161 | void disparm::setmaxiter(int maxiter) |
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| 162 | { |
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| 163 | this->maxiter = maxiter; |
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| 164 | } |
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| 165 | |
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| 166 | // |
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| 167 | // Create poolfile from input file |
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| 168 | // |
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| 169 | // On return, s wil contain the output of createrc |
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| 170 | // |
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| 171 | int disparm::create(std::string &s) |
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| 172 | { |
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| 173 | if (this->debug) |
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| 174 | this->debugger("Before create:"); |
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| 175 | std::ifstream inp; |
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| 176 | std::istream *pinp; |
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| 177 | s = ""; |
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| 178 | // |
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| 179 | // open inputfile, take care that stdin is also allowed |
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| 180 | // |
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| 181 | if (this->inputfilename == "-") |
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| 182 | pinp = &std::cin; |
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| 183 | else |
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| 184 | { |
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| 185 | inp.open(this->inputfilename.c_str()); |
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| 186 | if (!inp.is_open()) |
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| 187 | { |
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| 188 | std::cerr<<"Cannot open '"<<inputfilename<<"'"<<std::endl; |
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| 189 | this->rc = "FAIL"; |
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| 190 | s = this->createrc(); |
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| 191 | return 1; |
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| 192 | } |
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| 193 | pinp = &inp; |
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| 194 | } |
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| 195 | // |
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| 196 | // open poolfile |
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| 197 | // |
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| 198 | std::string line; |
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| 199 | std::fstream out; |
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| 200 | out.open(this->path_pool.c_str(),std::fstream::in | std::fstream::out |
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| 201 | | std::fstream::trunc); |
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| 202 | |
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| 203 | // |
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| 204 | // fill poolfile |
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| 205 | // |
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| 206 | token tok; |
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| 207 | tok.setfile(out); |
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| 208 | std::streampos p; |
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| 209 | unsigned int linenr = 0; |
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| 210 | while (getline(*pinp,line)) |
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| 211 | { |
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| 212 | tok.setlinenr(++linenr); |
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| 213 | tok.setcommitted(0); |
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| 214 | tok.clearstatus(); |
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| 215 | tok.setvalue(line); |
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| 216 | tok.writetoken(p); |
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| 217 | } |
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| 218 | tok.writelocpointer(0); |
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| 219 | |
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| 220 | // |
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| 221 | // close input file, only if it is not stdin |
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| 222 | // |
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| 223 | if (pinp == &inp) |
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| 224 | inp.close(); |
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| 225 | out.close(); |
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| 226 | |
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| 227 | this->key = 0; |
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| 228 | s = createrc(); |
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| 229 | if (this->debug) |
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| 230 | this->debugger("After create:"); |
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| 231 | |
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| 232 | return 0; |
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| 233 | } |
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| 234 | |
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| 235 | // |
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| 236 | // get next string from pool |
