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authorLennart Poettering <lennart@poettering.net>2011-04-16 02:02:54 +0200
committerLennart Poettering <lennart@poettering.net>2011-04-16 02:03:35 +0200
commit7640a5de1b3ffe6547200ad204d14e4f067caf4f (patch)
tree230ab4d99226ac63fa17daa1428c490ee37912ad /src/util.c
parent25e3655a00ba41424c95222aba71c543e84fd3e3 (diff)
hostnamed: introduce systemd-hostnamed
http://www.freedesktop.org/wiki/Software/systemd/hostnamed
Diffstat (limited to 'src/util.c')
-rw-r--r--src/util.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/src/util.c b/src/util.c
index bec6e0c8e8..c2173c7222 100644
--- a/src/util.c
+++ b/src/util.c
@@ -496,6 +496,64 @@ int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
return 0;
}
+int get_starttime_of_pid(pid_t pid, unsigned long long *st) {
+ int r;
+ FILE *f;
+ char fn[PATH_MAX], line[LINE_MAX], *p;
+
+ assert(pid > 0);
+ assert(st);
+
+ assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1));
+ char_array_0(fn);
+
+ if (!(f = fopen(fn, "r")))
+ return -errno;
+
+ if (!(fgets(line, sizeof(line), f))) {
+ r = -errno;
+ fclose(f);
+ return r;
+ }
+
+ fclose(f);
+
+ /* Let's skip the pid and comm fields. The latter is enclosed
+ * in () but does not escape any () in its value, so let's
+ * skip over it manually */
+
+ if (!(p = strrchr(line, ')')))
+ return -EIO;
+
+ p++;
+
+ if (sscanf(p, " "
+ "%*c " /* state */
+ "%*d " /* ppid */
+ "%*d " /* pgrp */
+ "%*d " /* session */
+ "%*d " /* tty_nr */
+ "%*d " /* tpgid */
+ "%*u " /* flags */
+ "%*u " /* minflt */
+ "%*u " /* cminflt */
+ "%*u " /* majflt */
+ "%*u " /* cmajflt */
+ "%*u " /* utime */
+ "%*u " /* stime */
+ "%*d " /* cutime */
+ "%*d " /* cstime */
+ "%*d " /* priority */
+ "%*d " /* nice */
+ "%*d " /* num_threads */
+ "%*d " /* itrealvalue */
+ "%llu " /* starttime */,
+ st) != 1)
+ return -EIO;
+
+ return 0;
+}
+
int write_one_line_file(const char *fn, const char *line) {
FILE *f;
int r;
@@ -776,6 +834,29 @@ finish:
return r;
}
+int write_env_file(const char *fname, char **l) {
+
+ char **i;
+ FILE *f;
+ int r;
+
+ f = fopen(fname, "we");
+ if (!f)
+ return -errno;
+
+ STRV_FOREACH(i, l) {
+ fputs(*i, f);
+ fputc('\n', f);
+ }
+
+ fflush(f);
+
+ r = ferror(f) ? -errno : 0;
+ fclose(f);
+
+ return r;
+}
+
char *truncate_nl(char *s) {
assert(s);