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authorKay Sievers <kay@vrfy.org>2012-07-14 00:32:47 +0200
committerKay Sievers <kay@vrfy.org>2012-07-14 00:33:59 +0200
commitc6eefe366470e1cf6c94f52dd923dc822eb5d027 (patch)
tree119a52b2b185274f6890acc9d4f89de8a6b4b54d /src/libudev/libudev-util.c
parent95694951a0905dd748c6902268b15e3a56632da2 (diff)
udev: avoid creating /dev/kmsg with fopen() to support CONFIG_PRINTK=n
Diffstat (limited to 'src/libudev/libudev-util.c')
-rw-r--r--src/libudev/libudev-util.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/src/libudev/libudev-util.c b/src/libudev/libudev-util.c
index 8e6d5b621d..e2fb449d64 100644
--- a/src/libudev/libudev-util.c
+++ b/src/libudev/libudev-util.c
@@ -727,3 +727,28 @@ unsigned long long now_usec(void)
return 0;
return ts_usec(&ts);
}
+
+ssize_t print_kmsg(const char *fmt, ...)
+{
+ int fd;
+ va_list ap;
+ char text[1024];
+ ssize_t len;
+ ssize_t ret;
+
+ fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return -errno;
+
+ len = snprintf(text, sizeof(text), "<30>systemd-udevd[%u]: ", getpid());
+
+ va_start(ap, fmt);
+ len += vsnprintf(text + len, sizeof(text) - len, fmt, ap);
+ va_end(ap);
+
+ ret = write(fd, text, len);
+ if (ret < 0)
+ ret = -errno;
+ close(fd);
+ return ret;
+}