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| 237 | // |
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| 238 | int disparm::next(std::string& s) |
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| 239 | { |
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| 240 | if (this->debug) |
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| 241 | this->debugger("Before next:"); |
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| 242 | int rc = this->realnext(); |
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| 243 | s = this->createrc(); |
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| 244 | if (this->debug) |
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| 245 | this->debugger("After next:"); |
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| 246 | return rc; |
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| 247 | } |
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| 248 | |
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| 249 | // |
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| 250 | // create string to be eval'd by the shell |
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| 251 | // |
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| 252 | std::string disparm::createrc(void) |
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| 253 | { |
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| 254 | std::string s = ""; |
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| 255 | s = s + shellenv(to_string(this->key), this->keyname, this->shelltype); |
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| 256 | s = s + shellenv(to_string(this->committed),this->committedname,this->shelltype); |
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| 257 | s = s + shellenv(to_string(this->value), this->valuename, this->shelltype); |
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| 258 | s = s + shellenv(to_string(this->rc), this->rcname, this->shelltype); |
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| 259 | s = s + shellenv(to_string(this->linenr), this->linename, this->shelltype); |
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| 260 | return s; |
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| 261 | } |
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| 262 | |
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| 263 | // |
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| 264 | // get the next string from the pool |
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| 265 | // |
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| 266 | int disparm::realnext() |
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| 267 | { |
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| 268 | std::fstream file; |
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| 269 | bool good = 1; |
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| 270 | |
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| 271 | this->key = 0; |
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| 272 | this->status = '0'; |
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| 273 | this->committed = 0; |
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| 274 | this->rc = "OK"; |
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| 275 | this->linenr = 0; |
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| 276 | this->value = ""; |
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| 277 | |
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| 278 | // |
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| 279 | // get lock, return if that fails |
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| 280 | // |
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| 281 | if (this->getlock()!=0) |
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| 282 | { |
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| 283 | this->rc = "FAIL"; |
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| 284 | return 1; |
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| 285 | } |
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| 286 | |
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| 287 | // |
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| 288 | // read next string from pool |
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| 289 | // take care of ready records, maximum iterations |
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| 290 | // allowed and some kinds of mishaps |
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| 291 | // |
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| 292 | file.open (this->path_link.c_str(), std::fstream::in | std::fstream::out); |
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| 293 | if (file.is_open()) |
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| 294 | { |
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| 295 | token tok; |
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| 296 | std::string line; |
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| 297 | tok.setfile(file); |
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| 298 | std::streampos locpointer, posused, posnext; |
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| 299 | |
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| 300 | // |
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| 301 | // get pointer to next string |
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| 302 | // |
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| 303 | locpointer = tok.readlocpointer(); |
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| 304 | if (locpointer < 0) |
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| 305 | { |
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| 306 | std::cerr << "Corrupt parameterfile: cannot find locpointer\n" << std::endl; |
