systemd-detect-virt: detect s390 virtualization

[elogind.git] / src / shared / strv.c

diff --git a/src/shared/strv.c b/src/shared/strv.c
index 13deba7be7780a7978d52d22b5e998a427af15f5..b4c476eff27df9858698ad4f52e66210b6696bb7 100644 (file)
--- a/src/shared/strv.c
+++ b/src/shared/strv.c
@@ -378,9 +378,52 @@ int strv_push(char ***l, char *value) {
         return 0;
 }
 
+int strv_push_prepend(char ***l, char *value) {
+        char **c;
+        unsigned n, i;
+
+        if (!value)
+                return 0;
+
+        n = strv_length(*l);
+        c = new(char*, n + 2);
+        if (!c)
+                return -ENOMEM;
+
+        for (i = 0; i < n; i++)
+                c[i+1] = (*l)[i];
+
+        c[0] = value;
+        c[n+1] = NULL;
+
+        free(*l);
+        *l = c;
+
+        return 0;
+}
+
+int strv_consume(char ***l, char *value) {
+        int r;
+
+        r = strv_push(l, value);
+        if (r < 0)
+                free(value);
+
+        return r;
+}
+
+int strv_consume_prepend(char ***l, char *value) {
+        int r;
+
+        r = strv_push_prepend(l, value);
+        if (r < 0)
+                free(value);
+
+        return r;
+}
+
 int strv_extend(char ***l, const char *value) {
         char *v;
-        int r;
 
         if (!value)
                 return 0;
@@ -389,11 +432,7 @@ int strv_extend(char ***l, const char *value) {
         if (!v)
                 return -ENOMEM;
 
-        r = strv_push(l, v);
-        if (r < 0)
-                free(v);
-
-        return r;
+        return strv_consume(l, v);
 }
 
 char **strv_uniq(char **l) {
@@ -522,3 +561,18 @@ void strv_print(char **l) {
         STRV_FOREACH(s, l)
                 puts(*s);
 }
+
+int strv_extendf(char ***l, const char *format, ...) {
+        va_list ap;
+        char *x;
+        int r;
+
+        va_start(ap, format);
+        r = vasprintf(&x, format, ap);
+        va_end(ap);
+
+        if (r < 0)
+                return -ENOMEM;
+
+        return strv_consume(l, x);
+}