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module/backlight: handle poll() failures

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Daniel Eklöf 2021-12-17 11:23:59 +01:00
parent f71e7c2905
commit 6612a9af9f
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1 changed files with 13 additions and 3 deletions
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16
modules/backlight.c
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@ -4,6 +4,7 @@
#include <math.h> #include <math.h>
#include <assert.h> #include <assert.h>
#include <unistd.h> #include <unistd.h>
#include <errno.h>
#include <poll.h> #include <poll.h>
#include <sys/stat.h> #include <sys/stat.h>
@ -178,15 +179,24 @@ run(struct module *mod)
bar->refresh(bar); bar->refresh(bar);
int ret = 1;
while (true) { while (true) {
struct pollfd fds[] = { struct pollfd fds[] = {
{.fd = mod->abort_fd, .events = POLLIN}, {.fd = mod->abort_fd, .events = POLLIN},
{.fd = udev_monitor_get_fd(mon), .events = POLLIN}, {.fd = udev_monitor_get_fd(mon), .events = POLLIN},
}; };
poll(fds, 2, -1); if (poll(fds, sizeof(fds) / sizeof(fds[0]), -1) < 0) {
if (errno == EINTR)
continue;
if (fds[0].revents & POLLIN) LOG_ERRNO("failed to poll");
break; break;
}
if (fds[0].revents & POLLIN) {
ret = 0;
break;
}
struct udev_device *dev = udev_monitor_receive_device(mon); struct udev_device *dev = udev_monitor_receive_device(mon);
if (dev == NULL) if (dev == NULL)
@ -209,7 +219,7 @@ run(struct module *mod)
udev_unref(udev); udev_unref(udev);
close(current_fd); close(current_fd);
return 0; return ret;
} }
static struct module * static struct module *