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| 307 | this->rc = "FAIL"; |
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| 308 | good = 0; |
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| 309 | } |
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| 310 | // |
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| 311 | // read next string from pool |
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| 312 | // |
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| 313 | if (good) |
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| 314 | { |
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| 315 | int rc = tok.readnext(locpointer,posused,posnext); |
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| 316 | if (rc != 0) |
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| 317 | { |
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| 318 | std::cerr << __FILE__ << ":" << __LINE__ << std::endl; |
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| 319 | std::cerr << "Corrupt or empty parameterfile: cannot read next line\n" << std::endl; |
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| 320 | this->rc = "FAIL"; |
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| 321 | good = 0; |
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| 322 | } |
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| 323 | } |
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| 324 | // |
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| 325 | // keep reading until a valid record is found |
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| 326 | // take appropriate action if no such record exists |
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| 327 | // |
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| 328 | if (good) |
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| 329 | { |
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| 330 | std::streampos locpointerold = locpointer; |
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| 331 | bool allready = 1; // to learn if all records are |
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| 332 | // ready |
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| 333 | while (1) |
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| 334 | { |
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| 335 | if (!tok.getready()) |
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| 336 | { |
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| 337 | allready = 0; |
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| 338 | if (tok.getcommitted() >= this->maxiter) |
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| 339 | { |
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| 340 | good = 0; |
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| 341 | this->rc = "MAX_EXCEEDED"; |
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| 342 | break; |
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| 343 | } |
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| 344 | this->key = posused; |
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| 345 | this->status = tok.getstatus(); |
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| 346 | this->committed = tok.getcommitted(); |
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| 347 | this->value = tok.getvalue(); |
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| 348 | this->linenr = tok.getlinenr(); |
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| 349 | tok.setcommitted(tok.getcommitted()+1); |
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| 350 | tok.writetoken(posused); |
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| 351 | tok.writelocpointer(posused); |
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| 352 | break; |
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| 353 | } |
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| 354 | locpointer = posnext; |
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| 355 | if (locpointer == locpointerold) |
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| 356 | { |
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| 357 | // |
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| 358 | // so we are cycling, nothing to find, it seems |
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| 359 | // |
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| 360 | good = 0; |
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| 361 | if (allready) |
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| 362 | this->rc = "ALL_READY"; |
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| 363 | else |
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| 364 | this->rc = "MAX_EXCEEDED"; |
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| 365 | break; |
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| 366 | } |
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| 367 | int rc = tok.readnext(locpointer,posused,posnext); |
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| 368 | if (rc != 0) |
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| 369 | { |
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| 370 | std::cerr << __FILE__ << ":" << __LINE__ << std::endl; |
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| 371 | std::cerr << "Corrupt or empty parameterfile: cannot read next line\n" << std::endl; |
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| 372 | this->rc = "FAIL"; |
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| 373 | good = 0; |
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| 374 | break; |
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| 375 | } |
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| 376 | } |
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| 377 | } |
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| 378 | } |
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| 379 | else |
