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authorLennart Poettering <lennart@poettering.net>2012-12-25 16:29:51 +0100
committerLennart Poettering <lennart@poettering.net>2012-12-31 21:24:26 +0100
commit240dbaa44f8e5ad51775c776fc3ce9cd2f19f037 (patch)
tree607e02cd59aef350e3b32698742cd1e00bc71d7c /src/shared/util.c
parent3ec90c030081111900597ec5475d880893f10a76 (diff)
unit: add ConditionACPower=
Diffstat (limited to 'src/shared/util.c')
-rw-r--r--src/shared/util.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/src/shared/util.c b/src/shared/util.c
index 1779625c77..3f00db7f2c 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -5763,3 +5763,81 @@ char *strip_tab_ansi(char **ibuf, size_t *_isz) {
return obuf;
}
+
+int on_ac_power(void) {
+ bool found_offline = false, found_online = false;
+ _cleanup_closedir_ DIR *d = NULL;
+
+ d = opendir("/sys/class/power_supply");
+ if (!d)
+ return -errno;
+
+ for (;;) {
+ struct dirent *de;
+ union dirent_storage buf;
+ _cleanup_free_ char *p = NULL;
+ _cleanup_close_ int fd = -1, device = -1;
+ char contents[6];
+ ssize_t n;
+ int k;
+
+ k = readdir_r(d, &buf.de, &de);
+ if (k != 0)
+ return -k;
+
+ if (!de)
+ break;
+
+ if (ignore_file(de->d_name))
+ continue;
+
+ device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY);
+ if (device < 0) {
+ if (errno == ENOENT || errno == ENOTDIR)
+ continue;
+
+ return -errno;
+ }
+
+ fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY);
+ if (fd < 0) {
+ if (errno == ENOENT)
+ continue;
+
+ return -errno;
+ }
+
+ n = read(fd, contents, sizeof(contents));
+ if (n < 0)
+ return -errno;
+
+ if (n != 6 || memcmp(contents, "Mains\n", 6))
+ continue;
+
+ close_nointr_nofail(fd);
+ fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY);
+ if (fd < 0) {
+ if (errno == ENOENT)
+ continue;
+
+ return -errno;
+ }
+
+ n = read(fd, contents, sizeof(contents));
+ if (n < 0)
+ return -errno;
+
+ if (n != 2 || contents[1] != '\n')
+ return -EIO;
+
+ if (contents[0] == '1') {
+ found_online = true;
+ break;
+ } else if (contents[0] == '0')
+ found_offline = true;
+ else
+ return -EIO;
+ }
+
+ return found_online || !found_offline;
+}