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#include <dirent.h>
#include <unistd.h>
#include <fcntl.h>
#include <pwd.h>
#include <grp.h>
#include "TestSupport.h"
namespace TestSupport {
void createServerInstanceDirAndGeneration(ServerInstanceDirPtr &serverInstanceDir,
ServerInstanceDir::GenerationPtr &generation)
{
serverInstanceDir.reset(new ServerInstanceDir(getpid()));
generation = serverInstanceDir->newGeneration(geteuid() == 0,
"nobody", getPrimaryGroupName("nobody"),
geteuid(), getegid());
}
string
readAll(const string &filename) {
FILE *f = fopen(filename.c_str(), "rb");
if (f != NULL) {
try {
string result = readAll(fileno(f));
fclose(f);
return result;
} catch (...) {
fclose(f);
throw;
}
} else {
int e = errno;
throw FileSystemException("Cannot open '" + filename + "' for reading",
e, filename);
}
}
string
readAll(int fd) {
string result;
char buf[1024 * 32];
ssize_t ret;
while (true) {
do {
ret = read(fd, buf, sizeof(buf));
} while (ret == -1 && errno == EINTR);
if (ret == 0) {
break;
} else if (ret == -1) {
throw SystemException("Cannot read from socket", errno);
} else {
result.append(buf, ret);
}
}
return result;
}
void
writeUntilFull(int fd) {
int flags, ret;
char buf[1024];
memset(buf, 0, sizeof(buf));
flags = fcntl(fd, F_GETFL);
fcntl(fd, F_SETFL, flags | O_NONBLOCK);
while (true) {
ret = write(fd, buf, sizeof(buf));
if (ret == -1) {
int e = errno;
if (e == EAGAIN) {
break;
} else {
throw SystemException("write() failed", e);
}
}
}
while (true) {
ret = write(fd, buf, 50);
if (ret == -1) {
int e = errno;
if (e == EAGAIN) {
break;
} else {
throw SystemException("write() failed", e);
}
}
}
while (true) {
ret = write(fd, buf, 1);
if (ret == -1) {
int e = errno;
if (e == EAGAIN) {
break;
} else {
throw SystemException("write() failed", e);
}
}
}
fcntl(fd, F_SETFL, flags);
}
string
replaceString(const string &str, const string &toFind, const string &replaceWith) {
string::size_type pos = str.find(toFind);
if (pos == string::npos) {
return str;
} else {
string result(str);
return result.replace(pos, toFind.size(), replaceWith);
}
}
void
replaceStringInFile(const char *filename, const string &toFind, const string &replaceWith) {
FILE *f = fopen(filename, "r");
if (f == NULL) {
int e = errno;
string message = "Cannot open file '";
message.append(filename);
message.append("' for reading");
throw FileSystemException(message, e, filename);
}
string content(readAll(fileno(f)));
fclose(f);
f = fopen(filename, "w");
if (f == NULL) {
int e = errno;
string message = "Cannot open file '";
message.append(filename);
message.append("' for writing");
throw FileSystemException(message, e, filename);
}
content = replaceString(content, toFind, replaceWith);
fwrite(content.data(), 1, content.size(), f);
fclose(f);
}
void
writeFile(const string &filename, const string &contents) {
FILE *f = fopen(filename.c_str(), "w");
if (f == NULL) {
int e = errno;
string message = "Cannot open file '";
message.append(filename);
message.append("' for writing");
throw FileSystemException(message, e, filename);
}
fwrite(contents.data(), 1, contents.size(), f);
fclose(f);
}
void
touchFile(const char *filename, time_t timestamp) {
FILE *f = fopen(filename, "a");
if (f != NULL) {
fclose(f);
} else if (errno != EISDIR) {
int e = errno;
string message = "Cannot touch file '";
message.append(filename);
message.append("'");
throw FileSystemException(message, e, filename);
}
if (timestamp != (time_t) -1) {
struct utimbuf times;
times.actime = timestamp;
times.modtime = timestamp;
utime(filename, ×);
}
}
vector<string>
listDir(const string &path) {
vector<string> result;
DIR *d = opendir(path.c_str());
struct dirent *ent;
if (d == NULL) {
int e = errno;
throw FileSystemException("Cannot open directory " + path,
e, path);
}
while ((ent = readdir(d)) != NULL) {
if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) {
continue;
}
result.push_back(ent->d_name);
}
return result;
}
string
getPrimaryGroupName(const string &username) {
struct passwd *user;
struct group *group;
user = getpwnam(username.c_str());
if (user == NULL) {
throw RuntimeException(string("User '") + username + "' does not exist.");
}
group = getgrgid(user->pw_gid);
if (group == NULL) {
throw RuntimeException(string("Primary group for user '") + username + "' does not exist.");
}
return group->gr_name;
}
} // namespace TestSupport
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