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| 380 | { |
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| 381 | std::cerr<<"Strange error: cannot open '"<<path_link<<"'"<<std::endl; |
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| 382 | return 1; |
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| 383 | } |
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| 384 | |
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| 385 | file.close(); |
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| 386 | this->removelock(); |
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| 387 | return !good; |
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| 388 | } |
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| 389 | |
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| 390 | // |
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| 391 | // get a lock on the poolfile |
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| 392 | // The normal methods don't work on an nfs filesystem. |
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| 393 | // Luckily, there is a method based on links to the |
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| 394 | // file to be locked, see also man(2) open under O_EXCL |
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| 395 | // |
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| 396 | // Creating a link is atomic, so it suffices to see if |
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| 397 | // the link count equals to two. If not, we try again. |
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| 398 | // |
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| 399 | // It seems that the file used for linking contains displays |
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| 400 | // an up-to-date content. |
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| 401 | // |
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| 402 | int disparm::getlock(void) |
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| 403 | { |
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| 404 | struct stat buf; |
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| 405 | int rc; |
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| 406 | int sleeptime=2; |
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| 407 | |
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| 408 | int iter = 0; |
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| 409 | int ntryremovelock = 0; |
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| 410 | while(1) |
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| 411 | { |
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| 412 | // |
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| 413 | // check poolfile's linkcount |
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| 414 | // if link count == 1, we try to create a link, else wait |
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| 415 | // |
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| 416 | rc = stat(this->path_pool.c_str(),&buf); |
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| 417 | std::string er=""; |
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| 418 | switch (errno) |
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| 419 | { |
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| 420 | case (EACCES): er="Search permission is denied for one of the directories in the path prefix of path. (See also path_resolution(7).)"; |
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| 421 | break; |
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| 422 | |
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| 423 | case(EBADF): er="fd is bad."; |
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| 424 | break; |
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| 425 | |
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| 426 | case(EFAULT): er="Bad address."; |
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| 427 | break; |
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| 428 | |
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| 429 | case(ELOOP): er="Too many symbolic links encountered while traversing the path."; |
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| 430 | break; |
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| 431 | |
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| 432 | case(ENAMETOOLONG):er="File name too long."; |
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| 433 | break; |
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| 434 | |
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| 435 | case(ENOENT): er="A component of path does not exist, or path is an empty string."; |
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| 436 | break; |
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| 437 | |
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| 438 | case(ENOMEM): er="Out of memory (i.e., kernel memory)."; |
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| 439 | break; |
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| 440 | |
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| 441 | case(ENOTDIR): |
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| 442 | er="A component of the path prefix of path is not a directory."; |
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| 443 | break; |
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| 444 | |
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| 445 | case(EOVERFLOW):er="(stat()) path refers to a file whose size cannot be represented in the type off_t. This can occur when an application compiled on a 32-bit platform without -D_FILE_OFFSET_BITS=64 calls stat() on a file whose size exceeds (2<<31)-1 bits"; |
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| 446 | break; |
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| 447 | |
