X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=src%2Fcommon%2Futils.c;h=31596ddd36c3a3314daa2de1db6db19690b7800a;hb=fb198a1138d32ac7218695c564909d96018eb1b7;hp=ea1e5db0ee31dd192d7661dd2537f9a9c5c30298;hpb=00c76ceaeb0074e47167be56c0920284e6a0360e;p=lttng-tools.git

diff --git a/src/common/utils.c b/src/common/utils.c
index ea1e5db0e..31596ddd3 100644
--- a/src/common/utils.c
+++ b/src/common/utils.c
@@ -30,6 +30,7 @@
 #include <inttypes.h>
 #include <regex.h>
 #include <grp.h>
+#include <pwd.h>
 
 #include <common/common.h>
 #include <common/runas.h>
@@ -854,6 +855,46 @@ char *utils_get_home_dir(void)
 	return getenv(DEFAULT_LTTNG_FALLBACK_HOME_ENV_VAR);
 }
 
+/**
+ * Get user's home directory. Dynamically allocated, must be freed
+ * by the caller.
+ */
+LTTNG_HIDDEN
+char *utils_get_user_home_dir(uid_t uid)
+{
+	struct passwd pwd;
+	struct passwd *result;
+	char *home_dir = NULL;
+	char *buf = NULL;
+	long buflen;
+	int ret;
+
+	buflen = sysconf(_SC_GETPW_R_SIZE_MAX);
+	if (buflen == -1) {
+		goto end;
+	}
+retry:
+	buf = zmalloc(buflen);
+	if (!buf) {
+		goto end;
+	}
+
+	ret = getpwuid_r(uid, &pwd, buf, buflen, &result);
+	if (ret || !result) {
+		if (ret == ERANGE) {
+			free(buf);
+			buflen *= 2;
+			goto retry;
+		}
+		goto end;
+	}
+
+	home_dir = strdup(pwd.pw_dir);
+end:
+	free(buf);
+	return home_dir;
+}
+
 /*
  * With the given format, fill dst with the time of len maximum siz.
  *