84 lines
1.8 KiB
C++
84 lines
1.8 KiB
C++
#include <iostream>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <dirent.h>
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#include "util.hh"
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string thisSystem = SYSTEM;
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SysError::SysError(string msg)
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{
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char * sysMsg = strerror(errno);
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err = msg + ": " + sysMsg;
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}
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string absPath(string path, string dir)
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{
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if (path[0] != '/') {
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if (dir == "") {
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char buf[PATH_MAX];
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if (!getcwd(buf, sizeof(buf)))
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throw SysError("cannot get cwd");
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dir = buf;
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}
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path = dir + "/" + path;
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/* !!! canonicalise */
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char resolved[PATH_MAX];
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if (!realpath(path.c_str(), resolved))
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throw SysError("cannot canonicalise path " + path);
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path = resolved;
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}
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return path;
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}
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string dirOf(string path)
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{
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unsigned int pos = path.rfind('/');
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if (pos == string::npos) throw Error("invalid file name: " + path);
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return string(path, 0, pos);
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}
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string baseNameOf(string path)
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{
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unsigned int pos = path.rfind('/');
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if (pos == string::npos) throw Error("invalid file name: " + path);
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return string(path, pos + 1);
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}
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void deletePath(string path)
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{
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struct stat st;
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if (lstat(path.c_str(), &st))
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throw SysError("getting attributes of path " + path);
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if (S_ISDIR(st.st_mode)) {
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DIR * dir = opendir(path.c_str());
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struct dirent * dirent;
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while (errno = 0, dirent = readdir(dir)) {
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string name = dirent->d_name;
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if (name == "." || name == "..") continue;
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deletePath(path + "/" + name);
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}
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closedir(dir); /* !!! close on exception */
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}
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if (remove(path.c_str()) == -1)
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throw SysError("cannot unlink " + path);
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}
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void debug(const format & f)
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{
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cerr << format("debug: %1%\n") % f.str();
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}
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