diff --git a/src/qemu/qemu_firmware.c b/src/qemu/qemu_firmware.c index 8f718ee2a6..7695eb5d9b 100644 --- a/src/qemu/qemu_firmware.c +++ b/src/qemu/qemu_firmware.c @@ -21,9 +21,11 @@ #include #include "qemu_firmware.h" +#include "configmake.h" #include "qemu_capabilities.h" #include "virarch.h" #include "virfile.h" +#include "virhash.h" #include "virjson.h" #include "virlog.h" #include "virstring.h" @@ -899,3 +901,144 @@ qemuFirmwareFormat(qemuFirmwarePtr fw) return virJSONValueToString(doc, true); } + + +static int +qemuFirmwareBuildFileList(virHashTablePtr files, const char *dir) +{ + DIR *dirp; + struct dirent *ent = NULL; + int rc; + int ret = -1; + + if ((rc = virDirOpenIfExists(&dirp, dir)) < 0) + return -1; + + if (rc == 0) + return 0; + + while ((rc = virDirRead(dirp, &ent, dir)) > 0) { + VIR_AUTOFREE(char *) filename = NULL; + VIR_AUTOFREE(char *) path = NULL; + + if (ent->d_type != DT_REG && ent->d_type != DT_LNK) + continue; + + if (STRPREFIX(ent->d_name, ".")) + continue; + + if (VIR_STRDUP(filename, ent->d_name) < 0) + goto cleanup; + + if (virAsprintf(&path, "%s/%s", dir, filename) < 0) + goto cleanup; + + if (virHashUpdateEntry(files, filename, path) < 0) + goto cleanup; + + path = NULL; + } + + if (rc < 0) + goto cleanup; + + ret = 0; + cleanup: + virDirClose(&dirp); + return ret; +} + +static int +qemuFirmwareFilesSorter(const virHashKeyValuePair *a, + const virHashKeyValuePair *b) +{ + return strcmp(a->key, b->key); +} + +#define QEMU_FIRMWARE_SYSTEM_LOCATION PREFIX "/share/qemu/firmware" +#define QEMU_FIRMWARE_ETC_LOCATION SYSCONFDIR "/qemu/firmware" + +int +qemuFirmwareFetchConfigs(char ***firmwares, + bool privileged) +{ + VIR_AUTOPTR(virHashTable) files = NULL; + VIR_AUTOFREE(char *) homeConfig = NULL; + VIR_AUTOFREE(char *) xdgConfig = NULL; + VIR_AUTOFREE(virHashKeyValuePairPtr) pairs = NULL; + virHashKeyValuePairPtr tmp = NULL; + + *firmwares = NULL; + + if (privileged) { + /* This is a slight divergence from the specification. + * Since the system daemon runs as root, it doesn't make + * much sense to parse files in root's home directory. It + * makes sense only for session daemon which runs under + * regular user. */ + if (VIR_STRDUP(xdgConfig, virGetEnvBlockSUID("XDG_CONFIG_HOME")) < 0) + return -1; + + if (!xdgConfig) { + VIR_AUTOFREE(char *) home = virGetUserDirectory(); + + if (!home) + return -1; + + if (virAsprintf(&xdgConfig, "%s/.config", home) < 0) + return -1; + } + + if (virAsprintf(&homeConfig, "%s/qemu/firmware", xdgConfig) < 0) + return -1; + } + + if (!(files = virHashCreate(10, virHashValueFree))) + return -1; + + if (qemuFirmwareBuildFileList(files, QEMU_FIRMWARE_SYSTEM_LOCATION) < 0) + return -1; + + if (qemuFirmwareBuildFileList(files, QEMU_FIRMWARE_ETC_LOCATION) < 0) + return -1; + + if (homeConfig && + qemuFirmwareBuildFileList(files, homeConfig) < 0) + return -1; + + /* At this point, the @files hash table contains unique set of filenames + * where each filename (as key) has the highest priority full pathname + * associated with it. */ + + if (virHashSize(files) == 0) + return 0; + + if (!(pairs = virHashGetItems(files, qemuFirmwareFilesSorter))) + return -1; + + for (tmp = pairs; tmp->key; tmp++) { + const char *path = tmp->value; + off_t len; + + if ((len = virFileLength(path, -1)) < 0) { + virReportSystemError(errno, + _("unable to get size of '%s'"), + path); + return -1; + } + + VIR_DEBUG("firmware description path '%s' len=%jd", + path, (intmax_t) len); + + if (len == 0) { + /* Empty files are used to mask less specific instances + * of the same file. */ + continue; + } + + if (virStringListAdd(firmwares, path) < 0) + return -1; + } + + return 0; +} diff --git a/src/qemu/qemu_firmware.h b/src/qemu/qemu_firmware.h index 952615d42b..ea9be3bbd7 100644 --- a/src/qemu/qemu_firmware.h +++ b/src/qemu/qemu_firmware.h @@ -37,4 +37,8 @@ qemuFirmwareParse(const char *path); char * qemuFirmwareFormat(qemuFirmwarePtr fw); +int +qemuFirmwareFetchConfigs(char ***firmwares, + bool privileged); + #endif /* LIBVIRT_QEMU_FIRMWARE_H */