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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:06:34 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:06:34 +0000 |
commit | 5e61585d76ae77fd5e9e96ebabb57afa4d74880d (patch) | |
tree | 2b467823aaeebc7ef8bc9e3cabe8074eaef1666d /src/util/stream_send_fd.c | |
parent | Initial commit. (diff) | |
download | postfix-upstream/3.5.24.tar.xz postfix-upstream/3.5.24.zip |
Adding upstream version 3.5.24.upstream/3.5.24upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/util/stream_send_fd.c')
-rw-r--r-- | src/util/stream_send_fd.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/util/stream_send_fd.c b/src/util/stream_send_fd.c new file mode 100644 index 0000000..0a9aebf --- /dev/null +++ b/src/util/stream_send_fd.c @@ -0,0 +1,115 @@ +/*++ +/* NAME +/* stream_send_fd 3 +/* SUMMARY +/* send file descriptor +/* SYNOPSIS +/* #include <iostuff.h> +/* +/* int stream_send_fd(fd, sendfd) +/* int fd; +/* int sendfd; +/* DESCRIPTION +/* stream_send_fd() sends a file descriptor over the specified +/* stream. +/* +/* Arguments: +/* .IP fd +/* File descriptor that connects the sending and receiving processes. +/* .IP sendfd +/* The file descriptor to be sent. +/* DIAGNOSTICS +/* stream_send_fd() returns -1 upon failure. +/* LICENSE +/* .ad +/* .fi +/* The Secure Mailer license must be distributed with this software. +/* AUTHOR(S) +/* Wietse Venema +/* IBM T.J. Watson Research +/* P.O. Box 704 +/* Yorktown Heights, NY 10598, USA +/*--*/ + +/* System library. */ + +#include <sys_defs.h> /* includes <sys/types.h> */ + +#ifdef STREAM_CONNECTIONS + +#include <sys/stat.h> +#include <unistd.h> +#include <fcntl.h> +#include <errno.h> +#include <stropts.h> + +#endif + +/* Utility library. */ + +#include <msg.h> +#include <iostuff.h> + +/* stream_send_fd - send file descriptor */ + +int stream_send_fd(int fd, int sendfd) +{ +#ifdef STREAM_CONNECTIONS + const char *myname = "stream_send_fd"; + + if (ioctl(fd, I_SENDFD, sendfd) < 0) + msg_fatal("%s: send file descriptor %d: %m", myname, sendfd); + return (0); +#else + msg_fatal("stream connections are not implemented"); +#endif +} + +#ifdef TEST + + /* + * Proof-of-concept program. Open a file and send the descriptor, presumably + * to the stream_recv_fd test program. + */ +#include <unistd.h> +#include <fcntl.h> +#include <string.h> +#include <stdlib.h> +#include <split_at.h> +#include <connect.h> + +int main(int argc, char **argv) +{ + char *transport; + char *endpoint; + char *path; + int server_sock; + int client_fd; + + if (argc < 3 + || (endpoint = split_at(transport = argv[1], ':')) == 0 + || *endpoint == 0 || *transport == 0) + msg_fatal("usage: %s transport:endpoint file...", argv[0]); + + if (strcmp(transport, "stream") == 0) { + server_sock = stream_connect(endpoint, BLOCKING, 0); + } else { + msg_fatal("invalid transport name: %s", transport); + } + if (server_sock < 0) + msg_fatal("connect %s:%s: %m", transport, endpoint); + + argv += 2; + while ((path = *argv++) != 0) { + if ((client_fd = open(path, O_RDONLY, 0)) < 0) + msg_fatal("open %s: %m", path); + msg_info("path=%s client_fd=%d", path, client_fd); + if (stream_send_fd(server_sock, client_fd) < 0) + msg_fatal("send file descriptor: %m"); + if (close(client_fd) != 0) + msg_fatal("close(%d): %m", client_fd); + } + exit(0); +} + +#endif |