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+id = 1113
+title = "TMPDIR is not usable for snapshot-blockdevs, if not root"
+state = "opened"
+created_at = "2022-07-20T10:52:40.785Z"
+closed_at = "n/a"
+labels = ["Storage", "workflow::Needs Info"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/1113"
+host-os = "linux"
+host-arch = "n/a"
+qemu-version = "n/a"
+guest-os = "n/a"
+guest-arch = "n/a"
+description = """for using static disk-content we're using `snapshot`-flag for certain disks and set `TMPDIR` to a VM-specific path.
+
+when started as root, all is ok.
+
+when started as non-root, `getenv(TMPDIR)` in function `get_tmp_filename()` in file `block.c` return `NULL`, because glibc handles `TMPDIR` as `UNSECURE_ENVVAR` (glibc-src: `sysdeps/generic/unsecvars.h`)
+
+well, we could compile qemu by ourself, but then we might miss important updates, so maybe this can be solved in main-source?
+
+possible solutions: 
+- additionally look at another var like `QEMU_TMPDIR`, if `getenv("TMPDIR")` results in `NULL`
+- add a global option to qemu like `--tmpdir=...`
+- add a device-specific option like `snapshotdir=...`"""
+reproduce = "n/a"
+additional = "n/a"