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| 448 | } |
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| 449 | if (rc !=0 ) |
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| 450 | { |
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| 451 | std::cerr<<er<<std::endl; |
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| 452 | perror(" Error stat poolfile:"); |
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| 453 | std::cerr<<"Cannot stat the pool file:'"<<this->path_pool.c_str()<<"'"<< std::endl; |
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| 454 | return 1; |
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| 455 | } |
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| 456 | this->createlinkfilename(); |
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| 457 | rc = mkdir(this->path_lock.c_str(), 0700); |
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| 458 | if (rc == 0) |
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| 459 | { |
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| 460 | // create link |
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| 461 | int rc = link(this->path_pool.c_str(),this->path_link.c_str()); |
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| 462 | if (rc < 0) |
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| 463 | { |
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| 464 | std::cerr<<"Cannot make link '"<<this->path_link<<"' to '" |
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| 465 | <<this->path_pool<<"'"<<std::endl<<" Is poolname '"<<path_pool |
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| 466 | <<"' correct?"<<std::endl; |
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| 467 | return 1; |
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| 468 | } |
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| 469 | break; |
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| 470 | } |
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| 471 | // |
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| 472 | // wait some time before trying again |
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| 473 | // |
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| 474 | iter++; |
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| 475 | std::cerr << iter <<": waiting for lock " << std::endl; |
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| 476 | sleep(sleeptime); |
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| 477 | if (iter > 9) |
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| 478 | { |
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| 479 | std::cerr << "Trying to remove locks" << std::endl; |
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| 480 | // |
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| 481 | // remove stale link files |
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| 482 | // |
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| 483 | this->remove_lock_and_links(); |
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| 484 | ntryremovelock ++; |
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| 485 | if (ntryremovelock > 10) |
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| 486 | { |
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| 487 | std::cerr << "Cannot get lock after many tries." << std::endl; |
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| 488 | return 1; |
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| 489 | } |
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| 490 | iter = 0; |
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| 491 | } |
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| 492 | } |
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| 493 | return 0; |
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| 494 | } |
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| 495 | |
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| 496 | // |
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| 497 | // mark string as ready |
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| 498 | // |
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| 499 | int disparm::ready() |
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| 500 | { |
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| 501 | if (this->getlock()!=0) |
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| 502 | { |
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| 503 | return 1; |
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| 504 | } |
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| 505 | |
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| 506 | // |
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| 507 | // if no key given as parameter, read it from environment |
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| 508 | // |
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| 509 | if (this->key < 0) |
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| 510 | { |
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| 511 | char * s = getenv(this->keyname.c_str()); |
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| 512 | if (s == NULL || *s == 0) |
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| 513 | { |
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| 514 | this->removelock(); |
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| 515 | std::cerr << "No key given" << std::endl; |
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| 516 | return 1; |
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| 517 | } |
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| 518 | else |
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| 519 | { |
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| 520 | this->key = from_string<long long>(std::string(s)); |
---|
| 521 | } |
