110 lines
2.3 KiB
C
110 lines
2.3 KiB
C
#include <stdbool.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "comm.h"
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#include "log.h"
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#include "swaylock.h"
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#include "password-buffer.h"
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static int comm[2][2] = {{-1, -1}, {-1, -1}};
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ssize_t read_comm_request(char **buf_ptr) {
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size_t size;
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ssize_t amt;
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amt = read(comm[0][0], &size, sizeof(size));
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if (amt == 0) {
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return 0;
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} else if (amt < 0) {
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swaylock_log_errno(LOG_ERROR, "read pw request");
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return -1;
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}
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swaylock_log(LOG_DEBUG, "received pw check request");
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char *buf = password_buffer_create(size);
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if (!buf) {
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return -1;
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}
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size_t offs = 0;
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do {
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amt = read(comm[0][0], &buf[offs], size - offs);
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if (amt <= 0) {
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swaylock_log_errno(LOG_ERROR, "failed to read pw");
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return -1;
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}
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offs += (size_t)amt;
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} while (offs < size);
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*buf_ptr = buf;
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return size;
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}
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bool write_comm_reply(struct comm_reply reply) {
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if (write(comm[1][1], &reply, sizeof(reply)) != sizeof(reply)) {
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swaylock_log_errno(LOG_ERROR, "failed to write pw check result");
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return false;
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}
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return true;
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}
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bool spawn_comm_child(void) {
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if (pipe(comm[0]) != 0) {
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swaylock_log_errno(LOG_ERROR, "failed to create pipe");
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return false;
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}
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if (pipe(comm[1]) != 0) {
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swaylock_log_errno(LOG_ERROR, "failed to create pipe");
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return false;
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}
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pid_t child = fork();
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if (child < 0) {
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swaylock_log_errno(LOG_ERROR, "failed to fork");
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return false;
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} else if (child == 0) {
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close(comm[0][1]);
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close(comm[1][0]);
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run_pw_backend_child();
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}
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close(comm[0][0]);
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close(comm[1][1]);
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return true;
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}
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bool write_comm_request(struct swaylock_password *pw) {
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bool result = false;
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size_t len = pw->len + 1;
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size_t offs = 0;
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if (write(comm[0][1], &len, sizeof(len)) < 0) {
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swaylock_log_errno(LOG_ERROR, "Failed to request pw check");
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goto out;
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}
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do {
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ssize_t amt = write(comm[0][1], &pw->buffer[offs], len - offs);
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if (amt < 0) {
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swaylock_log_errno(LOG_ERROR, "Failed to write pw buffer");
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goto out;
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}
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offs += amt;
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} while (offs < len);
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result = true;
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out:
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clear_password_buffer(pw);
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return result;
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}
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struct comm_reply read_comm_reply(void) {
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struct comm_reply result;
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if (read(comm[1][0], &result, sizeof(result)) != sizeof(result)) {
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swaylock_log_errno(LOG_ERROR, "Failed to read pw result");
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result.kind = REPLY_AUTH_ERR;
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}
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return result;
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}
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int get_comm_reply_fd(void) {
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return comm[1][0];
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}
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