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Add virFileTouch for creating empty files
Add a virFileTouch API which ensures that a file will always exist, even if zero length * src/util/virfile.c, src/util/virfile.h, src/libvirt_private.syms: Introduce virFileTouch
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@ -1174,6 +1174,7 @@ virFileDirectFdNew;
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virFileFclose;
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virFileFdopen;
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virFileRewrite;
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virFileTouch;
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# virkeycode.h
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@ -390,3 +390,24 @@ cleanup:
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}
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return ret;
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}
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int virFileTouch(const char *path, mode_t mode)
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{
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int fd = -1;
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if ((fd = open(path, O_WRONLY | O_CREAT, mode)) < 0) {
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virReportSystemError(errno, _("cannot create file '%s'"),
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path);
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return -1;
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}
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if (VIR_CLOSE(fd) < 0) {
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virReportSystemError(errno, _("cannot save file '%s'"),
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path);
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VIR_FORCE_CLOSE(fd);
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return -1;
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}
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return 0;
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}
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@ -74,4 +74,6 @@ int virFileRewrite(const char *path,
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virFileRewriteFunc rewrite,
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void *opaque);
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int virFileTouch(const char *path, mode_t mode);
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#endif /* __VIR_FILES_H */
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