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63 lines
1.4 KiB
63 lines
1.4 KiB
#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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int main(int argc, char *argv[]) {
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char buf[1024];
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ssize_t r;
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if (argc != 2) {
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fprintf(stderr, "Write to and read from a Unix domain socket.\n\nUsage: %s <socket>\n", argv[0]);
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return 1;
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}
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size_t addrlen = strlen(argv[1]);
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/* Allocate enough space for arbitrary-length paths */
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char addrbuf[offsetof(struct sockaddr_un, sun_path) + addrlen + 1];
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memset(addrbuf, 0, sizeof(addrbuf));
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struct sockaddr_un *addr = (struct sockaddr_un *)addrbuf;
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addr->sun_family = AF_UNIX;
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memcpy(addr->sun_path, argv[1], addrlen+1);
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int fd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (fd < 0) {
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fprintf(stderr, "Failed to create socket: %s\n", strerror(errno));
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return 1;
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}
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if (connect(fd, (struct sockaddr*)addr, sizeof(addrbuf)) < 0) {
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fprintf(stderr, "Can't connect to `%s': %s\n", argv[1], strerror(errno));
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return 1;
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}
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/* Check if stdin refers to a terminal */
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if (!isatty(fileno(stdin))) {
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/* Read from stdin and write to socket */
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while (0 < (r = fread(buf, 1, sizeof(buf), stdin))) {
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send(fd, buf, r, 0);
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}
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}
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/* Read from socket and write to stdout */
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while (1) {
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r = recv(fd, buf, sizeof(buf), 0);
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if (r < 0) {
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fprintf(stderr, "read: %s\n", strerror(errno));
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return 1;
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}
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if (r == 0)
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return 0;
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fwrite(buf, r, 1, stdout);
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}
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return 0;
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}
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