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* Wrapper class around pids.

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This commit is contained in:
Eelco Dolstra 2004-06-22 09:51:44 +00:00
parent 155d7c8dfa
commit c9fbd2dfd5
4 changed files with 162 additions and 87 deletions
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24
src/libstore/store.cc
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@ -127,21 +127,22 @@ void copyPath(const Path & src, const Path & dst)
use a thread). */
/* Create a pipe. */
int fds[2];
if (pipe(fds) == -1) throw SysError("creating pipe");
Pipe pipe;
pipe.create();
/* Fork. */
pid_t pid;
switch (pid = fork()) {
Pid pid;
pid = fork();
switch (pid) {
case -1:
throw SysError("unable to fork");
case 0: /* child */
try {
close(fds[1]);
pipe.writeSide.close();
CopySource source;
source.fd = fds[0];
source.fd = pipe.readSide;
restorePath(dst, source);
_exit(0);
} catch (exception & e) {
@ -150,19 +151,16 @@ void copyPath(const Path & src, const Path & dst)
_exit(1);
}
close(fds[0]);
/* Parent. */
pipe.readSide.close();
CopySink sink;
sink.fd = fds[1];
sink.fd = pipe.writeSide;
dumpPath(src, sink);
/* Wait for the child to finish. */
int status;
if (waitpid(pid, &status, 0) != pid)
throw SysError("waiting for child");
int status = pid.wait(true);
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
throw Error(format("cannot copy `%1% to `%2%': child %3%")
% src % dst % statusToString(status));