First commit

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 83 insertions, 0 deletions

diff --git a/libexec_get_documents.c b/libexec_get_documents.c
new file mode 100644
index 0000000..2bdadf8
--- /dev/null
+++ b/libexec_get_documents.c
@@ -0,0 +1,83 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+int
+libexec_get_documents(struct libexec_command *cmd, struct libexec_document **docsp, size_t *ndocsp, int flags)
+{
+	typedef int fdpair[2];
+	size_t i, j, n;
+	void *new;
+	fdpair *pipes;
+	int error;
+	int fd_flags, fl_flags;
+
+	if (!cmd || !docsp || !ndocsp) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	fd_flags = (flags & O_CLOEXEC);
+	fl_flags = (flags ^ fd_flags);
+	if (fd_flags)
+		fd_flags = FD_CLOEXEC;
+
+	n = 0;
+	for (i = 0; i < cmd->nplumings; i++)
+		if (cmd->plumings[i].type == LIBEXEC_PLUMING_DOCUMENT)
+			n += 1;
+
+	pipes = malloc(n * sizeof(*pipes));
+	if (!pipes)
+		return -1;
+
+	j = 0;
+	for (i = 0; i < cmd->nplumings; i++) {
+		if (cmd->plumings[i].type == LIBEXEC_PLUMING_DOCUMENT) {
+			if (pipe(pipes[j]))
+				goto fail;
+			j++;
+			if (fd_flags && fcntl(pipes[j - 1][1], F_SETFD, fd_flags))
+				goto fail;
+			if (fl_flags && fcntl(pipes[j - 1][1], F_SETFL, fl_flags))
+				goto fail;
+		}
+	}
+
+	new = realloc(*docsp, (*ndocsp + n) * sizeof(**docsp));
+	if (!new)
+		goto fail;
+	*docsp = new;
+
+	for (i = 0, j = 0; i < cmd->nplumings; i++) {
+		if (cmd->plumings[i].type != LIBEXEC_PLUMING_DOCUMENT)
+			continue;
+		(*docsp)[j].user = 0;
+		(*docsp)[j].fd = pipes[j][1];
+		(*docsp)[j].text = cmd->plumings[i].target.text;
+		(*docsp)[j].length = cmd->plumings[i].target.len;
+		(*docsp)[j].offset = 0;
+		cmd->plumings[i].target.fd = pipes[j][0];
+		cmd->plumings[i].type = LIBEXEC_PLUMING_PIPE;
+		j++;
+	}
+
+	free(pipes);
+	return 0;
+
+fail:
+	error = errno;
+	while (j--) {
+		close(pipes[j][0]);
+		close(pipes[j][1]);
+	}
+	free(pipes);
+	errno = error;
+	return -1;
+}
+
+
+#else
+LIBEXEC_CONST__ int main(void) {return 0;} /* TODO test */
+#endif