1 files changed, 55 insertions, 0 deletions
diff --git a/print-contact.c b/print-contact.c
new file mode 100644
index 0000000..7a9b92e
--- /dev/null
+++ b/print-contact.c
@@ -0,0 +1,55 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+USAGE("contact-id");
+
+
+int
+main(int argc, char *argv[])
+{
+	char buf[BUFSIZ];
+	struct passwd *user;
+	char *path;
+	ssize_t r;
+	size_t n, p;
+	int fd;
+
+	NOFLAGS(argc != 1);
+
+	if (!*argv[0] || strchr(argv[0], '/'))
+		usage();
+
+	errno = 0;
+	user = getpwuid(getuid());
+	if (!user)
+		eprintf("getpwuid: %s\n", errno ? strerror(errno) : "user does not exist");
+
+	path = libcontacts_get_path(argv[0], user);
+	if (!path)
+		eprintf("libcontacts_get_path %s:", argv[0]);
+
+	fd = open(path, O_RDONLY);
+	if (fd < 0)
+		eprintf("open %s O_RDONLY:", path);
+
+	for (;;) {
+		r = read(fd, buf, sizeof(buf));
+		if (r <= 0) {
+			if (!r)
+				break;
+			eprintf("read %s:", path);
+		}
+		n = (size_t)r;
+		for (p = 0; p < n; p += (size_t)r) {
+			r = write(STDOUT_FILENO, &buf[p], n - p);
+			if (r <= 0)
+				eprintf("write <stdout>:");
+		}
+	}
+
+	if (fflush(stdout) || ferror(stdout) || fclose(stdout))
+		eprintf("printf:");
+	close(fd);
+	free(path);
+	return 0;
+}