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gamma-control-v1: improve error handling

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This commit is contained in:
emersion 2018-07-29 17:51:27 +01:00
parent bbd0fbe573
commit c3afe4f42e
1 changed files with 10 additions and 11 deletions
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21
types/wlr_gamma_control_v1.c
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@ -67,22 +67,15 @@ static void gamma_control_handle_set_gamma(struct wl_client *client,
uint32_t ramp_size = wlr_output_get_gamma_size(gamma_control->output);
size_t table_size = ramp_size * 3 * sizeof(uint16_t);
off_t fd_size = lseek(fd, 0, SEEK_END);
// Skip checks if kernel does no support seek on buffer
if (fd_size != -1 && (size_t)fd_size != table_size) {
wl_resource_post_error(gamma_control_resource,
ZWLR_GAMMA_CONTROL_V1_ERROR_INVALID_GAMMA,
"The gamma ramps don't have the correct size");
goto error_fd;
}
lseek(fd, 0, SEEK_SET);
// Refuse to block when reading
int fd_flags = fcntl(fd, F_GETFL, 0);
if (fd_flags == -1) {
wlr_log_errno(WLR_ERROR, "failed to get FD flags");
gamma_control_send_failed(gamma_control);
goto error_fd;
}
if (fcntl(fd, F_SETFL, fd_flags | O_NONBLOCK) == -1) {
wlr_log_errno(WLR_ERROR, "failed to set FD flags");
gamma_control_send_failed(gamma_control);
goto error_fd;
}
@ -95,9 +88,15 @@ static void gamma_control_handle_set_gamma(struct wl_client *client,
}
ssize_t n_read = read(fd, table, table_size);
if (n_read == -1 || (size_t)n_read != table_size) {
if (n_read < 0) {
wlr_log_errno(WLR_ERROR, "failed to read gamma table");
gamma_control_send_failed(gamma_control);
goto error_table;
} else if ((size_t)n_read != table_size) {
wl_resource_post_error(gamma_control_resource,
ZWLR_GAMMA_CONTROL_V1_ERROR_INVALID_GAMMA,
"The gamma ramps don't have the correct size");
goto error_table;
}
close(fd);
fd = -1;