---|
| 522 | } |
---|
| 523 | |
---|
| 524 | std::streampos locpointer = this->key; |
---|
| 525 | std::fstream file; |
---|
| 526 | |
---|
| 527 | file.open (this->path_link.c_str(), std::fstream::in | std::fstream::out); |
---|
| 528 | if (file.is_open()) |
---|
| 529 | { |
---|
| 530 | token tok; |
---|
| 531 | std::string line; |
---|
| 532 | tok.setfile(file); |
---|
| 533 | std::streampos posused,posnext; |
---|
| 534 | // |
---|
| 535 | // read next record |
---|
| 536 | // |
---|
| 537 | int rc = tok.readnext(locpointer,posused,posnext); |
---|
| 538 | if (rc != 0) |
---|
| 539 | { |
---|
| 540 | std::cerr << __FILE__ << ":" << __LINE__ << std::endl; |
---|
| 541 | std::cerr << "Corrupt or empty parameterfile: cannot read next line\n" << std::endl; |
---|
| 542 | file.close(); |
---|
| 543 | this->removelock(); |
---|
| 544 | return 1; |
---|
| 545 | } |
---|
| 546 | // |
---|
| 547 | // mark record as ready |
---|
| 548 | // |
---|
| 549 | tok.ready(); |
---|
| 550 | // |
---|
| 551 | // write record back |
---|
| 552 | // |
---|
| 553 | tok.writetoken(locpointer); |
---|
| 554 | } |
---|
| 555 | file.close(); |
---|
| 556 | this->removelock(); |
---|
| 557 | return 0; |
---|
| 558 | } |
---|
| 559 | |
---|
| 560 | // |
---|
| 561 | // remove poolfile |
---|
| 562 | // |
---|
| 563 | int disparm::REMOVE() |
---|
| 564 | { |
---|
| 565 | if (this->getlock()!=0) |
---|
| 566 | { |
---|
| 567 | return 1; |
---|
| 568 | } |
---|
| 569 | this->removelock(); |
---|
| 570 | |
---|
| 571 | int rc = unlink(this->path_pool.c_str()); |
---|
| 572 | if (rc) |
---|
| 573 | { |
---|
| 574 | std::cerr << "Cannot remove " << this->path_pool << std::endl; |
---|
| 575 | return 1; |
---|
| 576 | } |
---|
| 577 | return 0; |
---|
| 578 | } |
---|
| 579 | |
---|
| 580 | // |
---|
| 581 | // return statistics about the pool |
---|
| 582 | // no wait for lock, so be careful interpretating the results |
---|
| 583 | // |
---|
| 584 | stats disparm::getstats() |
---|
| 585 | { |
---|
| 586 | stats statistics; |
---|
| 587 | token tok; |
---|
| 588 | std::fstream file; |
---|
| 589 | statistics.records = -1; |
---|
| 590 | statistics.committed = -1; |
---|
| 591 | statistics.ready = -1; |
---|
| 592 | statistics.commax = -1; |
---|
| 593 | |
---|
| 594 | |
---|
| 595 | file.open (this->path_pool.c_str(), std::fstream::in | std::fstream::out); |
---|
| 596 | |
---|
| 597 | if (file.is_open()) |
---|
| 598 | { |
---|
| 599 | tok.setfile(file); |
---|
| 600 | std::streampos pos = 0; |
---|
| 601 | std::streampos posused; |
---|
| 602 | std::streampos posnext; |
---|
| 603 | statistics.records = 0; |
---|
| 604 | statistics.committed = 0; |
---|
| 605 | statistics.ready = 0; |
---|
| 606 | statistics.commax = 0; |
---|
| 607 | |
---|
| 608 | while(1) |
---|
| 609 | { |
---|
| 610 | tok.readnext(pos, posused,posnext); |
---|
| 611 | if (pos != posused) |
---|
| 612 | break; |
---|
| 613 | if (tok.getready()) |
---|
| 614 | statistics.ready++; |
---|
| 615 | if (tok.getcommitted()>0) |
---|
| 616 | statistics.committed++; |
---|
| 617 | if (tok.getcommitted() > statistics.commax) |
---|
| 618 | statistics.commax = tok.getcommitted(); |
---|
| 619 | statistics.records++; |
---|
| 620 | pos = posnext; |
---|
| 621 | } |
---|
| 622 | } |
---|
| 623 | |
---|
| 624 | file.close(); |
---|
| 625 | return statistics; |
---|
| 626 | } |
---|
| 627 | |
---|
| 628 | int disparm::echounhandled(void) |
---|
| 629 | { |
---|
| 630 | token tok; |
---|
| 631 | std::fstream file; |
---|
| 632 | |
---|
| 633 | file.open (this->path_pool.c_str(), std::fstream::in | std::fstream::out); |
---|
| 634 | |
---|
| 635 | if (file.is_open()) |
---|
| 636 | { |
---|
| 637 | tok.setfile(file); |
---|
| 638 | std::streampos pos = 0; |
---|
| 639 | std::streampos posused; |
---|
| 640 | std::streampos posnext; |
---|
| 641 | std::cerr << "linenr:committed:value"<< std::endl; |
---|
| 642 | |
---|
| 643 | while(1) |
---|
| 644 | { |
---|
| 645 | tok.readnext(pos, posused,posnext); |
---|
| 646 | if (pos != posused) |
---|
| 647 | break; |
---|
| 648 | |
---|
| 649 | if (!tok.getready()&&tok.getcommitted()>0) |
---|
| 650 | { |
---|
| 651 | std::cerr << tok.getlinenr() << ":"<<tok.getcommitted()<<":" << tok.getvalue() << std::endl; |
---|
| 652 | } |
---|
| 653 | pos = posnext; |
---|
| 654 | } |
---|
| 655 | } |
---|
| 656 | else |
---|
| 657 | { |
---|
| 658 | std::cerr <<"Cannot open pool file '"<<this->path_pool<<"'"<<std::endl; |
---|
| 659 | return 1; |
---|
| 660 | } |
---|
| 661 | |
---|
| 662 | file.close(); |
---|
| 663 | return 0; |
---|
| 664 | } |
---|
| 665 | |
---|
| 666 | |
---|
| 667 | int disparm::remove_lock_and_links(const std::string path, const std::string dirl, const std::string path_lock, int timer) |
---|
| 668 | { |
---|
| 669 | // removes lock and hard links in directory "dirl" to file "path" |
---|
| 670 | // in directory "dir", if they are older than "time" seconds. |
---|
| 671 | // Method: |
---|
| 672 | // if lock is older than timer seconds, remove it. |
---|
| 673 | // and: |
---|
| 674 | // using readdir, examine all components of dirl and see |
---|
| 675 | // if they have the same inode as "path". If so, remove, unless |
---|
| 676 | // the realname is the same as the realname of "path" |
---|
| 677 | // |
---|
| 678 | DIR *pdir; |
---|
| 679 | struct dirent *pent; |
---|
| 680 | int rc; |
---|
| 681 | struct stat buf; |
---|
| 682 | |
---|
| 683 | pdir = opendir(dirl.c_str()); |
---|
| 684 | if (!pdir) |
---|
| 685 | { |
---|
| 686 | std::cerr << "Cannot read link directory '"<<dirl<<"'"<<std::endl; |
---|
| 687 | return 1; |
---|
| 688 | } |
---|
| 689 | // look if lock can be removed, if yes: and make it so |
---|
| 690 | rc = stat(path_lock.c_str(),&buf); |
---|
| 691 | if (rc == 0) |
---|
| 692 | { |
---|
| 693 | if (time(0) > buf.st_mtime + timer) |
---|
| 694 | { |
---|
| 695 | std::cerr << "Trying to remove '"<<path_lock<<"'"<<std::endl; |
---|
