summaryrefslogtreecommitdiff
path: root/src/basic/fileio.c
diff options
context:
space:
mode:
authorLennart Poettering <lennart@poettering.net>2016-06-24 16:01:14 +0200
committerLennart Poettering <lennart@poettering.net>2016-06-24 16:01:14 +0200
commit03c2b2889fa2d090d7953e28124ec5d00898289d (patch)
tree9c9c6a7f4d63510817142e8f30acabe9abf5abe1 /src/basic/fileio.c
parent5816a84352e19492df61036d26eff0eb00f2d8c0 (diff)
machined: "machinectl clean" can take a while, do it asynchronously from a background process
This is a follow-up to 5d2036b5f3506bd0ff07042aee8d69c26db32298, and also makes the "machinectl clean" verb asynchronous, after all it's little more than a series of image removals. The changes required to make this happen are a bit more comprehensive as we need to pass information about deleted images back to the client, as well as information about the image we failed on if we failed on one. Hence, create a temporary file in /tmp, serialize that data into, and read it from the parent after the operation is complete.
Diffstat (limited to 'src/basic/fileio.c')
-rw-r--r--src/basic/fileio.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/src/basic/fileio.c b/src/basic/fileio.c
index 29f5374222..0360a8eab3 100644
--- a/src/basic/fileio.c
+++ b/src/basic/fileio.c
@@ -1354,3 +1354,44 @@ int link_tmpfile(int fd, const char *path, const char *target) {
return 0;
}
+
+int read_nul_string(FILE *f, char **ret) {
+ _cleanup_free_ char *x = NULL;
+ size_t allocated = 0, n = 0;
+
+ assert(f);
+ assert(ret);
+
+ /* Reads a NUL-terminated string from the specified file. */
+
+ for (;;) {
+ int c;
+
+ if (!GREEDY_REALLOC(x, allocated, n+2))
+ return -ENOMEM;
+
+ c = fgetc(f);
+ if (c == 0) /* Terminate at NUL byte */
+ break;
+ if (c == EOF) {
+ if (ferror(f))
+ return -errno;
+ break; /* Terminate at EOF */
+ }
+
+ x[n++] = (char) c;
+ }
+
+ if (x)
+ x[n] = 0;
+ else {
+ x = new0(char, 1);
+ if (!x)
+ return -ENOMEM;
+ }
+
+ *ret = x;
+ x = NULL;
+
+ return 0;
+}