| 696 | rc = rmdir(path_lock.c_str()); |
---|
| 697 | // It could happen that rmdir failed, for example another process |
---|
| 698 | // already deleted it, or path is invalid etc. |
---|
| 699 | // We ignore this, relying on the fact that eventually |
---|
| 700 | // getlock will time out. |
---|
| 701 | } |
---|
| 702 | } |
---|
| 703 | rc = stat(path.c_str(),&buf); |
---|
| 704 | if (rc !=0) |
---|
| 705 | { |
---|
| 706 | std::cerr << "Cannot stat '"<<path<<"'"<<std::endl; |
---|
| 707 | return 1; |
---|
| 708 | } |
---|
| 709 | ino_t inodenr = buf.st_ino; |
---|
| 710 | char* rpathc = (char*)malloc(PATH_MAX+1); |
---|
| 711 | rpathc = realpath(path.c_str(),rpathc); |
---|
| 712 | std::string rpath = rpathc; |
---|
| 713 | std::string rpath1; |
---|
| 714 | |
---|
| 715 | while ((pent=readdir(pdir))) |
---|
| 716 | { |
---|
| 717 | struct stat buf; |
---|
| 718 | std::string name = pent->d_name; |
---|
| 719 | if (name == ".") continue; |
---|
| 720 | if (name == "..") continue; |
---|
| 721 | rpathc = realpath((dirl+"/"+name).c_str(),rpathc); |
---|
| 722 | rpath1 = rpathc; |
---|
| 723 | std::cerr<<"TD: looking at '"<<rpath1<<"'"<<std::endl; |
---|
| 724 | if (rpath != rpath1) |
---|
| 725 | { |
---|
| 726 | int rc = stat(rpath1.c_str(),&buf); |
---|
| 727 | if (rc != 0) |
---|
| 728 | { |
---|
| 729 | std::cerr<<"Cannot stat '"<<rpath1<<"'"<<" this cannot happen!" << std::endl; |
---|
| 730 | free(rpathc); |
---|
| 731 | return 1; |
---|
| 732 | } |
---|
| 733 | if (buf.st_ino == inodenr) |
---|
| 734 | { |
---|
| 735 | std::cerr << "time: " << time(0) << " " << buf.st_mtime << " " << timer << std::endl; |
---|
| 736 | if (time(0) > buf.st_mtime + timer) |
---|
| 737 | { |
---|
| 738 | int rc = unlink(rpath1.c_str()); |
---|
| 739 | if (rc == 0) |
---|
| 740 | std::cerr<<"Unlinked '"<<rpath1<<"'"<<std::endl; |
---|
| 741 | else |
---|
| 742 | std::cerr<<"Could not unlink '"<<rpath1<<"'"<<std::endl; |
---|
| 743 | } |
---|
| 744 | else |
---|
| 745 | std::cerr << "TD: not unlinking because time: '"<<rpath1<<"'"<<std::endl; |
---|
| 746 | } |
---|
| 747 | } |
---|
| 748 | else |
---|
| 749 | std::cerr<<"TD: not unlinking '"<<rpath1<<"'"<<std::endl; |
---|
| 750 | } |
---|
| 751 | free(rpathc); |
---|
| 752 | return 0; |
---|
| 753 | } |
---|
| 754 | |
---|
| 755 | |
---|
| 756 | // |
---|
| 757 | // remove lock and links |
---|
| 758 | // method: do a glob on baselinkfilename and unlink |
---|
| 759 | // the files. |
---|
| 760 | // |
---|
| 761 | // Only remove if links are older than 60 seconds. |
---|
| 762 | // |
---|
| 763 | void disparm::remove_lock_and_links() |
---|
| 764 | { |
---|
| 765 | if (this->debug) |
---|
| 766 | this->debugger("Before remove_lock_and_links:"); |
---|
| 767 | |
---|
| 768 | remove_lock_and_links(this->path_pool,this->path_lockdir,this->path_lock,60); |
---|
| 769 | if (this->debug) |
---|
| 770 | this->debugger("Before remove_lock_and_links:"); |
---|
| 771 | } |
---|
| 772 | |
---|
| 773 | void disparm::setdebug() |
---|
| 774 | { |
---|
| 775 | this->debug = 1; |
---|
| 776 | } |
---|
| 777 | void disparm::debugger(const std::string s) |
---|
| 778 | { |
---|
| 779 | std::cerr << s << std::endl; |
---|
| 780 | std::cerr << "baselinkfilename: '" << this->baselinkfilename << "'" << std::endl; |
---|
| 781 | std::cerr << "committed: '" << this->committed << "'" << std::endl; |
---|
| 782 | std::cerr << "committedname: '" << this->committedname << "'" << std::endl; |
---|
| 783 | std::cerr << "definputfilename: '" << this->definputfilename << "'" << std::endl; |
---|
| 784 | std::cerr << "defpath_pool: '" << this->defpath_pool << "'" << std::endl; |
---|
| 785 | std::cerr << "defpath_lockdir: '" << this->defpath_lockdir << "'" << std::endl; |
---|
| 786 | std::cerr << "inputfilename: '" << this->inputfilename << "'" << std::endl; |
---|
| 787 | std::cerr << "key: '" << this->key << "'" << std::endl; |
---|
| 788 | std::cerr << "keyname: '" << this->keyname << "'" << std::endl; |
---|
| 789 | std::cerr << "linename: '" << this->linename << "'" << std::endl; |
---|
| 790 | std::cerr << "linenr: '" << this->linenr << "'" << std::endl; |
---|
| 791 | std::cerr << "lockname: '" << this->lockname << "'" << std::endl; |
---|
| 792 | std::cerr << "maxiter: '" << this->maxiter << "'" << std::endl; |
---|
| 793 | std::cerr << "path_link: '" << this->path_link << "'" << std::endl; |
---|
| 794 | std::cerr << "path_lock: '" << this->path_lock << "'" << std::endl; |
---|
| 795 | std::cerr << "path_lockdir: '" << this->path_lockdir << "'" << std::endl; |
---|
| 796 | std::cerr << "path_pool: '" << this->path_pool << "'" << std::endl; |
---|
| 797 | std::cerr << "pmarker: '" << this->pmarker << "'" << std::endl; |
---|
| 798 | std::cerr << "pmarkerlen: '" << this->pmarkerlen << "'" << std::endl; |
---|
| 799 | std::cerr << "pointerlen: '" << this->pointerlen << "'" << std::endl; |
---|
| 800 | std::cerr << "rc: '" << this->rc << "'" << std::endl; |
---|
| 801 | std::cerr << "rcname: '" << this->rcname << "'" << std::endl; |
---|
| 802 | std::cerr << "shelltype: '" << this->shelltype << "'" << std::endl; |
---|
| 803 | std::cerr << "status: '" << this->status << "'" << std::endl; |
---|
| 804 | std::cerr << "value: '" << this->value << "'" << std::endl; |
---|
| 805 | std::cerr << "valuename: '" << this->valuename << "'" << std::endl; |
---|
| 806 | } |
---|
| 807 | |
---|
| 808 | // |
---|
| 809 | // Just to teach me again how to make an object |
---|
| 810 | // suitable for the << operator |
---|
| 811 | // |
---|
| 812 | std::ostream& operator <<(std::ostream &os,disparm &obj) |
---|
| 813 | { |
---|
| 814 | stats sta; |
---|
| 815 | sta = obj.getstats(); |
---|
| 816 | os << "Total: " << sta.records << "\n" |
---|
| 817 | << "Committed: " << sta.committed << "\n" |
---|
| 818 | << "Ready: " << sta.ready << "\n" |
---|
| 819 | << "Max: " << sta.commax; |
---|
| 820 | return os; |
---|
| 821 | } |
---|
| 822 | |
---|